91 camaro clunking in rear end

1991 CHEVROLET CAMARO
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91CAMARO
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i have a 91 rs 3.1. at speeds of 40 and up if i let up off the gas or touch the gas there is clunk that seems to be coming from the back of the car. dont know what it is.
Jan 13, 2006 at 2:27 PM

What to check next

Diagnostic guidance. Suggested checks and possible repairs are separate from the owner's reported results.

Give the repairer the unsuccessful repair history and request inspection to locate the clunk before replacing more components.

Guidance references and applicability

Source: Original question and visible replies. Owner reports and other participants' experiences are distinguished. Next steps are editorial guidance for obtaining diagnosis or clarifying the reported findings; they are not a verified repair procedure or an independently confirmed component diagnosis.

Read the replies · Discussion summary and reported outcome

AI-ASSISTED GUIDANCE · REVIEWED BY 2CARPROS
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PALCO
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how many miles on the u-joints? and have you changed the lube in the differential, its suppost to be changed every 35000 to 45000 miles. most people don't do this service as needed. resulting in failure. good luck
Jan 13, 2006 at 3:19 PM
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91CAMARO
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i put new u joints on it. same problem. added fluid..same problem.
Jan 13, 2006 at 6:54 PM
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PALCO
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change the rear end fluid is what i was getting at you might find chunks! a second thought is maybe the suspension arms bushings, where they attach to the rear diff. and/or the frame. good luck
Jan 14, 2006 at 2:53 AM

Discussion summary

91 camaro clunking in rear end

A 1991 Camaro RS 3.1 had a rear clunk when applying or releasing the accelerator above about 40 mph. The owner said new universal joints and added differential fluid had not changed the problem.

Reported outcome: No confirmed cause or successful repair was reported.

Differential wear and suspension bushings were suggestions without inspection results. The reply's maintenance interval was not verified for this vehicle.

Read the original discussion

AI-ASSISTED SUMMARY · REVIEWED BY 2CARPROS
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