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Old 03-29-2004, 08:29 PM
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G.R. G.R. is offline
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Join Date: Jul 2001
Location: Evans, CO
Cobra Make, Engine: NAF 289 FIA, 347 stroker with Weber 48's, building a '48 Anglia gasser, driving a '55 Chevy resto-rod
Posts: 3,119
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Always had a "whine" in my diff and an ocassional "clunck"--after almost 1500 miles it got worse, turned out is was a bad diff from the get-go, a dye test showed numerous "stress" fractures on the ring gear plus the pinion looked as if it had been put on a grinder--evidently it was a "bad" diff that made it through the process and the tolerances were not set right. Only problem I ever had with my SPF.

I would definitely check it out--I was told if I had gotten on the throttle real hard I would have destroyed the rearend in the condition it was in.
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