Having problems with your 1986 BMW 7 Series ?
Thump Thump Thump coming from rear when Hard Accelerating in 1st
\015 When I hammer on the gas in first gear I hear and feel a thumping (thump thump thump) coming from the back of my car. It only happens if you accelerate fastand only in first gear. Could it be the rear diff? or u joint??Its an Automatic 4 speed trans in an 1986 735iAny help would be appreciated THANKS!!!\015
It does sound like one of the universal joints. If you can raise the back end off the ground engage gear and the faulty u/v joint will make the wheel jump. This will let you know which side it is
Repair Help & Product Troubleshooting for 1986 BMW 7 Series
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