Re: Need help Dana 44

Posted by jimg.allentown on April 12, 2020 at 13:05:49 from (24.115.193.250):

In Reply to: Re: Need help Dana 44 posted by racered57 on April 12, 2020 at 12:21:15:

First thing is that the pinion depth is a function of the housing - not the bearings.

It has been a while since I set up a Dana, but as I remember it, there is a shim behind the pinion bearing that sets pinion depth. Pinion depth is measured by using a set of measuring blocks in the bearing bores in the housing and putting a dummy carrier in place of the carrier that has the ring gear on it. Then, the dimension is taken from the dummy carrier to the measuring blocks. Then that dimension is converted by a table to the required shim for the pinion. Then, if there is a marking on the pinion like +1, -1, or something like that, that number is added or subtracted from the shim for the pinion depth. The bearings do not figure into this as they are precision made to a specific dimension.

Next, the shim stack between the bearings is used to set bearing preload.

This setup method is correct for highway use vehicles. A 5mph terramite should be quite forgiving if the pinion depth is not exactly correct. After all, what is the result of incorrect pinion depth? Potential gear whine? And at what speed? Even if those gears howl out loud, it would not start until way faster than this terramite will ever go. It will not cause excessive wear or stress on any of eth components.

Bearing preload would be more critical to bearing life.

I have set up a few rears in my days. Dana rears were always a bit of a pain because of the way they are put together with the carrier shims inboard of the carrier bearings. Also, rounding up the necessary fixtures in a dealership environment is a chore in itself. Many of the mechanics are too intent on beating the flat rate to put things away after they use them. Makes it a real treat to round up the tools you need for the job at hand.

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