I have just replaced the bronze bushing in the low-range transfer output gear, using Toyota p/n 90999-73089. This bushing is shown in factory diagrams for the early (pre ~1985 I think) split case transfers, but not in later examples. Mine is a 1989 from behind a 3B / H55F.
I have pressed the bushing in so that it is flush with the edge of the chamfer on the side of the gear with the shift sleeve teeth:
On the other side of the gear, the side with the thrust face that rides against the rear output shaft front bearing, the bushing appears to be oversized. I have knocked it in a touch to be sure that it will not ride on the bearing, but it come up past the cut-away sections in the thrust face lip:
Now, the question - are these cutaway sections there to facilitate bearing removal, or are they to allow oil to flow through the bushing? If it's oil flow, Should I carefully grind away (with a carbide burr, not abrasives) the obstructing part of the bushing?
For those who are interested, this bushing needs to be reamed (not honed) to size after installation - that's the next job when an adjustable reamer turns up.
Thanks
EO
I have pressed the bushing in so that it is flush with the edge of the chamfer on the side of the gear with the shift sleeve teeth:
On the other side of the gear, the side with the thrust face that rides against the rear output shaft front bearing, the bushing appears to be oversized. I have knocked it in a touch to be sure that it will not ride on the bearing, but it come up past the cut-away sections in the thrust face lip:
Now, the question - are these cutaway sections there to facilitate bearing removal, or are they to allow oil to flow through the bushing? If it's oil flow, Should I carefully grind away (with a carbide burr, not abrasives) the obstructing part of the bushing?
For those who are interested, this bushing needs to be reamed (not honed) to size after installation - that's the next job when an adjustable reamer turns up.
Thanks
EO