That's what I did. Gonna crack the pumpkin MAYBE this weekend. Gotta paint my calipers first. May have time to do both. It's supposed to be nice here both days.

 

My '04 is the same, but I HAVE to use Dino oil in the rear, don't matter anyway from a warranty standpoint, since I no longer have Mopar Gears in there anymore. Auburn Gear is VERY ADAMANT about NOT using synthetic in diffs where their LSD lives. (Believe me, they are big on this for some reason, I even emailed them to confirm this.) So I have 75w-140 Lucas, with the additive. I'll just change it at 15k instead of 30k to be safe. I have synthetic in the front though.
BTW: I have a nice shiny new chrome diff cover in the garage, waiting for another 6k miles, so I can put it on when I change the rear diff fluid...

 

Was talking to nypanama bout the 8.25, 10 bolt.

 

Alllllllright soanyone want to lay this all out for the dumb rook here? Haven’t done any of this stuff before, but I’d like to learn and do it all if I can. 15k maintenance is coming up. So I need to change out my front and rear end fluids. I was looking at the amsoil site and through my manual, but still not sure how much[/i] of what[/i] I need for the front and rear (and yes I have the LSD). I think I got the jist of it from the diy post on the rear end, but clueless how to swap out the front. Anyone care to elaborate?!?

I know these are what I’m looking at, again, just not positive how much I need?

1500 Model Front Axle (4X4) GL-5 SAE 75W-90 (MS-9763) or equivalent.
1500 Model Rear Axle Mopar_ Synthetic Gear Lubricant SAE 75W-140 (MS-8985). Limited-Slip
Rear Axles on 1500 Models Require the addition of 118 ml (4 oz.) Mopar_
Limited Slip Additive or equivalent.

 

im in the same boat as trex...just without the front bc i only have a 2wd. is there anyway of knowing if i have lsd? and just tell me what i need to buy...i know how to open it up and all thanks to the diy...but what oil....i was gonna go with royal purple..so if anyone can just tell me what i need....that would be great.

2002 btw.....12 bolt....9.25

how do i know if its LSD?

 

If you have, or get a build sheet it will tell you there, the one wheel peel is another giveaway. Or you can just crack the pumpkin in the AM before you go to get oil. You'll be able to see it.

 

Royal Purple is fine and I believe it has the additive in it already, so you're covered either way. When you have it open you'll be able to tell, because an "open diff" is, well "open"...

 

4 pints in the rear right? Youll want it to be 5/8" below the fill hole.

Don't rember the front, but buy more than you need cause the most pumps won't get all of the oil out of the bottle.

 

The manual said "DO NOT USE FRICTION MODIFIER" in our 04' 2500 w/limited slip 10.5" 14bolt. It said ONLY use 75/90 full synthetic front & rear & said it was filled from factory with full synthetic 75/90 front & rear. Our new 08' PowerWagon says the same.

 

i saw that the royal purple already had the additive....so get 75/90 gear oil from royal purple and ill be set....LSD or not? and when i open it what exactly am i looking for.....when you say "open" or not for LSD