Need Help With Transmission Modding On The D-15

I am modding the D-15 and trying to increase the RPM the clutch stops at when accelerating from a dead stop with the regular Automatic 4-speed Transmission.

With the stock V-8 the RPM stops at 1679RPM (the torque converter action). I'd like to raise the RPM it stops at to get more torque from a complete stop.
(I don't want to increase the engine power)

But I've spent hours messing with the engine jbeam and drivetrain lua without success, does anyone know how to increase this? Or does the game control
this completely by itself?

Any suggestions would be hugely appreciated! Thanks!

 

I think it's the High shift down value, i remember i got it higher once and i'm pretty sure that's the one i changed.

 

Thanks! I'll try that.

 

It won't do what you expect though. The game doesnt simulate torque converters. It simulates an automated clutch. All it will do is introduce more drivetrain slippage without offering any actual benefit.

 

It helped a little with climbing hills but for the most part it won't do anything.