Quote:
Originally Posted by Firedog
I am in the process of doing the same thing to mine!
What are you using to set the depth on the drum bushing?
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The bushing (from the outside machined surface) needs to be set at a depth of .190
The bushing itself measures .8275 in depth.
The bushing bore (depth) is 1.000 even.
The .190 is necessary to accommodate the thickness of the drum "thrust washer and seal" which protrude into the bore and butt up against the bushing.
To answer your question, I have a set of digital calipers (with depth finder). So it is a simple matter to tap the bushing into the bore and measure the depth at 4 points 90 degs. apart.
You just need to have the bushing in the bore "squarely" and at approx. the proper depth.
The drum seal measures: .1365 thick
The Thrust-Washer lip is: .0685 thick
So overall the two are .2050 thick. This provides about .015 "crush" on the seal when assembled.
Looking at it....it is hard to imagine that this measurement is ultra critical. The entire set up is designed only to contain the oil in a case that is "splash" lubricating the parts. Nothing is under anything much outside of atmospheric pressure.
Too, Warn recommends that you add only 6 ozs. of 30 weight oil. That will hardly even reach the seal.
I am going to use a blend of Mobil 1 gear oil and Marvel Mystery oil for a thicker lubricant (I live in a warm climate).
So, in summary: If you have a means to measure the depth of the bushing, it needs to be .190 or pretty close. If you don't ....tap it in (its not tight) until the opposite lip protrudes just inside the case and stop. This will put you very close to the .190 needed toward the outside of the case.
