86’ 4Runner Build and Help
Aug 22, 2018 | 06:28 AM
#1
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From: Central Mississippi
86’ 4Runner Build and Help
Aug 22, 2018 | 07:22 AM
#2
I'm guessing you put a new pinion seal in there. It's often recommended that you use gasket maker only for sealing the differential up to the axle housing. I like Permatex Ultra Gray. Clean up both surfaces good and it seals up great. Make sure the axle housing breather isn't plugged. It's the little valve looking thing on top of the axle housing just off center. It can be unscrewed and checked/cleaned.
Aug 22, 2018 | 10:27 AM
#3
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From: Central Mississippi
Everyone that’s done this before is pretty certain that my breather is clogged , I’ll start working on it here shortly. And my question is should I stand down both the housing and chunck sides ? Of course using really find sand paper .
Aug 22, 2018 | 10:59 AM
#4
I wouldn't think sanding the differential housing or the axle housing is necessary. Gasket sealer is pretty forgiving for uneven surfaces. What it doesn't like is oil, loose rust, or old gasket material. If the old gasket is super baked on there you might use a Roloc disk to get it off quick. Only problem with this is it throws dust everywhere.
Aug 22, 2018 | 04:17 PM
#5
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From: S. FL
I'm with arlindsay on this one. I've had my rear diff out several times and only ever used permatex rtv, never had a leak yet. I scrape the surface and clean with brake cleaner to degrease and then apply to both surfaces.
Aug 22, 2018 | 07:34 PM
#6
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From: Central Mississippi
Well we hit it with some fine sand paper to get the 32 year old gasket off it was the original one on there without a doubt . After 6 hours of everything tonight we finally got it back together and the Mopar gasket maker is holding perfect , unfortunately the pinion seal i replaced is leaking now , it’s not bad enough for me to put it out of commission (it’s my daily driver and I refuse to allow it to fail me even once ) so tomorrow I hope that my local orileys has another national brand seal as their name brand one isn’t snug against that shaft . I’m also worrying about the pinion but , I’m not sure what the torque spec is . I can’t find that anywhere , and when we put the new seal in I didn’t even see an old seal whatsoever . , unfortunately I didn’t get any pictures tonight I was rushing to get everything put back together because between work and this Toyota and hunting season coming I’ve been swamped .
Aug 23, 2018 | 02:20 AM
#7
There is no torque spec really. Check out GearInstalls.com for a lot of high quality write ups on Toyota differential setup. The pinion nut is as tight as necessary to crush the crush sleeve and achieve the proper pinion bearing preload. Unless you're replacing the crush sleeve, your final torque is going to be very low. Basically tighten it until there is a slight drag when you spin the pinion flange similar to setting up a trailer bearing preload then stake the nut so it doesn't back off. Loctite isn't usually needed but since you're not going to be getting the pinion nut very tight it might be a good idea.
The other option is that you actually replace the crush sleeve. It can be done, technically, without removing the differential from the truck. The problem is it's going to be really hard to tighten the pinion nut in the space you'll have under the truck. Crushing the crush sleeve usually takes me a breaker bar with a 3.5 foot pipe extension and lot of effort.
The other option is that you actually replace the crush sleeve. It can be done, technically, without removing the differential from the truck. The problem is it's going to be really hard to tighten the pinion nut in the space you'll have under the truck. Crushing the crush sleeve usually takes me a breaker bar with a 3.5 foot pipe extension and lot of effort.
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Aug 23, 2018 | 05:32 PM
#8
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From: Central Mississippi
Well here’s the update on my diff , got it all back together the truck runs and drives fine , no noise & is t leaking around the new gasket , come to find out after looking at that web page about the gears ; I left the old pinion seal on and put the new one on there so I’m running two pinion seals . It’s leaking where the pinion seal is so I ordered a new pinion seal and also a pinion nut from trailgear.com . I’m driving the truck because it isn’t leaking too bad at all .
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