My roomate has a 91 FC N/A, and it bounces when the clutch engages and sometimes in gear at low rpms...checked the tranny mounts, good...checked the motor mounts, good...could it be the rear diff mounts? or the stock clutch?

 

It is probably the rear diffrential mount or mabey not..what bounces?? do you hear any sounds comming from the rear or any loud knocking?

 

when the clutch is let up, the whole car shakes back and forth while pressing on the gas...no loud noises...just rocking back and forth...its acting like a front wheel drive car with bad engine mounts...