Quote:
Originally Posted by Akura
Sorry, but I’m not sure I understood correctly… so are you saying that using first gear in our A10 (stock trans) cars, after they’ve been tuned, is actually harmful?
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Quote:
Originally Posted by arpad_m
It isn't harmful. Drag racers are looking to launch from 2nd gear, because it's much easier to get traction and you still have enough wheel torque to maximize it.
The 8-speed transmission (8L90) in the 2016-2018 SS allows you to shift up to 2nd gear with the car stopped, but for the 10L90, possibly only in later model years, GM seems to have changed the programming to disallow it.
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Correct, but its not harmful. It just wont ever go into 1st gear. With the 10 speeds, you can do second gear start, but you actually tune 1st gear out completely so the car will never shift into 1st. That is the only way I know how to do it.
Most of my guys flash the 1st gear lockout TCM file for the track only since they still want 1st gear on the street.