How much backlash is too much on a diff? - Ford Mustang Forum
 
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post #1 of 3 (permalink) Old 12-21-2010 Thread Starter
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How much backlash is too much on a diff?

I am trying to find a clunk I get when coasting in 2nd or 3rd gear. 2003 V6 5 speed 120,000 miles. I don't think it is the trans, the U joints are solid but I can twist the drive shaft 1/2 inch either direction before the backlash is out. I changed the oil in the diff last night and tooka look at everything. Everything in there looks great. no chips, no real wear, no metal in the old oil. There is no side to side play in the pinion. I am at a loss here.

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post #2 of 3 (permalink) Old 12-22-2010 Thread Starter
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Nothing? Really?

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post #3 of 3 (permalink) Old 12-22-2010
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.008-.0015" is normal. However, I would also check your axles for play in the differential as well. If you Google differential backlash, there are several good articles that you can read.......

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