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I got the new yoke, new tin cover, and new seal installed last week, and I finally got a chance to drive it yesterday. I've got the usual grease specs on the axle from what was slung out of the slip joint in the driveshaft, but I don't see anything leaking from or dripping down from the seal...

After I saw this I went and looked up how they are installed and that's exactly what it looks like. I thought it was just some extra seal shield or something. I'd never seen one get installed so I didn't know what to look for. I've only found speedi sleeves installed on a couple things I have...

I worked on this leak again this morning and have what I hope is a positive update. I pulled everything apart again, and put a dial indicator on the pinion and it had no play. I couldn't even get it to register 0.001" travel when hitting it in any direction with a nylon faced hammer. So I don't...

I didn't put a dial indicator on it when I had it apart, but when I put the housing on without the yoke, I couldn't feel anything noticeable. Is there an allowable spec? I have looked through task 5-64 of TM9-2320-272-24-4 and didn't see a measurement for it.

I know the first post is long, but in it I mentioned that I have removed the spring style vent caps and replaced them with DOT air line tubing routed to a filter up next to the washer reservoir. I've verified that it is open. Thanks though.

Interesting, that's a trick I had not heard of before. I'll give it a shot next time I can work on the truck. I took it on a ~150 mile road trip this weekend and judging by the amount of oil under the truck and speckled on the back wall of the van body, it's not slowing down any. Thanks!

Thanks for your help, but I'm confident that's not it. There is zero groove on the yoke, and barely any polishing where the seal lips ride. You can still see the texture from the factory OD grind through where the seal rides. A yoke worn bad enough to have a groove could definitely cause leak...

I've been fighting some pinion seal leaks on the front pinion seal of the middle axle on my M923A2 truck, and am at the point where I'd like to make sure I'm not missing something obvious. My truck was a ~2011 rebuild at Kansas. When I got it, there was a very slow leak at the front pinion seal...