are my diff clutches going bad?

[Renthorin]

Posted this on the other tb.com site because I thought it was this site. Wondered why it said I hadn't been online there in a while. Oh well...getting old I guess.

Anywho...

A while ago I changed the fluid in the diff. Put in Royal Purple and added some GM anti-chatter.

When I make sharp left turns the diff (at least I assume so) vibrates and makes noise. Does not do that when I turn to the right.

Of late, the noise has gotten worse. Is this indicative of clutches going bad?

Will

 

[earlbrown]

Usually chatter means the clutches are 'grabby' not worn out and slipping. Try switching back to whatever oil gave you good results or toss in a second bottle of the GM whale jizz.

 

[captflash]

I changed my differential fluid to synthetic, or rather the mechanic did thinking it was better, and my diff made noise and vibrated, changed back and all good.

 

[Renthorin]

That actually makes sense. I was curious what the symptoms of bad clutches would be as she leaves two long black patches every time.

I'll go to a different fluid and see how that works. What is the viscosity again? I can't remember.

 

[captflash]

I want to say 80/90 w but I am not certain but NON synthetic for sure

 

[oliver12]

80/90 with the gm additive. Did the same thing it should fix it.

 

[626gn]

I've used regular 75w-90 with a bottle of additive - no problems.

 

[turbo nasty]

I would try Dino

 

[earlbrown]

That's odd. Usually the dino needs more additive than full synthetic. Mine's worn so it doesn't need any additive no matter what fluid I use.

 

[we4Mateo]

That's odd. Usually the dino needs more additive than full synthetic. Mine's worn so it doesn't need any additive no matter what fluid I use.

Me too! I had to change the fluid and NOT add additive to get them to work well again.

 

[turbo nasty]

Instructions from Eaton when installing a clutch type posi is to NOT use synthetic as it will hamper operation