Fluids

[charles oliver]

I have a 71 Jimmy anyone know what kind and weight of oil
goes in the Rearends. I don't think they are posi. No tags or anything. Front is a 10 bolt back is a 12 bolt ?

What kind of oil goes in the Transfer case ?

I looked in the Haines Manual and it didnt' say.

Thanks
Charlie

[WRMZ71]

If you don't have posi then plain old 80-90W will do you fine. I use valvoline. As far as the transfer goes and somebody please correct me if I"m wrong but straight 10w should be fine.

[charles oliver]

What happens if you put the posi aditive and its not posi?
Would it hurt anything.


This Jimmy is new to me and I haven't driven it much yet so don't really know if its posi or not. I know on the cars they usually have a tag on the rearend if it is posi. These do not.

Thanks
Charlie

[kwmech]

If you are using valvoline then use the 75/90 with a GL-5 rating in BOTH the rear and T-case, that way if there is a posi in the rear it is rated for it, if no posi---well it won't matter.

[Longhorn Man]

if you have the cash, fill them with synthetic, you'll probably never need to chainge it again if you do so. (acording to our indipendedn oil lab at work)

[sbc350gearhead]

Longhorn is correct........unless you submerge the rearend, and get water into the lube.............very bad.

[Longhorn Man]

Good point, if it gets contaminated, it'll need imidiate attention, regardless of your lube of choice.