MarMacMan

Just need to know before I get the car pulled apart a little.

Thanks for any help.

It is Castrol Syntec Synthetic 75W90 Gear Oil.

S2kracka

It is fine to use, just make sure its a GL-5 fluid. I actually prefer Syntec motor oil over Mobil 1 motor oil.

xviper

"Motor" oil won't ever be rated GL-5.

darkfx

ba-zing

dbzerk

Ive got castrol in there now and im having a hard time shifting.. I'm planning to drain it and go with the redline. A few members have the same problem with the castrol..

xviper

In where? The OP started off talking about rear diff fluid (I think), then somebody starts talking about motor oil. Are you talking about tranny fluid or what? Having a particular type of fluid in the rear diff shouldn't make a lot of difference to how the transmission shifts.

OK, everyone, please state which component you are talking about - engine, transmission or rear diff?

iDomN8U

^

I was close to using it (Castrol Gear Oil) since it's readily accessible through retail stores (walmart/canadian tire) but opted to order in Amsoil for the few dollars more.

I'm sure it's good, it's just Castrol has had a poor history.

S2kracka

Never said it was, I'm not retarded. I was making a statement saying that I prefer Castrol synthetics to Mobil 1 synthetics. I figured by specifying one as a GL-5 and the others as motor oil people would figure out easily enough that I was talking about different fluids.

MarMacMan

I am talking about differential fluid.

Should I try to find the Mobil1 (pain in the butt) or should the Castrol be OK?

S2kracka

Use the Castrol 75W-90.