rattlewagon

87 runner, manual hubs with 95 4.56s V6 ADD diffs in it. Put them in last december, went great all winter. One day while crawlin around my local mall, I noticed a puddle under the front of my the truck. Smelled it, its gear oil.

Now its coming from where the passenger CV goes into the housing. I thought it was just a bad seal until I got underneath it. Where the flange goes into the diff has a pretty bad wobble to it, explaining the leak, but complicating things a little more.

Its been this way for a little over a month, Just havent had time to get under it again. Im still DDing it, but in 2wd with the hubs unlocked, Im not hurting anything, so not worried there. Just like to have my 4wd back again.

So I guess my question is does the seal do anything to hold that shaft in place, or am I looking at replacing the carrier bearings?

I know there are other threads on here about this, But I couldant find them. Any help would be great. Thanks.

BMcEL

I've been meaning to look into this as well. Mine's not leaking yet but there is what seems to be excessive play on the passenger side. I'll probably end up doing an SAS before I put any money into the front diff but my guess is the excessive play is what destroys the seal.

FSM sheet here.

Edit - the driver side has an extra bearing for the output shaft, reducing axial load on the driver side carrier bearing. I wonder if the difference in axial force between passenger/driver side carrier bearings has anything to do with this?

highonpottery

iTrader: (1)

which plane is the wobble in and how much travel does it have? on ZUK's website, he says there should be a slight bit of horizontal play (in/out), like 1/8" on a normal diff (ZUK)

there is a circlip/snap ring that "holds" the axle in the carrier and that could be worn/deformed, allowing the axle to move excessively in the horizontal plane thus causing a leak in the seal. otherwise, the carrier bearing could be worn, and since the splines of the carrier/axle are in full contact, this could be the cause of a wobble in the vertical plane. either way you're going to have to open her up and take a look.

i think there is also a set of needle rollers that make contact with the axle shaft - these could be worn/damages as well, causing excessive play. https://www.yotatech.com/forums/f116...sembly-132092/
good luck!

rattlewagon

Movement is all vertical. Pretty sure the needle bearings are only on the drivers side.

HIP= Thats the thread I was looking for. I know I need to just take the cover off..... Just need to find the time to do it.

This pic is from that thread. I think the bearing right behind that seal is the carrier bearing....which means Im probably going to be replacing it. Balls. I know I need to just take the cover off..... Just need to find the time to do it.



Thanks for the quick replies guys.

Resto-noob

iTrader: (3)

Sorry to threadjack, but your Yota looks familiar. Think I picked up a hood from your folks' house in Royalton.

rattlewagon

That was me! Haha. Small world.

89yotarollaGTS

im having this same issue on my 93 right now.. an i also DD the truck an it sounds like she will be down awhile to get the "play" sorted out.. from what i get out of the links an here is i will need a new flange,seal,bearing an new fluid ? probly be wise to freshen up the other side as well ehh ?

am4x4

That is the carrier bearing that you are looking at. I highly doubt it is loose enough to cause that much movement in axle flange. The axle splines into the side gear so there could be play between the side gear and the carrier or in the splines themselves. Like others have said, the axle is really not very well supported and it is normal for there to be some slop. Over time the axle seal will harden and cannot flex enough to keep everything sealed up when the axle wobbles around. It could be worth your time and money to throw a seal in it and see if it fixes your leak before you dig deeper into fixing a non-problem.

TNRabbit

Shouldn't need to be down as a DD; you can pull the diff & still drive it~

89yotarollaGTS

well if i do pull the thing im not just putting a seal in it, an see if it takes care of the problem. This deffinetely isnt normal, & the clunking is whats driving me nuts..

im just curious what i need to do the job & how to do it correctly, if its just prying off the flange an pulling a bearing out an putting a new one in, then i can handle that.

BMcEL

There ya go...

Edit - use this one if you don't have ADD (auto-disconnecting differential).

rattlewagon

Your going to have to take the carrier apart to get at that bearing, which means setting up the gears when you put it back together.

But you can change the seal without taking the diff out.

am4x4

Exactly!

I think you might be confused about what that bearing does and how it is replaced. It is one of the two bearings that the diff carrier spins on, it does not DIRECTLY support the axle shaft. You would have to remove the front center section from the truck, remove the diff carrier from the housing, press the old bearings off and the new ones on, then properly set the gear backlash and carrier bearing preload. But backing up a step, you probably have a better chance of winning the lottery than finding a loose/bad carrier bearing on a factory set up diff, especially on a front axle. IF something has excessive play it is probably the side gear/carrier fit or the splines are worn on the axle and/or side gear. It is a fact of life that seals wear and harden and will need to be replaced every now and then, especially a seal that is working against an under supported part. If I am wrong you wasted a couple of hours, if I am right you saved a day or more of time and a bunch of money.

What is the clunking, you didn't mention it in you OP, do you hear something when driving or just when you grab the flange and work it around?

rattlewagon

Does anyone know where I can get that seal? My local auto parts store says they cant get it.

On rock auto im finding part number 9031135032. Anyone know if thats correct?

BMcEL

Dealership?

92dlxman

92 4cyl never opened (that i know of) clunks in 4wd while turning with any varyation in load, like coast to throttle or forward to reverse, no leaks. been blaming it on possibly worn c/v's (one outer boot is torn). when checking axle play do you get that excessive vertical motion with truck on the ground?

BMcEL

Rattlewagon - this diagram should have the part number(s) you need.



The dealership or https://www.1sttoyotaparts.com/ or http://www.toyotapartseast.com/ should have what you're looking for.

rattlewagon

Great! Thanks. Thats exactly what I was looking for.

Edit: I see that 41336g is the seal...but what is 41304p?

BMcEL

41336G is the dust cover, 41304P is the seal.

rattlewagon

Bmcel - any way you can post up a pic of that diagram again? Or a link to where you got it. It seems to have vanished.

Now that winter is almost here, I need to get this fixed. Haha.