Dana 30 axle play

There's no accurate way to measure backlash with the method you used. Other than rotational play, is it loose up and down or side to side? BTW, looks like your pinion seal has been leaking.

It is only loose rotationally. No up-and-down or in/out.

And you are correct about a leak in the past. But now there’s a new seal and everything is holding nicely. It looks suspiciously clean, though.


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My experience with pinion seals is that when they start leaking, there is usually a bad bearing or something like that to blame.
A new seal will hide the problem for a while, but it usually returns.
 
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