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Old 11-17-2009, 07:57 PM
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Join Date: Nov 2009
Location: Belgium
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KTiM is on a distinguished road
GM transmissions compatible petrol/diesel 3.0 engine?

Hello,

I have a 'O2 X5 3.0L diesel (engine M57) with GM A5S-390R tranny.
Maybe I should feel a bit lucky after reading all those tranny's going crazy, cause mine failed completely only after 200.000 km .....

Disassembled the tranny out of the car yesterday, did a fluid drain and checked the pan/filter for wear. Fluid was black, pan/magnet/filter filled with a lot of metal (silver coloured) smurry.

In my search to rebuild it myself, I found a low milage tranny which is in fine working order. Problem is that this one is coming from a '04 X5 3.0L petrol engine (M54).

If I look into realoem, both models have the same A5S-390R tranny, but only the Alpha code (Diesel : -XF / Petrol : -YZ) and BMW order/part number are different.

Can latter be mounted onto my diesel engine?

GM Transmission identification codes on tranny green plate/tag regarding family (5L40E) are similar, only fabrication date and Alpha code are different.

Is there any difference in torque coverter, input/output shaft, external dimensions, other bell house dimensions ..... which could jeopardize this planned swap?

Transfer case for 4wheel drive output are different, but core attachmentto tranny looks the same, so replacing it won't be a problem.

Hope someone can help me on this one ....
Regards
KTiM

Last edited by KTiM; 11-17-2009 at 08:28 PM. Reason: My writing sucks....
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diesel, gm5l40e, pertol, transmissions


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