Topic: T-Case Rear Output

[Duffil]

Ok, I just went out and greased the rig to get ready for a run I'm goin on and my rear output has about 3/16" to 1/4" of up/down and side/side play in it. I don't think the flange nut is loose because it won't move front/back, but I haven't pulled the D/S yet. So, to change the bearing/seal, can I just pull the rear 7 bolt cover, or do I have to yank the case apart? Maybe I should just build the case now since it'll be apart?  the front output seems to still be in good shape; there's no noticeable play in it.

[gturismo]

I believe that to get to the bearing, you have to remove the rear part of the case (10 bolts).  My flange moved up and down and side to side a little when I got the truck.  I tightened the flange nut and then it was fine.  It only took about 1/8 of a turn, or less to make it tight again.  Good luck.

[Marlin]

It is perfectly normal for the output shaft to move around because it rotates on two roller bearings.  The front bearing is a 6308N, and the rear is a 63/28.

If the output shaft was designed like the pinion in a differenial, it would use tapered Timkin bearings, which when properly adjusted, or preloaded, there would be very little or no movement. This would require additional labor and parts to set up the case, so Toyota chose the cheaper, more loose way of building the t/case.

To check the rear output flange, simply remove the rear drive shaft, and tighten the output flange nut.
You will need a 32 mm socket. Torque spects call for 95 ft lbs, and remember to restake the nut.
Reinstall the rear drive shaft and call it good.

[Duffil [OP]]

OK...cool, that'll save some work.  Thanks Marlin!!

[mad squirrel]

I just dual cased my 4-runner. My truck sets 8" over stock and has been SAS. I have this gnarly grinding/howl coming from either the furthest transfer case back or the transmission. I just replaced the tranny yesterday and I also replaced the furthest back transfer case. The sound is still there. I know many people with the same setup who drive around with no problems. What's the deal with mine? Is it my output shaft again. Coninsident-maybe. Driveline angle doesn't look to steep. Anybody have suggestions?