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Discussion Starter #1
The transmission works properly when I just start the car. After driving 5-10 minutes with gear shift at D position, the gear position indicator on the instrument cluster disappears. After a few minutes, it starts to appear S4 or S (it really goes in sport mode) with gear shift at D position. But it doesn't have any problem with manual shifting. So I avoid this problem by using manual shifting.

Can anyone tell me what is going on with my GM transmission?

Thanks
 

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E30M3 Race F10 535 R1150Rt M Coupe
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1,436 Posts
Spilled anything down into the shifter assembly in the console???
 

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Discussion Starter #5
UPDATE
after I disassembly my shifter, it shows nothing wrong, it works fine. is it possibly caused by incorrect transmission oil level?
 

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2004 325i automagic
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2,161 Posts
It seems unlikely that low transmission fluid level would cause it to change into sport mode from drive mode. You more likely would have shifting issues with low atf level. (Not saying that checking and even changing the transmission fluid is a bad idea.)

You should scan the EGS (transmission computer) with software like INPA to check for error codes.
 
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