The two Torque-strut mounts look fine. The engine moves back and forth when car is put into drive or reverse, and sometimes the car doesn't "shift" into gear. Do I need to replace the motor mount, the transmission mount, or both?
With car in drive/reverse and foot hard on brake if the engine moves when gas pedal is depressed and quickly released in both D&R, then that mount/mounts is defective...
Engine mount should be replaced if:
1) The hard rubber surface is covered with heat check cracks.
2) The rubber is separated from the metal plate of the engine mount.
3) The rubber is split through the center of the engine mount
The transmission case will crack or break if either engine mounts or transmission rear mount is broken...Here is a GM Service bulletin addressing the issue:
#02-07-30-024B
The transmission mount (see drawing) test:
>Raise and support the vehicle
>Raise the transmission/transaxle in order to remove the weight from the transmission/transaxle mount and create slight tension in the rubber.
Replace trans. mount if anyone of the three conditions listed above exist...saailer
I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867
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Put your vehicle in the level surface, run your engine and check first your ATF oil if your oil is in the right measurement before you proceed to the other parts.
Usually if the tranny mount is bad the car pop out gear,but if it doesn't shift you have tranny or linkage problem
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