car jumps when I put it on Drive...

1995 CADILLAC DEVILLE
177,000 MILES
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HABREUX
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the car starts ok, but I when put it on Drive, it makes this jump ((tuumm))...it also does it when I put it on Reverse....now just today I changed the engine/trans mounts because someone told me they were the cause. now what could this be? also I have to mention, when Im driving, I can feel the automatic transmission changes, as the car pick ups speed, however, the jumps are less, much less noticeable but are there. what could this be if its not the transmission.
Oct 29, 2011 at 7:55 PM
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RASMATAZ
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Check the driveaxles CV joints/U-joints
Oct 30, 2011 at 7:56 PM