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THM400 3 speed tranny reverse jerk

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Old 11-06-2017, 11:18 AM
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Default THM400 3 speed tranny reverse jerk

Hi Guys, not sure if im at the correct forum, but the vehicle i have is a rolls royce silver shadow which uses the 3speed THM400 from GM, which was widely used in cadillacs in the 70s. I am unable to find a solution in the rolls royce forums hence im here =/

The tranny shifts up and down just fine, and engages into Drive smoothly.
However, everytime i shift into reverse, there is a heavy jerk throughout the whole vehicle. My mountings are good hence we can rule that out. The engine RPM is around 700, so its quite alright. Engaging forward gears all are ok. Can i confirm that the tranny is blown? Or are there any other possible sources of adjustment?

Appreciate any advice! Thanks!
 
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