1985 BMW 535i Car makes a thump when the clutch is released

1985 BMW 535I
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JIMIG
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Drive Train Axles Bearings problem
1985 BMW 535i 6 cyl Two Wheel Drive Manual 200K miles

When changing gears if the clutch is released quikly there is a loud thump in the rear of the car. If I release the cluthc smoothly no sound. My question is...would this be drive shaft related or axle related? And how do I check which is bad? Second problem is the car idles fine at 800 rpms; however, when the accelerator is pressed the car chokes out. I have replaced the fuel filter but no change. Is there anyay to determine which pump or relay is bad? Also, the fuel issue is spordic.
Nov 5, 2009 at 4:12 PM
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DOCHAGERTY
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The noise is possibly the sub-frame bushings, inspect for broken bushings and/or the differential mount too. As to the running issue, start with checking the valve lash, plug gap, throttle plate position, and general state of tune.
Nov 6, 2009 at 8:32 AM