Service Bulletin Bulletin No.: 18-NA-355 Date: May, 2019 TECHNICAL Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East Operations (MEO).Posts: 23. TSB 18-NA-355 - After effects. Just recently had the 18-NA-355 service bulletin for my 17 SS A8 and noticing the transmission is acting much better but slightly different? The shudder is gone completely which is awesome but i am noticing the RPMs are idling a bit higher around 1800-2000 rpm in 8th at 65-70 vs 1500ish prior to the TSB.Feb 20, 2019 · In fact, 16-NA-175 refers readers to 18-NA-355 for service instructions. 18-NA-355 lists the PN for Mobil 1 Synthetic LV ATF HP as 19417577 for quart containers and 19417904 for 55-gal. drums but, as you stated above, both numbers are incorrect. The correct PN for the quart containers is 19353429. If you do not get it done by then, you will have to pay for the repair yourself. Bottom Line: Free if you get the work done before the expiration date. Recalls. When cars come in for service, shops keep track of what the problems are and what customers are saying about their vehicles. When enough safety- or emissions-related problems have been ...Feb 24, 2021 · This video is just a walk through of what you might be dealing with if you feel an unusual shudder.Subject: Shake and/or Shudder During Light Throttle Acce... You are correct in generally the blue label isn't used on the 6-speed transmissions. 18-NA-355 applies specifically to the RWD 8-speed transmission, I had it performed on my Colorado. I have not seen any suggestion the blue label fluid would be detrimental to the 6 speed, but I don't think it's the answer.Assuming the A8 (not the A10 because your sig says you have a 2016 Camaro), it did receive a service bulletin about the first shift after a cold start, see below. Also make sure you have the latest transmission fluid that introduced in Jan 2019 to prevent transmission shudder, the service bulletin for that issue is 18-NA-355, flushing the A8 ...They were not willing to admit that this is a widespread problem. I showed them the TSB 18-NA-355 that describes the problem. They said a new TSB was released in 2022, TSB 16-NA-361, where it states that this is normal operation and replacing any transmission components will not resolve the problem.Took to Chevy dealership in Dec. of 2019 (@30,000 mi.) to have TSB 18-NA-355 performed. The. Mobil 1 Synthetic LV ATF HP transmission fluid swap was successful until last week when I hit around 52,000 mi. and the same problems began to emerge.. Just took the truck back in for service today.Title: #18-NA-355 - Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed - (Mar 30, 2020) Vehicle: 2017 Cadillac ATS The document preview is shown on the right. To view the entire document you need to have a subscription. Subscribe Feb 24, 2021 · This video is just a walk through of what you might be dealing with if you feel an unusual shudder.Subject: Shake and/or Shudder During Light Throttle Acce... For further information and the fluid exchange procedure, refer to GM corporate Technical Service Bulletin (TSB) 18-NA-355, available in Service Information. The Kit includes: • DT-52263-1 Block Assembly (with 10 foot long fluid drain hose and spring clamp) Bulletin No.: 18-NA-355 April, 2020 Page 3 4733125 • DT-45096-31 TransFlow Adapter (one of two pieces from DT-45096-30) Service Procedure Initial TransFlow Flush Machine Setup Important: The prepping procedure only needs to be completed if the DT-45096 supply reservoir has DEXRON VI fluid in it and has not been converted to Bulletin No.: 18-NA-161 October, 2019 Page 3 Correction 1 Important: The following steps must be completed in order. Grasping or attempting to rotate cables could affect readings and should be doneafter performing the voltage drop measurement. Note: When checking voltage drop, the voltage drop should be performed with the fuelJun 13, 2019 · Join Date: Jun 2013. Location: Hackettstown, NJ. Posts: 209. After TSB 18-NA-355 Was Performed. 2018, 2SS Camaro with K&N cold air intake, flowmaster american thunderaxle back exhaust and AFM range finder. I just had the Transmission flush TSB 18-NA-355 performed today. I swear my engine and exhaust sound noticeably quieter after the flush. Bulletin No.: 18-NA-355 April, 2020 Page 3 4733125 • DT-45096-31 TransFlow Adapter (one of two pieces from DT-45096-30) Service Procedure Initial TransFlow Flush Machine Setup Important: The prepping procedure only needs to be completed if the DT-45096 supply reservoir has DEXRON VI fluid in it and has not been converted to18-NA-355 TSB (Technical Service Bulletin) which I think is for the transmission fluid flush, the latest update addresses “torque converter clutch (TCC) shudder conditions on 8L45 and 8L90 ” eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X. Affected vehicles include Chevrolet, GMC and Cadillac vehicles, as follows.Assuming the A8 (not the A10 because your sig says you have a 2016 Camaro), it did receive a service bulletin about the first shift after a cold start, see below. Also make sure you have the latest transmission fluid that introduced in Jan 2019 to prevent transmission shudder, the service bulletin for that issue is 18-NA-355, flushing the A8 ...Oct 4, 2017 · TSB 18-NA-355. Note: Required tool kit DT-52263 is shipping from Bosch. All DT-52263 tool kits will ship from Bosch no later than February 14, 2019. If you encounter a vehicle with Torque Converter Clutch (TCC) Shudder prior to receiving tool kit DT-52263 please postpone the repair until you receive your tool kit. Performing repairs other I just took my vehicle into the dealership and they performed the testing required per TSB 18-NA-355. They could not get the pco-scop to register a high enough vibration so they would not warranty the repair. I believe this was because the last TSB 16-na-175 fixed most of the vibration and the small vibrations would not register per 18-na-355.Started experiencing the Transmission Shudder. GM refers to it as SERVICE BULLETIN 18-NA-355. Chevrolet Colorado 2017-2019. Condition: may be described as driving over low rumble strips or Highway with rough expansion joints. Cause: may be due to Torque Converter Clutch Shudder. Correction: Should have the appropriate fluid exchange procedure ...Drives: 2018 2SS. Join Date: Aug 2017. Location: Western PA. Posts: 133. July Update #18-NA-355. Anyone have a copy or link to the most recent shudder TSB? Looks like no diagnosis required if built before March 2019 based on the July update. Only customer complaint needed for dealers to perform the flush. I think I may have the start of the ... Mar 29, 2023 · The TSB 18-NA-355 states that General Motors knew about the Transmission Shudder as early as 2015, but only created the TSB in August 2019, "and this shows that General Motors suppressed information and decided to send vehicles to consumers anyway. According to the TSB Cadillac, Camaro, and GMCPI1178F warns Service Technicians about premature ... Jan 4, 2022 · They were not willing to admit that this is a widespread problem. I showed them the TSB 18-NA-355 that describes the problem. They said a new TSB was released in 2022, TSB 16-NA-361, where it states that this is normal operation and replacing any transmission components will not resolve the problem. Jul 29, 2019 · TSB-NA-355 was reference on the paperwork. All is good for now Bill 2023 GMC Canyon Denali | 1-20 - 1100 ordered | 2-24 - 3800 Built | 4-27 - 6000 Delivered 2023 Chevy Camaro 2SS 1LE 2018 GMC Canyon Denali Crew Cab 4WD V6 (sold) 2015 GMC Canyon SLT Crew Cab 4WD (sold) 2004 Chevy Colorado Z71 Crew Cab 4WD (sold) Apr 27, 2020 · Which revision of 18-NA-355 was followed and which fluid was used? It matters. Reply. steven says: May 5, 2020 at 6:42 am #16-NA-361 Document ID:4605342 The latest fluid was used. Reply. Jul 13, 2020 · Note: a copy of the GM service bulletin 18-NA-355 can be found online. Local Transmission Shop to the Rescue! The problem with the 8L90 and 8L45 transmissions is certainly not unique, and really points out the importance of using the right transmission fluid! If I am reading the 18-NA-355 that you posted for the c-7 corvette right, it looks likes if your corvette was made AFTER Feb. 1st of 2019 you should have the new fluid in it ? Yes, that's correct. Also 18-NA-355 TBS I posted is the latest version dated April 2020 which replaced the August 2019 version that was also posted above. The issue about the TCC shudder that many of us have experienced, and apparently carried over to a variety of GM models with the same trans assembly, seems to pretty accurately described in TSB #18-NA-355 (22 pages). I got the TSB number, because the dealer printed it in my service invoice (N/C, since I am under the powertrain warranty).The Technical Service Bulletin (TSB) #17-01-046 for this recall was published on June 3, 2017.2 Refer to . Hyundaitechinfo.com for the latest TSB.Sep 18, 2019 · C7 General Discussion - LATEST TSB 18-NA-355 for AUTO TRANS SHUDDER - I found and attached the latest TSB 18-NA-355 regarding automatic transmission shudder. It was on the NHTSA website. The latest update is July 29, 2019. I also found another bulletin that applies, see attached TSB 19-NA-142 The issue about the TCC shudder that many of us have experienced, and apparently carried over to a variety of GM models with the same trans assembly, seems to pretty accurately described in TSB #18-NA-355 (22 pages). I got the TSB number, because the dealer printed it in my service invoice (N/C, since I am under the powertrain warranty).Jun 13, 2019 · Join Date: Jun 2013. Location: Hackettstown, NJ. Posts: 209. After TSB 18-NA-355 Was Performed. 2018, 2SS Camaro with K&N cold air intake, flowmaster american thunderaxle back exhaust and AFM range finder. I just had the Transmission flush TSB 18-NA-355 performed today. I swear my engine and exhaust sound noticeably quieter after the flush. Apr 27, 2020 · Which revision of 18-NA-355 was followed and which fluid was used? It matters. Reply. steven says: May 5, 2020 at 6:42 am #16-NA-361 Document ID:4605342 The latest fluid was used. Reply. TECHNICAL. Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed. Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East Operations (MEO). Mexico and Export Regions should follow Bulletin 19-NA-018. Brand: Title: #18-NA-355 - Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed - (Mar 30, 2020) Vehicle: 2016 Chevrolet Silverado - 4WD The document preview is shown on the right. To view the entire document you need to have a subscription. SubscribeThe auto manufacturers had no legal obligation to repair the cars. Technical Service Bulletins are issued by manufacturers when there is a problem found in a number of cars which does not have an ...Drives: 2018 2SS. Join Date: Aug 2017. Location: Western PA. Posts: 133. July Update #18-NA-355. Anyone have a copy or link to the most recent shudder TSB? Looks like no diagnosis required if built before March 2019 based on the July update. Only customer complaint needed for dealers to perform the flush. I think I may have the start of the ... Chevrolet TSB 18-NA-177. Some customers may comment on any of the following conditions: A shake and/or shudder during light throttle acceleration between 25 and 80 mph (40 and 128 km/h) steady state driving when transmission is not actively shifting gears. A shudder feeling that may be described as driving over rumble strips or rough pavement.Aug 18, 2020 · My 2015 is torn down as we speak for the torque converter flood back. There are two different TSB's here. The fluid flush to address the shudder is 18-NA-355. Mine is in for the delayed engagement issue where after sitting overnight, when going into drive there is a 3 second delay followed by a harsh "bang" as it engages. That tsb is 16-NA-014. The latest revision of the shudder TSB (July 8 2019 : 18-NA-355 TSB) now states to go ahead and just do the flush if it has not yet been performed. This is good news, and what GM should have done from the beginning with this latest fluid if they were so confident in it.Apr 27, 2021 · C7 General Discussion - 18-NA-355 Shudder - Does Service Bulletin 18-NA-355 cover all 2017 model year Corvettes built before 2/1/19? Or does it only cover certain VIN’s? (M5U trans) Both my dealer and the Chevy customer assistance phone line say my vehicle is not covered because of my VIN. Apr 21, 2023 · This problem currently affects 11 different models across 3 different OEM brands for the model years between 2015 and 2019. After implementing several fluid revisions, GM’s latest solution (TSB 18-NA-355) is lengthy, complicated and expensive. It Bulletin No.: 18-NA-355 April, 2020 Page 3 4733125 • DT-45096-31 TransFlow Adapter (one of two pieces from DT-45096-30) Service Procedure Initial TransFlow Flush Machine Setup Important: The prepping procedure only needs to be completed if the DT-45096 supply reservoir has DEXRON VI fluid in it and has not been converted to Mar 29, 2023 · The TSB 18-NA-355 states that General Motors knew about the Transmission Shudder as early as 2015, but only created the TSB in August 2019, "and this shows that General Motors suppressed information and decided to send vehicles to consumers anyway. According to the TSB Cadillac, Camaro, and GMCPI1178F warns Service Technicians about premature ... Discussion Starter · Jul 11, 2021. I've read about both some quick and painless service appointments, and some not so easy ones as well. I'll drop my truck off tomorrow for the initial diagnostic, which I already know is the infamous shudder/shake. I'd also like an RFB, alignment, tire rotation, and a new TC if they deem appropriate.Title: #18-NA-355 - Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed - (Mar 30, 2020) Vehicle: 2016 Chevrolet Silverado - 4WD The document preview is shown on the right. To view the entire document you need to have a subscription. Subscribe Illinois. Oct 25, 2021. #16. AngryScientist said: 18 Chevy Colorado V6/8-sp trans. 29000 miles. Just developed the dreaded, well known shudder issue on light acceleration. There is a TSB out there to flush the trans with new Mobil 1 Synthetic LV ATF HP fluid; which allegedly corrects the issue in the torque converter clutch area if the wear is ...The Technical Service Bulletin (TSB) #17-01-046 for this recall was published on June 3, 2017.2 Refer to . Hyundaitechinfo.com for the latest TSB.Shudder TSB 18-NA-355 has been updated 7/19. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done.Transmission flush fixed the shudder. (Tsb 18-NA-355) Took my 2018 Colorado WT in for the flush at the Chevy service center I get all my routine work done at. It was all covered under warranty as I only have 18,900 miles on it. Glad the flush fixed the issue. Runs smooth now, and the shifting is like night and day. The whole process took about ... In January 2019, GM issued TSB 18-NA-355 entitled, “Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed.”Has the TSB 18-NA-355 Transmission Fluid Exchange fix your transmission shutter issues. We've linked to so many versions of TSBs it's easy to be looking at one when you think it's the other. I believe the one dated August 2019 is the most recent, with the last revisions in July, unless someone has found one that's even more recent.If you do not get it done by then, you will have to pay for the repair yourself. Bottom Line: Free if you get the work done before the expiration date. Recalls. When cars come in for service, shops keep track of what the problems are and what customers are saying about their vehicles. When enough safety- or emissions-related problems have been ...My 2015 is torn down as we speak for the torque converter flood back. There are two different TSB's here. The fluid flush to address the shudder is 18-NA-355. Mine is in for the delayed engagement issue where after sitting overnight, when going into drive there is a 3 second delay followed by a harsh "bang" as it engages. That tsb is 16-NA-014.According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses “torque converter clutch (TCC) shudder conditions on 8L45 and 8L90” eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X. Affected vehicles include Chevrolet, GMC and Cadillac vehicles, as follows. Aug 30, 2019 · The latest revision of the shudder TSB (July 8 2019 : 18-NA-355 TSB) now states to go ahead and just do the flush if it has not yet been performed. This is good news, and what GM should have done from the beginning with this latest fluid if they were so confident in it. Which revision of 18-NA-355 was followed and which fluid was used? It matters. Reply. steven says: May 5, 2020 at 6:42 am #16-NA-361 Document ID:4605342 The latest fluid was used. Reply.Feb 12, 2023 · You are correct in generally the blue label isn't used on the 6-speed transmissions. 18-NA-355 applies specifically to the RWD 8-speed transmission, I had it performed on my Colorado. I have not seen any suggestion the blue label fluid would be detrimental to the 6 speed, but I don't think it's the answer. Oct 10, 2019 · TSB 18-NA-355 is the one you want, but it also states to not replace the torque converter. With that said I was able to get mine replaced with the fluid/flush. It's likely dealer dependant. In my case the dealer saw the metal shavings in the fluid from the torque converter clutches, so they told GM, and they said to go ahead and replace it Jul 13, 2020 · Note: a copy of the GM service bulletin 18-NA-355 can be found online. Local Transmission Shop to the Rescue! The problem with the 8L90 and 8L45 transmissions is certainly not unique, and really points out the importance of using the right transmission fluid! Apr 27, 2021 · C7 General Discussion - 18-NA-355 Shudder - Does Service Bulletin 18-NA-355 cover all 2017 model year Corvettes built before 2/1/19? Or does it only cover certain VIN’s? (M5U trans) Both my dealer and the Chevy customer assistance phone line say my vehicle is not covered because of my VIN. Posts: 23. TSB 18-NA-355 - After effects. Just recently had the 18-NA-355 service bulletin for my 17 SS A8 and noticing the transmission is acting much better but slightly different? The shudder is gone completely which is awesome but i am noticing the RPMs are idling a bit higher around 1800-2000 rpm in 8th at 65-70 vs 1500ish prior to the TSB.Chevrolet TSB 18-NA-355 Make: Chevrolet Number: 18-NA-355 Title: Shake And/Or Shudder During Light Throttle Acceleration Between 25 And 80 Mph (40 And 128 Km/H) At Steady Speed Date: 1/17/2019 Models: 2017-2019 Camaro LS; 2016-2019 Camaro LT; 2016-2019 Camaro SS; 2017-2019 Camaro ZL1; 2017-2019 Colorado; 2017-2019 Colorado LT; 2017-2019 ...18-NA-355 18-NA-355 Shake And/Or Shudder During Light Throttle Acceleration Between 25 And 80 Mph (40 And 128 Km/H) At Steady Speed 1/17/2019 ATS Luxury ATS Premium Luxury ATS Premium Performance ATS-V CT6 Luxury CT6 Platinum CT6 Plug-In CT6 Premium Luxury CTS Luxury CTS Premium Luxury CTS Vsport CTS Vsport Premium CTS Vsport Premium Luxury CTS-VChevrolet TSB 18-NA-355 Make: Chevrolet Number: 18-NA-355 Title: Shake And/Or Shudder During Light Throttle Acceleration Between 25 And 80 Mph (40 And 128 Km/H) At Steady Speed Date: 1/17/2019 Models: 2017-2019 Camaro LS; 2016-2019 Camaro LT; 2016-2019 Camaro SS; 2017-2019 Camaro ZL1; 2017-2019 Colorado; 2017-2019 Colorado LT; 2017-2019 ...If I am reading the 18-NA-355 that you posted for the c-7 corvette right, it looks likes if your corvette was made AFTER Feb. 1st of 2019 you should have the new fluid in it ? Yes, that's correct. Also 18-NA-355 TBS I posted is the latest version dated April 2020 which replaced the August 2019 version that was also posted above.Dec 13, 2018 · I just took my vehicle into the dealership and they performed the testing required per TSB 18-NA-355. They could not get the pco-scop to register a high enough vibration so they would not warranty the repair. I believe this was because the last TSB 16-na-175 fixed most of the vibration and the small vibrations would not register per 18-na-355. Jul 29, 2019 · Shudder TSB 18-NA-355 has been updated 7/19. 96258 Views 354 Replies 83 Participants Last post by DieselDrax , Sep 26, 2022 Jump to Latest. B. BevyofChevys Discussion starter · Jul 29, 2019. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require ... Oct 10, 2019 · TSB 18-NA-355 is the one you want, but it also states to not replace the torque converter. With that said I was able to get mine replaced with the fluid/flush. It's likely dealer dependant. In my case the dealer saw the metal shavings in the fluid from the torque converter clutches, so they told GM, and they said to go ahead and replace it This problem currently affects 11 different models across 3 different OEM brands for the model years between 2015 and 2019. After implementing several fluid revisions, GM’s latest solution (TSB 18-NA-355) is lengthy, complicated and expensive. ItTSB 18-NA-355 was updated July 2019 negating the need for the picoscope diagnosis (see the bottom section in your link), and dealerships were directed to flush their existing stock. Both versions of 18-NA-355 used the same exact Mobil 1 fluid (or the TSB would have had a different number), which my dealership began using Jan 2019.Transmission flush fixed the shudder. (Tsb 18-NA-355) Took my 2018 Colorado WT in for the flush at the Chevy service center I get all my routine work done at. It was all covered under warranty as I only have 18,900 miles on it. Glad the flush fixed the issue. Runs smooth now, and the shifting is like night and day. The whole process took about ...May 6, 2022 · The issue about the TCC shudder that many of us have experienced, and apparently carried over to a variety of GM models with the same trans assembly, seems to pretty accurately described in TSB #18-NA-355 (22 pages). I got the TSB number, because the dealer printed it in my service invoice (N/C, since I am under the powertrain warranty). As of August 7th, GM dealers should also be flushing all potentially affected new vehicles on the lot. According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses “torque converter clutch (TCC) shudder conditions on 8L45 and 8L90” eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X.18-NA-355 TSB (Technical Service Bulletin) which I think is for the transmission fluid flush, the latest update addresses “torque converter clutch (TCC) shudder conditions on 8L45 and 8L90 ” eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X. Affected vehicles include Chevrolet, GMC and Cadillac vehicles, as follows.HenryT · #6 · Mar 1, 2019. Jazzman53 said: GM has stopped doing the torque converter replacements, cancelled the TSB you referenced, and replaced the TSB with #19-NA-355, which applies to 2017-2019 8 speeds. Latter-built 19's already have the new part number TC but some of the earlier build ones don't.C7 General Discussion - 18-NA-355 Shudder - Does Service Bulletin 18-NA-355 cover all 2017 model year Corvettes built before 2/1/19? Or does it only cover certain VIN’s? (M5U trans) Both my dealer and the Chevy customer assistance phone line say my vehicle is not covered because of my VIN.I've read 18-NA-177 and the older 16-NA-175 and now have found that an updated version of 16-NA-175 has this cryptic advice: Important: Do NOT replace the torque converter or transmission assembly for this condition. Engineer reviews have proven that replacing the torque converter does not provide a long-term solution to TCC shudder.TSB-NA-355 was reference on the paperwork. All is good for now Bill 2023 GMC Canyon Denali | 1-20 - 1100 ordered | 2-24 - 3800 Built | 4-27 - 6000 Delivered 2023 Chevy Camaro 2SS 1LE 2018 GMC Canyon Denali Crew Cab 4WD V6 (sold) 2015 GMC Canyon SLT Crew Cab 4WD (sold) 2004 Chevy Colorado Z71 Crew Cab 4WD (sold)TSB-NA-355 was reference on the paperwork. All is good for now Bill 2023 GMC Canyon Denali | 1-20 - 1100 ordered | 2-24 - 3800 Built | 4-27 - 6000 Delivered 2023 Chevy Camaro 2SS 1LE 2018 GMC Canyon Denali Crew Cab 4WD V6 (sold) 2015 GMC Canyon SLT Crew Cab 4WD (sold) 2004 Chevy Colorado Z71 Crew Cab 4WD (sold)Hi John. My local GM dealer recently (1/24/19) diagnosed my 2016 Camaro SS with the same code as your Corvette (18-NA-355). I google searched it and found your post. They flushed and changed my transmission oil (13K miles) and the shudder has greatly improved. However, I am noticing some new hesitations as the transmission shifts in lower gears.Service Bulletin Bulletin No.: 18-NA-355 Date: May, 2019 TECHNICAL Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East Operations (MEO). June 27, 2022 Sponsored by Lubegard General Motors has published multiple technical service bulletins pertaining to torque converter clutch shudder issues in their 8-speed transmissions. This problem currently affects 11 different models across 3 different OEM brands for the model years between 2015 and 2019.Shudder TSB 18-NA-355 has been updated 7/19. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done.Apr 27, 2021 · C7 General Discussion - 18-NA-355 Shudder - Does Service Bulletin 18-NA-355 cover all 2017 model year Corvettes built before 2/1/19? Or does it only cover certain VIN’s? (M5U trans) Both my dealer and the Chevy customer assistance phone line say my vehicle is not covered because of my VIN. Drives: 2018 2SS. Join Date: Aug 2017. Location: Western PA. Posts: 133. July Update #18-NA-355. Anyone have a copy or link to the most recent shudder TSB? Looks like no diagnosis required if built before March 2019 based on the July update. Only customer complaint needed for dealers to perform the flush. I think I may have the start of the ...Drives: 2018 2SS. Join Date: Aug 2017. Location: Western PA. Posts: 133. July Update #18-NA-355. Anyone have a copy or link to the most recent shudder TSB? Looks like no diagnosis required if built before March 2019 based on the July update. Only customer complaint needed for dealers to perform the flush. I think I may have the start of the ... If TCC shudder is present, a vibration peak will appear within +/- 2 Hz of the frequency listed in Bulletin #18-NA-355. Refer to the bulletin for additional information, including required shudder test conditions for each vehicle being diagnosed as well as the fluid exchange procedures. Fig. 11 Fluid ExchangeChevrolet TSB 18-NA-355 Make: Chevrolet Number: 18-NA-355 Title: Shake And/Or Shudder During Light Throttle Acceleration Between 25 And 80 Mph (40 And 128 Km/H) At Steady Speed Date: 1/17/2019 Models: 2017-2019 Camaro LS; 2016-2019 Camaro LT; 2016-2019 Camaro SS; 2017-2019 Camaro ZL1; 2017-2019 Colorado; 2017-2019 Colorado LT; 2017-2019 ...
Apr 13, 2022 · Norcalace · #17 · May 6, 2022. MrYgrmstr said: My car is at the dealer for the next several days to fix the dreaded A8 shudder and a flaky infotainment screen. Man I hope it all gets resolved. As the title states, fingers crossed 🤞🏻. There is a Service Bulletin that covers your issue. It’s Bulletin # 18-NA-355. . Osha 510
TSB 18-NA-355 was updated July 2019 negating the need for the picoscope diagnosis (see the bottom section in your link), and dealerships were directed to flush their existing stock. Both versions of 18-NA-355 used the same exact Mobil 1 fluid (or the TSB would have had a different number), which my dealership began using Jan 2019.If I am reading the 18-NA-355 that you posted for the c-7 corvette right, it looks likes if your corvette was made AFTER Feb. 1st of 2019 you should have the new fluid in it ? Yes, that's correct. Also 18-NA-355 TBS I posted is the latest version dated April 2020 which replaced the August 2019 version that was also posted above. Illinois. Oct 25, 2021. #16. AngryScientist said: 18 Chevy Colorado V6/8-sp trans. 29000 miles. Just developed the dreaded, well known shudder issue on light acceleration. There is a TSB out there to flush the trans with new Mobil 1 Synthetic LV ATF HP fluid; which allegedly corrects the issue in the torque converter clutch area if the wear is ...Mexico and Export Regions should follow Bulletin 19-NA-018. Note: This procedure should only be completed once per vehicle. Any vehicle that returns with suspect shudder should be diagnosed utilizing published diagnostics, GDS, PICO Scope or other diagnostic tools. Sometimes shudder is not caused by the torque converter clutch (TCC).This video is just a walk through of what you might be dealing with if you feel an unusual shudder.Subject: Shake and/or Shudder During Light Throttle Acce...Posts: 23. TSB 18-NA-355 - After effects. Just recently had the 18-NA-355 service bulletin for my 17 SS A8 and noticing the transmission is acting much better but slightly different? The shudder is gone completely which is awesome but i am noticing the RPMs are idling a bit higher around 1800-2000 rpm in 8th at 65-70 vs 1500ish prior to the TSB.Feb 24, 2021 · This video is just a walk through of what you might be dealing with if you feel an unusual shudder.Subject: Shake and/or Shudder During Light Throttle Acce... Jul 29, 2019 · Shudder TSB 18-NA-355 has been updated 7/19. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done. Aug 5, 2021 · Noticed the shudder at just under 1200 miles, Dec '18, purchased car new 2/18. Had oil change and 18-na-355 done 2/19 at about 1400 miles. 5575 miles now, still no shudder. Shifts perfectly, quick, crisp. mitch22 Discussion starter · Sep 20, 2020. Cadillac Dealership here in AZ is wanting to do a full transmission service, flush, change the filter and reflush the trans on my 2016 escalade. He said it'd be about 20qts of the new Mobil 1 oil, pan gasket and filter.Feb 20, 2019 · In fact, 16-NA-175 refers readers to 18-NA-355 for service instructions. 18-NA-355 lists the PN for Mobil 1 Synthetic LV ATF HP as 19417577 for quart containers and 19417904 for 55-gal. drums but, as you stated above, both numbers are incorrect. The correct PN for the quart containers is 19353429. Sep 18, 2019 · C7 General Discussion - LATEST TSB 18-NA-355 for AUTO TRANS SHUDDER - I found and attached the latest TSB 18-NA-355 regarding automatic transmission shudder. It was on the NHTSA website. The latest update is July 29, 2019. I also found another bulletin that applies, see attached TSB 19-NA-142 .
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