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E90 320i Transmission Light
03-08-2019, 12:08 AM
Post: #1
sad E90 320i Transmission Light
Asking for a Friend,

So on his 320i Auto, he is having a problem when under load the box is kind of struggling to think and down shifts to 1st gear.

From my understanding it shouldn't do this. It was very intermittent before, but recently popped more frequently and now the transmission light appears.

Any ideas what could be the problem, car is 12 years old with 150000km. The box was never abused.

Recommended he go see Nico at ZF, but trying to troubleshoot in the meantime if anyone else had a similar problem.

Current Rides
2013 Audi Q7 3.0 V6 TDI S Line
2006 Audi A3 Sportsback 2.0T S-Tronic Ambition FRC ECU & S-TRONIC TUNED

(Ex BMW'S 2006 335i, 2006 X3 30d 2003 330i, 2002 325i 2000 540i, 1998 318i MS, 1992 325i MEX)
(NON BMW'S 2006 A4 AVANT, 2003 POLO 1.6, 2000 200 STI, 2000 RSI 20V, 1999 GTI, 1998 RSI 20V)
(1997 RSI 20V, 1997 MICROBUS, 1993 RSI T/C, 1992 GLI T/C, 1986 GLI T/C)
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03-08-2019, 03:39 AM
Post: #2
RE: E90 320i Transmission Light
Nico is his best bet for a proper and clear diagnostic of the transmission . He can also check the oil as well .

With the transmission , what I would do is , PC diagnostic to see if there are any fault codes , Check the oil , change oil and filter , Check for proper operation of the valve body / Mechatronics , clean out, check the solenoid filters or replace the solenoids if they are damaged, check the springs on the valve body as well . And make sure the valve body channels are clean and clear of any blockages , but that would entail taking apart the valve body. (Make sure you have a good manual for that particulate valve body , and a a new gasket . They tear up .

Also check the wiring , the wiring that goes to the valve body from the car , those get brittle and fall apart.

For parts , I would use allomatic transmissions , they are based in Jhb somewhere .

Current Cars
16 BMW F30 320i B48 LCI Automatic
02 BMW E46 318i N42 LCI Automatic
93 Mercedes Benz W124 E320 4 Door LCI Automatic
88 BMW E30 320I M20 LCI Automatic

Old cars
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