Changing pinion shaft seal on rear differential of 91 4x4 Toyota ExtraCab

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Handyman - 28 Dec 2007 18:34 GMT

My pinion shaft seal just started leaking at 303,000 miles. I was
reading in the manual about preload torque on the pinion gear.
Anybody have any experience with this?? Mechanically it looks like an
fairly easy job. Thanks.

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Frank - 28 Dec 2007 23:48 GMT

I did mine in short order. had to get a very large socket, 31 or so mm

> My pinion shaft seal just started leaking at 303,000 miles. I was
> reading in the manual about preload torque on the pinion gear.
> Anybody have any experience with this?? Mechanically it looks like an
> fairly easy job. Thanks.

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Handyman - 21 Jan 2008 06:34 GMT

> > Mypinionshaftsealjust started leaking at 303,000 miles. I was
> > reading in the manual about preload torque on thepiniongear.
> > Anybody have any experience with this?? Mechanically it looks like an
> > fairly easy job. Thanks.

I did the pinion shaft seal over the weekend. 30mm 1/2" drive socket
and a standard socket wrench, one filed steel punch to open up the
ding in the pinion nut, one $10.00 seal, a strong standard screwdriver
to pry out the old seal, some 80-95 weight gear oil, a six in piece of
3" diameter PVC pipe to seat the new seal with, and 90 minutes of my
time. I removed the rear end of the drive shaft and suspended it with
wire, tapped the divot in the pinion nut with the filed punch to open
it up, scribed the nut position, then counted the turns as I removed
it. Pried the old seal out with a sturdy screwdriver, caught the
flood of gear oil, seated the new seal with the short section of PVC
pipe and a hammer, tightened the pinion nut the same number of turns
until the divot in the threads lined up with the key way in the
shaft. Checked the tension on the shaft and gear mesh for play,
remounted the driveshaft.

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