Technical > Dan Dishon's Transmission Den

leaking sealat shift shaft

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32bantam:
Hi Dan.......I'm asking this here because it may help someone else.
That shifter seal is still leaking in my trans. I have replaced it twice. Only leaks when fluid gets above the shaft.
So...do they make a "dual" seal or better quality? How about a speedi sleeve? I might be able to machine a thin sleeve for the shaft or maybe a o-ring? 
It never leaked until Hughes rebuilt it, so I'm at a loss as to what is going on.....
Thanks.
Merry Christmas

jeff/21:
the shaft might be loose in a worn case and leak when the trans is in park I have two trans that have to be repaired waiting to after Christmas to look at it should be able to sleeve the case

bikeguy307:
I'm wondering if it is leaking past the seal around the shaft, or around the seal at the case. If it's around the seal and seal with some sealant on it should help. Check the bore the seal rides in, maybe it was damaged when they removed a seal. A small gouge could be a path for fluid to leak. Some transmissions have an o-ring in the shaft bore. If a shop could go in the bore and cut a grove for an o-ring, that would keep most all the fluid from getting to the seal.

msundstrom:
I have had the same leak issue before and machine a groove in the shaft for an o-ring and still keep the original shaft seal. Never had a leak since.
Mark S

bikeguy307:
It would be easier to o-ring the shaft, but I would be careful to not go over board with the size and compromise the strength of the shaft.

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