i want fil some diff oil couse the level is too low but i cant find the right oil in my book says sae 90 hypoid but i've looked and that is not for a lsd does anyone knows the answer????
thanx

 

Diff is viscous unit not plated so it takes normal 90 hypoid as book says

 

gearbox man said :
“The SAE90 will do the job, however, filling with a full synthetic 75W/90 will give a better stability when hot.”

Mike rainbird on 2wd diff oil :
Also, I use a top quality fully synthetic gear oil such` as Mobil SHC, which is rated to a lot higher temps than I ever saw...

Jim Green :
Use Mobil Mobilube 1 SHC SAE 75W-90 (Extra High Performance Synthetic Lubricant for Gears and Axles)..... Mike Rainbird can supply this overnight. It's the best protection you can get for the diff, especially bearing in mind track use.

 

when i have done few sideways motions my diff picks up on one wheel, i think the oil in the diff gets to warm and stops it working? can anyone else think of what explains this because when on gravel surface the diff picks up on both wheels

 

thnx guys for the reply i,m gonna fill it tomorow with sae 90