Kenosha Warrior Posted April 22, 2007 Share Posted April 22, 2007 my diff is leaking fluid from the (this seems weird to me, as its not logical) the pinion. Right at the yoke, its leaking down and running down the underside of my diff. I lost maybe a shotglass worth of fluid lastnight. Obviously this requires a seal, bit I can't exactly replace that myself. so my question is. What kind of fluid does a D35 in a 1989 MJ require? Link to comment Share on other sites More sharing options...
aemsee Posted April 22, 2007 Share Posted April 22, 2007 Takes at least 80/90 gear oil, unless someone put synthetic in there. Seal isn't too hard to change, but a shop should only charge a max of one hour labor to do it, plus parts. Be sure yoke isn't too badly grooved, or seal won't , well, seal. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 22, 2007 Share Posted April 22, 2007 I have the same problem except worse...and I can't get mine off with an impact gun on the air compressor. time for a torch to heat it up...i gotta get it fixed, it's leaking the real nice synthetic gear oil...which makes me sad. Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 22, 2007 Author Share Posted April 22, 2007 how do you get the fill plug off? just a 3/4 drive ratchet? I'm at work and haven't tackled it yet. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 22, 2007 Share Posted April 22, 2007 yea just a ratchet. i think it's a 1/2 but idk. i used a breaker bar Link to comment Share on other sites More sharing options...
aemsee Posted April 22, 2007 Share Posted April 22, 2007 Usually it is a 3/8 square drive, but I've seen some with a 5/8 square plug that you would use a wrench on. Link to comment Share on other sites More sharing options...
500 MJ Posted April 22, 2007 Share Posted April 22, 2007 Get a big old peice of pipe and let the leverage help you get the Spline nut off. Then when you put it all back on Ive heard that you need to buy a new nut because its a crush nut. People locktite them on as well. A few days before you are ready to do it, soak it with penetrating oil. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 22, 2007 Share Posted April 22, 2007 haha, i don't have a few days. and I have a set of 1" drive tools for use on semi trucks...the ratchet has extensions up to 5' in range, i couldn't get it loose with that. torch. colton, I'd say to pay to have it done. Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 22, 2007 Author Share Posted April 22, 2007 haha, i don't have a few days. and I have a set of 1" drive tools for use on semi trucks...the ratchet has extensions up to 5' in range, i couldn't get it loose with that. torch. colton, I'd say to pay to have it done. oh yes, I'm going to. I'm just going to get a good supply of diff oil and keep topping it up. I called the shop I use and they said they could squeeze me in Friday and I could get the truck back Saturday, yet I'm going to my girlfriend's for a big BBQ saturday Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 22, 2007 Share Posted April 22, 2007 hahaha, yea you need the truck so you can get some good use outta the truck on sat. Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 22, 2007 Author Share Posted April 22, 2007 hahaha, yea you need the truck so you can get some good use outta the truck on sat. what, laying drunk in the bed? hardly dude. That's why we're going there. Nice comfy bed haha. anywho, 80w90 gear oil will be on my supplylist for a week or so :mad: Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 22, 2007 Share Posted April 22, 2007 I use synthetic amsoil 75 w 90 i think. I run full synthetic on everything, unless I have an aw4...in which case i use regular tranny fluid as the aw4's typically blow with synthetic, no idea why Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 22, 2007 Author Share Posted April 22, 2007 a bottle of 80w90 gear oil (bought it at the local Heep dealer, open sundays.) for $3 for a jug of 1L. I can't care for synth. everthing else is dino anyway. reminds me, need to swap lube in my trans. Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 22, 2007 Author Share Posted April 22, 2007 christ.. no need to worry about what was in there. it was literally bone f*ckin' dry. Took close to an entire bottle of 80w90 and the fill plug was in by 2 threads, I undid it with my fingers. so hopefully this is where my leak is from Link to comment Share on other sites More sharing options...
87manche Posted April 23, 2007 Share Posted April 23, 2007 yeah, but if it was the fill plug you wouldn't see oil on the front underside of the axle. Oil doesn't flow up. it's likely the pinion seal, it's not hard to replace, unless you get hosed and can't get it off. http://madxj.com/MADXJ/technical/techni ... nSeals.htm Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 23, 2007 Author Share Posted April 23, 2007 wow man, thanks. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 23, 2007 Share Posted April 23, 2007 lol, it could be the drain plug IF it starts leaking from the drain plug, then he parks the truck facing downhill...the oil could potentially follow the contour of the axle before leaking off.... damn physics. Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 23, 2007 Author Share Posted April 23, 2007 It was both :eek: I stuffed the truck on some stands today and got underneath, the little rings that hold the DS ujoint to the yoke were loose, the pinion nut was loose. So that makes 4 things loose. Fill plug, pinion nut, ds brackets and the entire diff cover (checked that lastnight) Link to comment Share on other sites More sharing options...
87manche Posted April 23, 2007 Share Posted April 23, 2007 lol, it could be the drain plug IF it starts leaking from the drain plug, then he parks the truck facing downhill...the oil could potentially follow the contour of the axle before leaking off.... damn physics. have to be an awfully steep hill to get up to the pinion. but you're right, I didn't think about parking on a hill. Link to comment Share on other sites More sharing options...
87manche Posted April 23, 2007 Share Posted April 23, 2007 It was both :eek: I stuffed the truck on some stands today and got underneath, the little rings that hold the DS ujoint to the yoke were loose, the pinion nut was loose. So that makes 4 things loose. Fill plug, pinion nut, ds brackets and the entire diff cover (checked that lastnight) start looking for a new axle. If the pinion nut was loose that means you were running the axle without the correct preload on the bearings. It's incredibly likely that you've drastically cut the life of them short. prepare for the worst, hope for the best. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted April 23, 2007 Share Posted April 23, 2007 haha just buy the 4wd parts outta tatersalad and rebuild them ;) Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 23, 2007 Author Share Posted April 23, 2007 4.10'ed LSD 8.8 is being prepped to go in when the turdyfive goes. may go in early thanks '87 Link to comment Share on other sites More sharing options...
87manche Posted April 23, 2007 Share Posted April 23, 2007 4.10'ed LSD 8.8 is being prepped to go in when the turdyfive goes. may go in early thanks '87 i'm in the midst of the samw swap. after killing 2 D35's in a week. Link to comment Share on other sites More sharing options...
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