Barber has a lot of high speed high load right handers, I noticed during around the pits and side roads on the last cool down it was popping, clunking and whining when turned hard at low speeds.


Did I kill it? It had fresh Lucas synthetic with the gm additive in it.

If so what now?

What year axle is it? Does it have an auburn, a torsen or something else in it?

LOL ... welcome to the road of keeping a nice street car nice.

Nothing will surface the weak links like road course duty.

Car is a 99 non ss car, stock rear.

Autox is bad enough to kill diffs in the evil s-10 10-bolt!!!

I have been through 4 different diffs 5 times...all in 2 years of hard autox use...welcome to my hell...

And the noise depends on the diff...if its a torsen, switch the fluid again and just run it. Friend of mine did that and its still working.

Is this the one with the little arm that pops out?

Pull the cover and look for broken teeth on the gears. This is what failed on my car and then eventually destroyed everything.

A buddy of mine told me it has a torsen in it.

99+ most likely Torsen. 98 was Auburn.

S10's use the Gov-Lock diff which is nothing more than a ticking time bomb in any performance application. And yes, the gov-lock is the complex-looking one with the little arm. It's also an 8.5" 10 bolt, and not the 7.625" 10 bolt the Camaros use.

Your 99 should have a Torsen diff. And I'm pretty sure you don't need any additive in it since it doesn't have clutches.

It was just hot. My Auburn did that the first few years I raced it. Hasn't "Cluncked" for awhile so I sprung for a new Trutrack to be ready for Nationals this fall.

Sidney
CMC2 #64

It does have a Torsen, the whining on turns was heat related. The popping was the roto-joints needing to be re torqued. I tightend all the mounting points and lock nuts an its quiet now.

Service manual says it requires the additive.

The additive is just to quiet it down for the street.