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Old 11-24-2012, 04:37 AM   #1
Registered User
Join Date: Jul 2011
Location: Germany
Posts: 2,669
My Ride: 330iC
How to upgrade auto tranny?

hello guys,

iīm curious about all those forced induction guys running auto trannys and sometimes even run shorter diffs.

how to those guys prevent their transmission from going into limp mode at high speeds?

i dynoed my car (2002 330iCA with 3.91 diff) yesterday at 236hp in fourth gear were torque isnīt limited and when measured in fifth gear the transmission ecu lowers the power to 204hp.
thats exactly why the car feels awefull in fifth gear at speeds over 200km/h. It accelerates easily to 200km/h in fourth gear just to flatten out at 220 in fifth gear.

is there some tuner able to unlock this limiter? i really want to get rid of it
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Last edited by daniel_f.; 11-24-2012 at 04:39 AM.
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