I just completed a 5-speed swap into my 190D 2.5L (Today!) and feel a huge clunk between power and decelerate in the same gear, which I never felt with the auto.

The rear control arm (upper and lower) bushings are shot, do you think they could cause such a clunk?? From inside the car it feels as though the rear diff is being held in by one bolt.

Flex discs and center bearings are fine, and I could not pry the diff much from the body with a pry bar (diff bushings seem OK).

Thanks,
John

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1986 190D, 2.5L, 5-speed swap, 180,000 Miles (60K by me).
Jeep CJ-7 with Cummins 4BT/NV4500/AtlastII 4.3.
Grand Wagoneer 4BT project in progress!