Write up on Differential oil change
 

Whoever wrote that.... THANK YOU!!!!!!!



3/8 torque wrench w/ socket set 25$
Oil Catch pan 5$
75W90 Gear oil 30$
.
.
Knowing I didn't get ripped off by the dealership...... Priceless!!!!

Mr.Bunny

x2...Did my first diff change with the help of the forum write-up. Good opportunity to learn something new and save a few bucks :clap:

Yup, did mine recently too...

Had a leaky RTV seal, so I picked up some lube locker gaskets and solved the problem without having to go to the dealer.

Saved me a bundle...dealership wanted $150/differential:crazyeyes::naw:

Eastcoast dealer wanted $220, it was easy to reply I'll do it myself. Can someone paste the write-up link, I need which diff oil spec to buy. Cheers

Here you go. Took me 45min to 1 hour tops to change both diff's and this included having a :beer:

https://www.jk-forum.com/forums/show...rential+change

I used 75W90 Royal Purple and is what Wayoflife used. Some people went a thicker oil in the rear if they were pulling a trailer.

Im getting ready to do this as well, how do we know if we need to the additive for the rear diff?

Is there something I should look for on my window sticker?

If you have a limited slip rear diff, then you need an additive IF using traditional oil. Full-synthetic oil does not require an additive. Someone correct me if I'm wrong

Thats what I thought. Thanks. It would say if I had the limited slip on the window sticker right?

you're correct on this. synth oil does not require the additive. :yup:

Thanks! :thumbsup:

Does anybody know what they actually do at the dealership for the Differential Service?

Is it just the fluid change, or do they remove cover/clean/re-RTV? Mine quoted $190 for the service.

Thanks,
D

Changed Oil, T-Case, and both Diffs today myself in about 2 hours for the scheduled 15K service. Added the T-case just for safe measure, not scheduled until 30K. First time I've ever done any of them. Piece of cake with the Project-JK write-ups, thanks.

Diff fluid was rather dark, needed to be changed for sure. Some metal sludge, almost like anti-seize on the magnetic drain plug. Wondering if I had water get in at some point. The front only took just over a quart, and the rear just over 2 though, less than the write-up said.

T-case fluid looked like new.

Mobil 1 5W-20 Oil, 75W-90 Gear Oil, used the Mopar ATF+4 Trans Fluid and Oil Filter.

The transfer case is at 15K? :thinking:

The T-case isn't on the 'Schedule B Maintenance' - suggested here in VT - until 30K.

Since I just went on a 4 day Jeep, 330+ mile trip with significant time in 4LO, figured I'd go ahead and do it early at 15K. It was only around $20 in ATF+4 Fluid and a half hour of my time. Worth it just for learning and piece of mind.