2016 Chevrolet Corvette Transmission and drivetrain Problems

“I have a '16 Corvette z-51 w/8-speed auto trans. Ordered car brand new in april 2015 - took possession in sept. 2015. Car turned 6,000 miles in april 2021. On a drive recently, rear end began to experience a shudder/ vibration between 50-65 MPH like driving over small rumble strips. Internet research resulted in me finding the existence of service bulletin no. 18-na-355, dated february 2019 and an updated bulletin with same number dated april, 2020. Problem is a known problem for a host of GM vehicles from 2015-19 with the GM 8l45 and 8l90 8-speed automatic transmissions. …”

“While attempting to accelerate or decelerate my car I feel a hesitation, followed by a significant shudder when the vehicle's automatic transmission changes gears. The shudder, shake and hesitation also occurs while my vehicle accelerates in a single gear, and not actively shifting gears. The problem does not merely result in an uncomfortable driving condition. The shuddering and hesitation seem to be related to internal issues within the transmission and/or torque converter causing friction surfaces, hydraulic systems, and gears to not function properly. …”

“Veh purchased 9/2015 and so far I have replace four rear rims and one front. All have hair line cracks on the inside of rim causing radical air loss, vibration and tire wear. Navigation screen flickers and goes on and off at least two times a week and I have to open and close to restart screen. Blower motor went out at 37k miles and the transmission is bucking, vibrating, shuddering and going into 5th gear at 31mph and feels like it is hanging up in 5th gear the clunks down to first at 10mph. Went to dealer, they claimed they did a software up date and things are fine. …”

“Known issues with a sub standard torgue coverter causing a shudder and jerky motion the car starts demonstrating accompanied by fluctuating engine rpms. This Corvette is equipped with a 8i90 8 speed automatic transmission. Its especially noticeable when cruising at highway speed with the cruise control engaged, however it displays this problem whether the cruise control is engaged or not. This issue seems to have affected about 20,000 corvettes until about the end of october 2016 production dates. …”

“Since 2014 c7 models of Corvette have torque tube failures. Its a coupling at the end of the driveshaft attaching to the differential. Chevy tried a fix in model 2015 that failed. It continues to fail and there are no parts available to do the repair. My 2016 just failed but there are cars that fail multiple times since the part have not been redesigned. Part failure results in damage to the differential, drive shaft and transmission. Repair exceeds $6000 and chevy will not repair if out of warranty. Please see google and other Corvette forum complaints. This is ongoing with no resolution”