Is there a seal I can get to plug the hydraulic leak from the gearbox?

Asked by Jun 05, 2016 at 08:11 AM about the 1994 BMW 3 Series 320i

Question type: Maintenance & Repair

I have a 1994 320i automatic. It had an ATF problem and changed the
transmission. It was well for a while until I noticed a hydraulic oil leak. I looked
underneath it and found what the picture shows.

Where the gearbox connects to the engine, there appears to have a leak.
When I took it for a diagnostic test, a crankshaft error reads out. I since bought
a lambda sensor and I'm yet to have this installed.

Kindly advise.

1 Answer


When you changed the transmission you replaced the transmission "front" seal Right? The Crank sensor normally causes a NO start or timing error, an 02 / lambda sensor reads and attempts to control stoichiometric fuel mixture.. wont correct a CKP sensor issue. Locate a proper service centre.

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