Rear Differential Fluid Change

[George B]

No friction modifier. It’s an automatic locker not a limited slip.

 

[HiHoeSilver]

No friction modifier. It’s an automatic locker not a limited slip.

Oh boy, here we go.... lol

 

[George B]

Oh boy, here we go.... lol

Whats wrong?

 

[HiHoeSilver]

Whats wrong?

Nothing. Just about 1000 threads about adding friction modifier or not with certain fluids to the g80. 2000 threads about whether the g80 is a locker or a limited slip...

I have found the best info to be the many youtube videos explaining the operation of the g80, as it is a unique beast that is difficult to label.

As for the fluid (like I said earlier in the thread), you're going to hear..."I added it", "I didn't add it and it's fine", "I didn't use it, but got some chatter, so i added it", "certain brands have it in there already", and then some...

Best as I can gather in having read MANY of these discussions, use the AC Delco part# from the manual and be done with it. A nice gasket like a LubeLocker doesn't hurt. Make sure the fill plugs come out before you remove the drain plugs.

Buy a TruTrac if you want to abuse this rear end for the long haul.

 

[George B]

Nothing. Just about 1000 threads about adding friction modifier or not with certain fluids to the g80. 2000 threads about whether the g80 is a locker or a limited slip...

I have found the best info to be the many youtube videos explaining the operation of the g80, as it is a unique beast that is difficult to label.

As for the fluid (like I said earlier in the thread), you're going to hear..."I added it", "I didn't add it and it's fine", "I didn't use it, but got some chatter, so i added it", "certain brands have it in there already", and then some...

Best as I can gather in having read MANY of these discussions, use the AC Delco part# from the manual and be done with it. A nice gasket like a LubeLocker doesn't hurt. Make sure the fill plugs come out before you remove the drain plugs.

Buy a TruTrac if you want to abuse this rear end for the long haul.

I agree 100% and found this video helpful.
http://videos.eaton.com/detail/videos/vehicle/video/4930055429001/eaton-mlocker-g80-differential

 

[HiHoeSilver]

I agree 100% and found this video helpful.
http://videos.eaton.com/detail/videos/vehicle/video/4930055429001/eaton-mlocker-g80-differential

Gotta love the mfr video. The music is a little much....

"Centrifugal force moves the pawls outwards to engage the latch..."
And then.....BOOM! The pieces of gears are easily swept up with a standard push broom.....

Also love that they say "maintenence free". Lol.

I like these...

I have blown up one G80 and it wasn't the diffs fault. I like them. An engineering feat with very practical performance, at the very least. However, if romping is the plan, forget it. Put a TruTrac in there and tell your buddy with the gravel driveway to watch his paint job.

 

[jakcol997]

Your G80 is the locking differential. Do you have pushbutton 4wd or the handle on the floor by your seat?

Mines a bush button 4WD

 

[BG1988]

Okay! My manual doesn’t say how much I need though.. any ideas?

typical is you fill it up tell it pours back out

remember to take the fill nut off first.....

 

[jakcol997]

Thank you guys so much for your help guys, I really really appreciate it!

 

[jakcol997]

Hahaha so before I even attempted to take the cover off I found out my fill hole is totally rounded out So now idk wth to do..