No only shift firmness and deley of torque converter lockup. We already have a relatively high stall converter. I've spoken with a number of performance shops about redoing our converters and they recommend that unless it has broken or you circle track or drag race a lot, there is little benefit to having it modified or changed.

And if you look at it from a pure labor standpoint to replace it, you are looking at well over $500 to drop the drive shafts, tod/transfer, and tranny w/ fluid. I have a spare converter if you really want to try it and an account with AutoTrans race division in Canada who I have spoken extensively with.