you did not state which controller you have or what year it is but i will still say the answer will almost always be "never". you should never touch...
@aaronc7 So I have my tcu with corrected shift definitions.
However I'm getting a "Transmission: malfunction can continue to drive in D until engine...
The file that guy posted was absolutely NOT a factory stock file. The stock rev limiter is 6200rpm, the stock speed limiter is 155mph, and while the...