I am finally putting my "new" 14BFF together. It looks like leaks between the housing and the pinion support are fairly common. Is there any way to seal that area? Gaskets or RTV would throw off the pinion depth.
CK5
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14BFF Pinion Support Leak
- Thread starter BGKYK5
- Start date
i don't think leaks from that area are very common, if everything is clean upon installation there shouldn't be any leaks.
I wouldn't use anything like RTV. There is no gasket (because, like you said, the pinion depth shims are the only thing between the housing and pinion support.
I wouldn't use anything like RTV. There is no gasket (because, like you said, the pinion depth shims are the only thing between the housing and pinion support.
I was thinking about putting a tiny bit of RTV on the ID of the bore in the housing, but I figure the pinion support is a tight enough fit that it would just scrape it all off when I dropped it in.
There is a seal around the pinion in the housing, and it will dry out over time. If you have the pinion out, however, it's a good time to replace it.
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One time I put a 14ff together and it leaked from there. I couldnt figure out why until I took the pinion out and realized that I had bent and folded one of the shims over itself so it wouldnt get a good seal. I just bent it back to flat and bolted it back in with no leaks.
Fry
1/2 ton status
Its probably because your pinion support isn't flat/true. If you follow the pirate 14 bolt setup its probably the quickest way to cause a leak (clamping the support in a vise).
In reality it should have been designed to take an oring (it kind of looks like it should).
I had to spread a bit of silicone on mine, torqued it down and checked the backlash and contact patch and it was fine. It really shouldn't throw off your measurements, because once torqued down the silicone will be squeezed out and only sit in the low spots.
If I regear in the future I will purchase a new pinion support though (mine is pretty beat from rocks), as to do it right.
In reality it should have been designed to take an oring (it kind of looks like it should).
I had to spread a bit of silicone on mine, torqued it down and checked the backlash and contact patch and it was fine. It really shouldn't throw off your measurements, because once torqued down the silicone will be squeezed out and only sit in the low spots.
If I regear in the future I will purchase a new pinion support though (mine is pretty beat from rocks), as to do it right.
Yup clamped it in a vise - torqued on it real good too. Hmm didn't think about that warping the mouting face. I may try a little silicone. Worst case I double check and have to take it apart and wipe it off.
