Rear axle seal leak...round 2 after 3K miles - Ford Powerstroke Diesel Forum
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Old 07-24-2014, 07:11 AM
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Rear axle seal leak...round 2 after 3K miles

2003 f350 srw 2wd

Last month before taking a road trip I decided to replace the rear axle seals on my 10.5 diff. Bought all the parts...pads, shoes, seals, etc..

I followed the instructions from Welcome to camodown's Rear Hub Seals and Parking Brake repairs and it seamed pretty straight forward.

The seals that I used were Timken 370247A . They appeared to be a (2-part)seal-inside-a-seal type...like the outer seal would rotate inside the inner part. The seal fit snug inside the hub and I just tapped it softly with a small hammer around the perimeter to bottom it out.

My question now is: Has anyone in the past had this same issue that re-occured so quickly? Shound I have used some RTV or something else on the seal where it contacts the hub? Or RTV on the axle shaft where it contacts the inner part of the seal?...That is, if this seal rotates as an assembly....I don't know...???

Thanks in advance..
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Old 07-24-2014, 09:10 AM
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Just an after-thought....When I bought the truck, the PO had just a straight exhaust pipe which ended near the back door (crew cab). I had a new 3" in with dual 3" outlet muffler laying around and installed that with 2-custom turndown outlets. The closest turndown to the passanger hub (the one leaking) is about 18", and turndowns are around 12" forward of the diff. but lower than the diff.

I read these axle seals are rated to 400deg....Could this exhaust be too close to the diff. causing this leak? Last week I was driving through the mountains pulling around 7K pounds...
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