Differential fluid flush
#1
Differential fluid flush
Hey guys, Just picked up a J30 diff. How do I "flush" the diff out and how much do I fill 'er up to? This is my first time doing this... ever. No seriously... it is...
LOL Thanks for any help!
LOL Thanks for any help!
#2
There is a fill plug higher up on the diff cover. Remove the plug. Place the diff on a level surface and pour the 80W-90 fluid of your choice into this hole. The fluid does not need to be specifically for limited slip differentials, since the VLSD is a sealed unit. Fill the diff until the fluid level is even with the fill hole. This is why it is important for the diff to be on a level surface. Once full, reinstall the fill plug and you're done! Simple!
Last edited by SuperHatch; 04-03-2008 at 04:15 AM. Reason: Typos
#8
when i bought my j30 diff i flushed it with 5-30 weight oil at the shop i just pumped in oil till it came out clear took like 12 quarts lol. i drained it put the drain plug back on.
i filled my diff on the car but thats cause i had a lift anyway just put 80-90 gear oil in the fill plug untill a little leaks out from the fill plug then it has enough mine took like 1.5 quarts.
when my SR goes back in im using Royal Purple 75-90 gear oil in my tranny and diff so ill tell you how it feels... i hope it actually is better not just snake oil cause it was $10 a damn quart lol
i filled my diff on the car but thats cause i had a lift anyway just put 80-90 gear oil in the fill plug untill a little leaks out from the fill plug then it has enough mine took like 1.5 quarts.
when my SR goes back in im using Royal Purple 75-90 gear oil in my tranny and diff so ill tell you how it feels... i hope it actually is better not just snake oil cause it was $10 a damn quart lol
#9
pickup a cheap pump from harbor freight. makes life a lot easier I ran a long pipe and slowly drained fluid into the diff when i first did it. what a ****ty experience that was. i bought a $5 harbor freight pump made the job 50 times easier and faster.
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