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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend> TH350 small leak from a pump bolt...?
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Topic Review (Newest First)
07-03-2012 09:57 PM
Dryden You're right! I just bolted up the pump, not knowing that they need to be sealed like that... Thanks for the info
07-03-2012 03:27 PM
ericnova72 Those pump mounting bolts are supposed to have a thin rubber coated sealing washer under their heads to prevent leaks.

Your leaker has either no washer, the washer is damaged, or the bolt is loose.
07-02-2012 01:47 AM
TH350 small leak from a pump bolt...?


My TH350 is dripping at a rate of maybe one drop a minute from a bolt hole in the pump!

I can clearly see, by positioning a torch properly, that the oil does not come from above the six-o'clock bolt - it comes through the bolt's threads.

Anyone got an idea how this can be? I bought the TH350 used, now it's in the car with everything hooked up...

Here's a picture to show what bolt is leaking... (not my trans)

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