Upgrading the transmission - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
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#1 (permalink) Old 07-13-2008, 08:58 PM
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Upgrading the transmission

Hi amazing bimmers,

I need on your opinion on this . I have a 2002, 325XI. With the gas prices we see nowadays, I'm thinking of changing my transmission from 5 speed to 6. So I will get another gear to reduce the RPM.

Has anyone done this?
What was the effect? Did it work good?
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#2 (permalink) Old 07-15-2008, 07:39 AM
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Any idea?
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#3 (permalink) Old 07-15-2008, 10:04 AM
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Cool

i think you will have probs with matching the electronics. the difference in shift ranges will throw your DME in a loop.

and then... I am nt sure, but i believe the final drive ratios for the 5 speed and 6 speed are THE SAME. That is to say, you won't be saving gas with the intended mod.
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