I am installing a mitchell steel flywheel dual disc clutch for sled pulling this summer. Since my truck is currently an auto i need to change the input for the t-case while i'm at it. I got a quote of $450 to exchange my 241dld t-case for a 241dhd transfer case already set up for a manual transmission! This is a great deal from what i have seen, i just wanted to know if this is necessary for sled pulling? I pulled a few times last year with the 241dld and had no problems but i wasn't running near the power levels i am now. I plan on putting at least 40 hooks on the truck this summer if all goes well. Matt