The posi will normally make a grinding noise, or a "chatter" that you can feel as you turn. As I said, I've never heard of a diff making a squeak, but....I ain't the sharpest tool in da box.
A u-joint, if dry,
will squeak at certain times, usually when the tires are rolling slowly, such as when you turn, or when first taking off from a stop. A wheel bearing will squeak the same way.
[QUOTE=Corvette77]
After a normal run of about 20 mins or so when I make turns in either direction the rear end wines and squeaks. Once the car is put back into a straight line she is fine.[/QUOTE]
This description leads one to think it is the posi unit...perhaps the description of the noise itself needs clarifying?
As far as what brand of gear lube to use, any name brand will work just fine. Most of them will say that their lube already has the posi additives in it, but....I doubt that whatever they have in it is compatible with our older cars, and posi units.
The GM posi additive is really the best bet...
two bottles is recommended. I also use the posi additive from
Lubegard, and have not had any problems with it in all of the years I've used it. I couldn't say if other brands are good...I've never used anything but the GM, and Lubegard additives.
hth
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Joel Adams
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