CAMARO6 - View Single Post - TSB 18-NA-355

neo85 · 08-19-2020, 02:47 PM

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.

Other than that I am noting the exhaust isn't as loud as it used to be (can barely hear the crackles/pops even in track mode - although this could be my imagination). I am wondering if they did any tuning updates along with just the mobil 1 fluid swap?

All in all glad its shifting smoothly for now - I can at least hold off from going aftermarket for a while until the TC gives out (had the swap around 20k miles so hope I caught it early enough).

Anyone else with noticeable differences couple thousand miles out after doing the most recent TSB??

08-19-2020, 02:47 PM	#1
neo85 Drives: camaro ss Join Date: Jun 2018 Location: washington Posts: 26	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. Other than that I am noting the exhaust isn't as loud as it used to be (can barely hear the crackles/pops even in track mode - although this could be my imagination). I am wondering if they did any tuning updates along with just the mobil 1 fluid swap? All in all glad its shifting smoothly for now - I can at least hold off from going aftermarket for a while until the TC gives out (had the swap around 20k miles so hope I caught it early enough). Anyone else with noticeable differences couple thousand miles out after doing the most recent TSB??