Originally Posted by 01redcrew
Been thinking about trying to make a converter unlock switch for sled pulling only. What do you guys think. I think it would be easier on the 5r110 and shifting to second toward the end of the track. Could i please get some pros and cons if any. Thanks Brad
I know it's a year late, but did you ever get a switch setup? I just finished mine last night and it works great, although I have the switch to lock the convertor during a pull. TCC's typically don't lock during a pull and a transmission can still shift with the TCC locked. I pulled once last year, starting in 2nd and ending in 3rd and didn't get much wheel speed from that! So I am using my switch to gain the extra wheel speed in 2nd, so that I can start and stay in 2nd the whole length of the track and end up with more wheel speed than I would have if in 3rd with an unlocked TCC. This way the tranny doesn't have to shift, the TCC is not burning the tranny fluid, and I have addition wheel speed and RPM. Took it out last night and can get to 18-20 mph in 2nd/lo, which is good enough for me; would like 25, but 3rd would be too much for the power I am making. Also, found out last night that you would really only want to use the switch for sled pulling. In 4 low, with TC locked, and no load it is very difficult to be steady. The truck starts to buck very quickly (like someone new learning how to drive a stick) and I can see how you could break something very easily! If you still need info on the wiring and such let me know and I'll get the wiring schematic and pics up. You will get a trouble code, although the way it's wired the tranny will not go into limp mode or anything.