Humming Noise and leak from T Case

[hotcorner216]

Well this all started about 5 months ago, T case started leaking quite a bit from the front output shaft seal, so I changed it, no leak for about 3 months, then it started leaking a again, I let the truck sit for about a month till I had time to change it, Changed it again with a different seal from a different part store, lightly hand sanded the yoke to make sure it was smooth and 2-3 weeks later started leaking again. Since the initial leak there was a humming noise coming from the T case only when it was leaking, I topped it off and it would hum on and off, T case is now humming again. T case was rebuilt by previous owners mechanic about 2 years ago. I do engage 4 hi and low at least once a month on a hill behind my home just to have it engaged and get the parts moving, always engages with not problem...

Any advise on fixing this issue?


besides bathing it in silicone...lol

 

[Richard86]

Are you sure that the front output bearing is ok?

 

[bushhawg73]

Is the humming noise only present when 4 wheel drive is engaged? When you replaced the front output seal, metal one, was there also a little rubber washer that fits inside the spline area on the yoke?

 

[hotcorner216]

Richard - I will check bearing

bushhawg- sound is present in both 2wd/4wd and yes there was a rubber seal

 

[bushhawg73]

I would also say to check the bearings. I did a little seal replacement write up a little while back where I had a leaking seal on my M1008. You should be able to find it pretty easy, it was about a month ago. In the write up I list part numbers and where to get some of the parts. I don't know if that will help you or not. Just a suggestion.