pinion seal

[joeyd161]

gonna change my pinion seal on the diff, my question is there a special way to change it because i read the trsm & hanynes manual and they say that i should check the the backlash in my diff is this really necessary. also is there a special way to take the seal out because in there it says to use a gear puller.

thanks

 

[mrnickleye]

Haven't done one on a Supra, but have done several on other Toyota cars and trucks. Mark the nut and pinion end so you know where the nut was before removing it. Mark the driveline and the flange so it all goes back together in the same positions as it came off, for balance. Once the nut and flange are off, you will see that you can pry the seal out with a big screwdiver, or seal puller (Sears, parts house, etc).
Tap in the new seal in a cross-pattern, say, 12 o'clock-6 o'clock, 2 o'clock-8 o'clock, etc. till its flush with the housing.
When tightening the nut, just go a tiny bit more than the original place where you marked it. This will be tight enough, and won't upset the backlash enough to worry about.

 

[joeyd161]

ill do that out while im changing my clucth, thanks for the info

 

[Supraholic]

I replaced my pinion seal one year ago.. i noticed the pinion flange where the seal ride on, had some grooves or scrach mark on it from seal riding on it.. i didnt think of it much.. replaced seal.. but few months ago, it started leaking again.. Now, i replaced the seal again, and the flange.. and no leak..

 

[mrnickleye]

Yep, if there is a groove worn where seal rides, it will leak again pretty quick. The same thing happens alot on the front crank seal. You can have a sleeve made and installed pretty cheap at an automotive machine shop. Just take the flange (or crankshaft dampener) to them. It gets pressed 'over' the surface with the groove, thus creating a new surface for the seal to ride on.

Also, I have had several flanges, both at the diff., and the bolt-on ones on 4x4s, and front crankshafts dampeners, leak from the nut/bolt area. The oil seeps down the splines/shaft and out from under the nut. I would clean the spline and threaded area 'real good' with brake cleaner spray, dry good with time, hair dryer, or shop air, then apply a generous ampunt of RTV to the splines, and under the washer before putting the nut(or bolt) back on.