I've just clicked over 30k miles and figure its time to change out my diff fluid front/rear. Couple questions for you pros if you don't mind.
Is it worth going with Royal Purple? All I ever hear is good things. I don't mind spending the money if it'll protect my TJ.
Also, I know most people use a gasket maker type product.....anyone ever use an actual gasket? I saw these LubeLocker resusable diff gaskets. I hate messing with that RV silicone stuff and would rather use a gasket, but i don't want to have leaks either.
Royal Purple is no better than any other quality GL-5 gear lube, I sure wouldn't spend any extra money for RP. Valvoline, Havoline, Castrol, etc. are all very high quality gear lubes and will protect your diff gears as well as RP will.
Few like that overpriced Lube Locker once they buy it. You may not like messing with RTV but there's a reason that gear shops use it, it works well, it's inexpensive, and it doesn't leak. Permatex Ultra Black RTV works great, fits anything, and it won't leak. Plus you won't have to pay through the nose for Quadratec's OUTRAGEOUS shipping and handling for the overpriced LubeLocker.
I just changed all the fluids in my jeep yesterday. I used royal purple for the diffs. And it is alot less money than Mobil 1 synth 75-140 (costs $60 for 3 qts!) which is what the recommended fluid is for the rubicon diffs.
I also happened to use Lube Lockers for the very first time. Loved not having a mess and was super quick to do compared with the RTV. We'll see how it holds up but so far so good (no leaks). I have the rockCrushers diff covers with a machined surface so that may help against the leaks.
Just be sure to clean off all the old rtv gunk with a scraper. And if you can reuse the lube lockers I don't think they can be considered overpriced.
Meaning the faces were made to be perfectly straight?
Easy simple cheap way to do something like that is find a flat surface... table works.. find a big enough sand paper. Place it on the table laying up and then put the item on top of it and just sand away. since the table is flat and the sand paper is flat on the table.. it will sand away any rough surface and leave you with a nice and flat surface. I did that for the exhaust on my rc... works perfect.unk:
I changed my diff fluids about a month ago and used the lube locker gaskets. So far no problems. One thing worth mentioning is that about 5000 miles back I decided to install a Warn diff cover guard on the front and just removing the lower cover bolts and snugging the diff guard's bolts was enough to make the cover start to leak. I just lived with it until I changed the fluids. I've heard that this won't happen with the lube locker gasket. Just my .02.
FWIW-
Most shops don't recommend synthetic diff fluids for high performance applications. The factories use them because they allow for better fuel mileage. Any good 90 weight is a more durable fluid and used successfully with 9" Fords (which due to the hypoid gear angle is the worst for wear). A gear supplier that needs to remain anonymous used to work with the a Royal Purple Race car. The 9" wouldn't last until they changed out the RP fluid with STD 90 weight. Currie will not provide a warranty with their diffs if you use synthetics.
Many here will not be hurt by synthetics because of how we use our rigs. But, if you really are hard on your rig, use dino fluid.
I agree. I wonder how long it will be before Advance Adapters hangs up their agreement with Royal Purple that their Atlas II transfer cases come with now.
I'm not very hard on my TJ since its my DD....so I'll probably stick with synthetic...
So it sounds like the LubeLocker gaskets probably work just fine, but the cost may not be worth it. I guess I'll give it a shot and see how they work out. Worse case scenario I get a leak and wasted 40 bucks.
Remember to leave the top bolt in but loose when you pry the cover off. That top bolt will stop the cover from flopping in the drain pan and getting lube all over your face and front.
Sometimes straightforward info is so tough to find these days. I'm thinking I will just use whatever Jeep recommends for my Jeep's diff's. 30 front, 35 rear.
Can anyone give me an exact fluid that Jeep recommends? Brand, numbers, weights, whatever. I'm driving myself insane trying to find just a simple answer on the internet.
Jack Is the synthetic worth the extra? GM requires it in the new rear ends but I think it's becouse of there lockers I'm open F/R 30-35. Some guys sy no synth. and some guys swear by it. Does it really not breakdown as fast and run cooler? Also covers I know this has been gone over to death I'm going to get Front diff armour now Rock Solid Or just a Helment cover? Which is really better?
Not in the diff but in the transfer case the difference between the Mopar ATF and the Mobil-1 ATF was actually feelable with the hand. When I changed the fluid in my np231 to Mobil-1 atf it ran much much much cooler, after a 65 mile drive to NJ the tc was hot 'ouch' to the touch, changed the fluid there and drove home 2 hours later, tc was almost cool to the touch. It also shifts so much better into 4lo it's not funny.
When I went to Mobil-1 in the diffs I also noted that it seemed to roll better, sounds strange but that was what I first noticed. Had to go back to a dino lube in the rear when I put an auburn LSD in there, auburn said no synthetics. Still running mobil-1 in the front though.
My $.02 on it, I've put Castrol Synthetic in the Motor, Trans, T-Case and Diffs.
Seems the fluids are always cleaner then the regular counterparts whenever I change them.
Things like in the Trans and T-case seems like they shift easier in and out of gear changes.
Granted I've got a 2.5L on 30" tires, but A/C on in the middle of summer doing around town driving 20-21 MPG. Origionaly on 215/75-15's
Personaly I'll never go back to conventional fluids. I use Castrol because its not a "premium" like Royal Purple or as hard to find as AMSOIL. And if an emergency arises, punch a diff or a pan or a plug falls out, you can use the conventional equilivant till you can change the entire fluid again. Less of an issue because Castrol themselves sell blended versions of the same products.
So cooler running with synt. That sounds feasable so now, My 01 Tj Has the 231 T/C I belive its the strippy 2.5 TJ was afleet Vehicle in Tennasee before coming back to Cali. The fluid In t/c does get hot going into the mountains But it smelled like Gear oil not ATF.
It is supposed to be ATF, got into a rather heated discussion with a friend who is also a mechanic and it took a copy of my factory service manual to get him to button his lip
I'm not 100% sure about all the workings of the AW4, but they are kind of apples to oranges in the world of auto trannies. AW4 is an electronically controlled trans and 32RH is a hydraulic trans.
I've been putting this off for a long time now....so I went ahead and committed a sin....I let the Quick Lube place change my dif fluids cuz they offered me 2 for 1.....40 bucks to have them both changed out and I just haven't had the time to do it. THey used 80w90GL5K fluid, but on the printout it says they used 4.8 pints in the rear, and 5.25 in the front!
Would that much fluid even fit!?!?!? If that's true, am I looking at a problem?
They shouldn't of used that much fluid in the diffs., probalbly trying to rip you. I personnally will not take my jeep to one of those places again:flipoff:. They put the wrong kind of fluid in my manual transmission which caused grinding and when I took it back to them 2 days later tried to deny it. Luckily I saved my reciept and showed them. They then had to run to a auto store and pick the right stuff up b/c they don't carry it in stock.
On another note my grandma had them change her oil and they forgot to put in the plug so her engine blew going down the road a hour later. Do the stuff yourself and save some money and agravation.
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