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Shayne Cryderman

Shayne ... 10/17/2018

2003 BMW 745i Base 8 Cyl 4.40L

Transmissions & Drivetrains

Transmission questions

Bought a 745i, notice a wet cover over the tranny pan. Car grips onto 2nd kinda hard. When coming to a complete stop, it feels like I've been rear ended. Sometimes it takes a little longer to go from 1st to 2nd. Got the code P0730. Help would be lovely!

1 Answer


Jimm 1/1/2019

P0730 Incorrect Gear Ratio = the difference between the input speed and output speed (speed of the vehicle) is more than 10% above the gear ratio for more than 5 seconds.

You should first try to look if the solenoids are working properly. Check the transmission solenoid's wires and harness. Check the entire harness. Maybe you will have to remove the Trans oil pan to see the solenoids. There is also an access plate on the transmission which can be removed for inspection.


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