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Drivability Question

nocturnalmotors
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nocturnalmotors Enthusiast

nocturnalmotors

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2022 Chevy 3500HD LT SRW CC 8k miles. I'm noticing a vibration under load when "lugging" at the bottom of 3rd gear, mostly. It's felt in the pedal and floorboard. It goes away once the RPM's rise.

 

Also, when going constant ~35-55mph unloaded and accidentally hit the accelerator from a bump (can do on purpose too), the exhaust makes a very noticeable booming noise from under the cab. It does this also with cruise control set and bumping up the speed each MPH on the wheel control. (Boom, boom, boom as you +1 mph for 3 times for example)

 

Just checking if others experience these? Normal?

Edited by nocturnalmotors
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MTU Alum Enthusiast

MTU Alum

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Dealer can put picoscope on seat track and determine which component is causing the vibration.  It maybe how the trucks are but they can see if something isn't right.  You can get some drones when torque converter is locked and you are lugging the engine.

 

#iworkforGM

Edited by MTU Alum
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