Pinion seal leak...

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1980FJ40

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Jun 25, 2003
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Well, I was under the cruiser today working on power steering and I noticed an oil leak line from the pinion running down to the bottom of the diff. How hard are these to fix? Could it be something else? ??? Thanks.
 
F

FJ60

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Jun 27, 2002
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270
you could retighten the pinion nut and re-stake it but this is only a temp fix, you need to get it fixed before you get slack in it and ruin the ring and pinion (like I did) :(
 
60wag

60wag

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Be sure to properly stake the nut when done - very important! Also you might want to smear a bit of silicone caulk on the splines inside the companion flange before you push it on. This keeps oil from leaking through the splines.
 
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1980FJ40

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Jun 25, 2003
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Thanks guys! If it isn't one thing, it's always another! :D
 
cruiser_guy

cruiser_guy

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I have the same thing on my BJ60 :'( I was able to unstake and tighten the staked nut about another 1/8 turn before I hit 140ft/lbs torque again. It wasn't making much noise but I've had my truck for nearly 15 years and I know how it's supposed to sound. How much time do I have before I need to do this? I was just in the axle last month to replace a leaking axle seal so I'm not too anxious to go back in :( Besides bearings, seals and gaskets are over $200 (2 pinoin bearings, 2 carrier bearings, pinion seal and diff gaskets).
 
theferg

theferg

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[quote author=cruiser_guy link=board=1;threadid=5112;start=msg39624#msg39624 date=1063160644]
...Besides bearings, seals and gaskets are over $200 (2 pinoin bearings, 2 carrier bearings, pinion seal and diff gaskets).[/quote]

You might be better off looking for a used low-mileage complete diff for that price. Unless your good at settin' up gears I guess... Anyway, I just traded both of my stock 3.70 diffs off--but they were in EXCELLENT condition for bein' outta a 1984. No play or leaks at all. I'm sure there are more in better condition... Just my opinion anyways...
 

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