Tcase Output Shaft Bearings

[Guster]

Hi,

I recently purchased a transfer case rebuild kit and output shaft. I took the output shift and the rebuild kit to a machine shop to have them pull the old stuff off and press the new stuff on. He ran into a problem when trying to put on one of the bearings. It would go "too far" on and bind up the gear. Comparing the bearing to the original, the inside lip on the new bearing is not the same as the original. The original bearing part number is 30307JR-4 and the replacement part number is 30307J. Do I need to try and get the matching bearing part number from where I bought the rebuild kit?

Thanks,
Kevin

 

[djawahir]

I'm not sure if the different part number would make that much of a difference. But what I do know is that you can press the bearing all the way on and definitely bind the gears. You are supposed to leave a little bit of space between the bearing and the gear when pressing it on. I believe there is supposed to be between .010 and .025 inch gap. This is between the bearing and gear on both sides....

 

[Spike Strip]

Maybe this applies:

LINKY


Read down about half-way, post #20

 

[Guster]

Spike, thanks for the link. I did see that post so I checked the thickness on the two bearings. The two bearings appear to be exactly the same except for the inside edge. The funny thing is, the new bearing he was sent is the same part number of my original bearing.

If I press the bearing on and leave a little space between the bearing and the gear, is it possible for that bearing to eventually move and bind the gear? Pressing the bearing on and leaving a little space doesn't seem right but this is all new to me. Can anyone confirm that they did that when pressing this bearing on?

Thanks,
Kevin

 

[FJ40Jim]

You're correct, pressing on the bearing and leaving space is a bad idea. Eventually the bearing will walk into the gear.

The bearing should go hard against the shoulder of the shaft. If the inner radius of the bearing is too large, so the shoulder is actually going inside the bearing slightly, then things aren't gonna work right. It may be necessary to purchase the exact correct bearing from toyota.

 

[djawahir]

I'm assuming that you have the correct bearing...and if you do...

I got my info from the "Toyota Repair manual for chassis & body" (Toyota publication 36262E) and it does say that there should be a space between the bearing and the gear on both sides of the rear output shaft:

Manual Transmission:
Standard clearance 0.10 - 0.25mm
Maximum clearance 0.25mm

I don't know if it's going to confuse you more or less, but I rebuilt my transfer case a month ago and followed these instructions...

Also, because I'm anal retentive about certain things, I measured my output shaft thrust clearance before I took apart the output shaft and rebuilt the case and there was a 0.10mm spacing.