Will this Valvoline gear oil work in my GM 12-bolt limited slip diff?
http://www.valvoline.com/pages/products/product_detail.asp?product=58

It says, "SynPower Gear Oil is specially recommended for limited-slip hypoid differentials" and it also says "Contains special additives to reduce chattering in limited-slip differentials", .....

I see it sitting on the local Autozone shelf, so it would make life easy if it works.


:confused:

thanks

Will this Valvoline gear oil work in my GM 12-bolt limited slip diff?
http://www.valvoline.com/pages/products/product_detail.asp?product=58

It says, "SynPower Gear Oil is specially recommended for limited-slip hypoid differentials" and it also says "Contains special additives to reduce chattering in limited-slip differentials", .....

I see it sitting on the local Autozone shelf, so it would make life easy if it works.


:confused:

thanks

When I bought my eaton posi unit for my 67, I gave them a call and asked them if it would be okay to use synthetic gear oil, like mobil 1. The tech told me that the oil is too slippery, and would cause excessive chatter in the differential. He said to use a conventional 80w90 gear oil. So, I bought lucas 80w90. It already has the limited slip additive in it, and is around 6 bucks a quart.

I use synthetic in my 12 bolt with no problems. All GM car and trucks use synthetic gear oil in the rearends and have for years with no problems, Chrysler is the same way as well. Most everything GM makes now, as of 2007 models, use a synthetic in every fluid location, some still use conventional oil in the engine but use synthetics everywhere else. You will be fine using it and I would suggest it in every location a fluid goes.

Im using Amsoil 100% Syn gear lube in my new Eaton Posi with no problem at all. Eaton still wont recommend any particular brand of fluid but since they have not tested every lube on the market, they choose to tell customers to stick to plain dino oil. The lube makers meet all the specs that Eaton requires and some like Amsoil warrant their lube to work fine. Go ahead and use the Syn. :thumbsup:

Thanks for comments gents. I'm gonna try it out.

I was swapping out my rear yoke, upgrading driveshaft from 1310 series (stock) to 1330 series. So, I took the old yoke off and just left it off. When I came out next morning, I had a huge puddle under there. Looks like half the diff fluid leaked out, lol..........

-