Rear end drive shaft cuppling

Asked by May 25, 2017 at 05:50 AM about the 2004 Chevrolet Silverado 1500 LT Ext Cab Short Bed 2WD

Question type: Maintenance & Repair

I took off the driveshaft because the coupling fell off from the read end.  I
replaced it with a new coupling, but it keeps falling off.  I am unsure of the
reason it does not stay attached.  Can you please give me suggestions on
repairs?

3 Answers

73,035

I would take it to a shop who knows how to tighten this nut. There is a pinion back lash that has to be set while tightening this nut. If it is not followed, you will create problems with the differential ring and pinion gear. The crush bushing may already need replacing from you tightening the nut. There is a specific procedure to follow when tightening this nut. You may need a new nut and locktite applied to the threads. Best take it to someone who knows how to do this.

98,365

First of all did you use a new locknut? Those are a one time use unit. Second make sure there isn't any abnormal vibration in the pinion bearings, if it continues you may have to check the depth of the pinion gear to ring gear.

50,735

Is the nut holding the pinion flange coming loose or are the u-joint retaining fasteners coming loose?

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