Hi Frank,
If it doesn't break in a day or so!, I would be suspicious of the spider
gears and the dished thrust washers behind them.  I have a 3.9 that
doesn't go clunk in the night, (or day either,) but makes noises at 55-60
as in whine.  Other speeds OK, go figure, You want it?  It's out of the
car now on the floor of the shop, waiting for a new home.  Make me an
offer, I won't be insulted.  Make an offer before I put it on ebay as all
original noises!
Paul 
PAsgeirsson@juno.com
On Thu, 18 Nov 1999 20:54:57 -0500 Frank Clarici <spritenut@Exit109.com>
writes:
>Would anybody know what would cause a good rear (differential) to go 
>bad
>over night?
>My daughter just asked me to drive her car and listen to the clunk in
>the front end. Well I is a definate clunk but it's coming from the 
>rear.
>I thought of a bad U joint, nope.
>I twisted the drive shaft and saw the diff input moving quite a lot,
>ablot 1 inch. This just happened today. The drive shaft bolts are 
>tight,
>the U joint is tight, We tight.
>Any ideas? Is it swap the rear time?
>I knew I should have saved that diff I gave Larry Macy.
>I'm out of 3.9s (this week)
>-- 
> Frank
> Drive it or give it to somebody that will
> http://www.exit109.com/~spritenut/
 
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