This is a Crawler Torque Converter that will let you crawl on idle RPM.
It is especially good for one that plays with Keyboards and doesn't have the sensitivity that game controller can provide.
All you need to do is use an automatic gearbox, select the Crawler torque converter, put it in low range, and let the vehicle climb by itself.
It recommended to use realistic gearbox (Q key to switch and Z & X to change between gears) so the vehicle will stay in Drive mode.
Also - This mod come with a 5.3L LS 320HP engine with high torque
And a Stage 4 Supercharger
And an Ultra heavy stage 1 long block
And a dual high performance radiators
all this combined provide more than 2000 HP