Rear Diff Fluid change out

Can someone please hook me up with a link on how to do this? Mine needs to be done and I cant seem to find a thread on it.

 

very easy, just pull the bottom drain plug on the rear diff, let it drain, plug the drain plug. Open the top fill plug and fill right up to the fill plug.

 

in case you didin't get all that

http://www.clubwrx.net/forums/powertrain/170934-diy-rear-differential-fluid-change.html

 

Be sure to remove the fill plug first.....

 

Yes. What he said. You may want to open the top while draining to allow air for a smoother emptying process. Also, you may want to drive it first so the fluid is warmer and less viscous.

For filling I use Redline 75W-90 gear lube. Not the NS stuff, though. Unless you have a clutch type diff you don't want/need the NS.

 

this! because if you drain it all out and cant get the fill plug open for some reason your f'd

 

u should remove the top bolt first, then bottom
then when drained, put the plug back on the bottom, fill thru the top, then plug up, done.

 

Super! thanks for the info guys. Sounds really easy. Is there any reason for me to worry about overfilling it? Should I just fill it until it starts to pour out of the fill hole?

 

answered your own question

 

Simple. Thanks again.

 

Correct. Once it starts dripping out the top hole, it's full.

 

Yup. It's also a good idea to get a really long hose for filling since there really isn't any room near the fill hole.

 

I used a huge syringe, just squirted the fluid into the hole

yes, i said it

 

I filled mine up to the hole and then after some long drives a bit leaked out. I'm sure it's because of a leaky seal higher up on my diff. It only leaked a couple drops but it kind of freaked me out a bit.

 

Ill just use my old beer bong

 

Where would be the best place to buy the Oil. Any recommended brands?

 

any off the shelf gear oil rated for the rear diff will work just fine.

 

Great. Looks like i have something to do tomorrow night now

 

I think there was a copper washer on the diff plugs, the Morries guy recommended I change out those( after I already left and called back to ask a question.

 

Brands are pretty open. You just need some form of 75w90. A synthetic would be nice for the cold weather though, and I'm a personal fan of the Amsoil Severe Gear. I run it in my tranny and diff. The syncros love the stuff, buttery smooth syncro action. It's also available at Fleet Farm.

However, the rear diff doesn't matter much, no syncros to please. As well, it's either an open diff or a sealed clutch type, and there's no chatter issues unless you step to an aftermarket one. Pretty much any 75w90 will happily work, dino or synthetic. It's hard to go wrong with the rear diff. You can only go wrong with the tranny if the viscosity is off and the syncros don't like the friction level.

 

Nope. No gaskets.

 

A fluid pump from the auto parts store is a worthwhile investment for doing this too.
Also, clean off the magnetic plug before re-installing (you would have figured that out).