Re: Bits of brass in a 32 900 differential

Posted by Thomas Wilcox On 2011/4/23 22:00:44

Dear All,

I have found replacement bearings for:

Differential bearing assembly bearings (conical rolling, Timken 366)
Front Pinion Bearing (SKF 6908) (Thanks Dave!)

Unfortunately, I cannot find a replacement bearing for the front pinion bearing, SKF I-70268 (OD: 55.6 mm, ID: 23 mm, W: 22 mm). The rear pinion bearing Dave has listed has an OD of 62 mm and an ID of 25 mm. It would seem the 901 and the 900 had a different rear pinion arrangement.

Does anyone know of a bearing that will work?

I took apart the differential gear, and removed the ring gear. I am very glad I did, as there were a ton of brass shavings under the ring gear (see first photo).

In cleaning up the gears, I noticed that one of the differential planet gears had a large scar on the inner bore (second photo). It looks very clean, with straight, but not parallel, edges. It does not look like the sort of scoring one might see from over heating or sharp debris. Does anyone have any theories?

Lastly, upon reassembly of the differential gear housing, the gears would no longer turn. Is it possible that I applied to much torque to the inner housing nuts (third photo)?

Thanks tons, as usual, for your help!

Tom

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