Rear Axle Vent Question

[KAPOW]

Nearly any GL5 is fine. Do you know if your rear axle has the factory Tracloc limited slip differential? If you do just make sure the back of the gear lube bottle says something like 'Compatible with limited slip differentials' which says it has the required friction modifier. Most GL5 lubes have that. Some aftermarket lockers/LSDs specifically advise not to run a friction modifier.

The exact viscosity is not critical. For most casual driving a lower viscosity like 75w-90 or 80W-90 is fine. For towing or more extreme duty something a little heavier like an 85W-140 would be fine.

I have the original window sticker, I'll review that first. I believe is all original. Thanks for the input Jerry.

 

[Jerry Bransford]

I have the original window sticker, I'll review that first. I believe is all original. Thanks for the input Jerry.

Look at the 1 o'clock position on your rear differential cover. If this tag is present you have a Tracloc LSD.

 

[g.hayduke]

Is the fitting you say is "capped off", on the axle tube or the pumpkin part?

 

[KAPOW]

Look at the 1 o'clock position on your rear differential cover. If this tag is present you have a Tracloc LSD.

View attachment 495859

View attachment 495860

Ahh, just the red RTV?

Someone has gotten into the rear diff before, looks like a 5 y/o art project.

Here’s the art project.

 

[KAPOW]

Remove the cap and be done with it.

Soooooo after further inspection with my glasses on this time, turns out the “cap” was a bunch of dirt! Geez, any ways I cleaned it all out and reconnected.

The rear diff fluid is all over the axle. I’ll clean it all up this weekend when I remove the cover and replace the fluid.

 

[macleanflood]

I recall a friend with a mud truck...never washed it... finally did one day, think it was a parade... wouldn't idle...freaked out... vacuum cap missing off the carburetor... speculation it there was so much mud everywhere it sealed up the vacuum leak enough...and washing the truck "broke" it.

I'd wire wheel and clean up that cover and paint it your favorite color.

-Mac