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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 01-06-2014, 10:33 PM   #1
Speed1gt
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03 325i zf5hp19 transmission leak! Help

Hello everyone I need help from the masters of this transmission. I just installed it and it don't leak fluid from the bell housing when idle. I also shifted to reverse for a while and drive a couple times while not moving and no leaks. Transmission is quiet normal. as I drive it runs good and smooth but then starts to drip fluid. not pour but just drip on floor Lil spots when I stop. So it only leaks when it's shifts into gears and drive around. What could this be. The seal looked good, bushing in pump look decent and converter shaft looked decent to. Any help would be cool thank you. Sorry I'm bad spelling everyone.
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Old 01-07-2014, 03:02 PM   #2
Speed1gt
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Old 01-08-2014, 01:46 PM   #3
HakenTT
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Originally Posted by Speed1gt View Post
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maybe because you haven't indicated from what location is the leak coming from. All you said transmission is leaking. assuming it is coming from bell housing area, if you haven't changed the pump seal at converter, it will leak, higher rpm will develop higher pump pressures thus the leak
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Old 01-08-2014, 07:09 PM   #4
Speed1gt
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Hi I mentioned bell housing but I should of bin more specific. yea the seal is new. Ok so if seal is new could the valve body pressure control selenoid create a leak or anything in the valve body.
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Old 02-27-2014, 11:57 PM   #5
tropos_net
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if you're on the ZF 5HP19, the atf pump outer seal would leak about the same time the torque convertor seal would. these are located just back of the convertor when its been pulled. the atf pump has bolts all around its perimeter as you look into the bell. so to remove that pump the whole gear assembly has to be remove from the atf sump/controller side.
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