What to do to get a quicker launch...

fishy68 said

There is an adjustment for the main line pressure and it shouldn't be adjusted without gauges hooked up to the line pressure and servo pressure outputs then going through the sequence described in the factory service manual in which to test/adjust it. You can blindly crank it up but you never know how much affects it and if you go too much it'll start popping seals or cause overlap between gears which is bad. I recommend installing a Trans-go shift kit before cranking the pressure up.

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I would recommend a shift kit first also. most shift kits you buy tells you to adjust this pressure when installing it and they tell you how many turns to make. My uncle worked in a trans shop for a while and my old auto mechanics teacher showed us this trick, he is a Mopar guy. That is where I got the info from, I know you don't turn it much, maybe a quarter turn or less to start with. I need to ask him again. My uncle did it to his Dart and I think he did it a couple times till it was where he wanted it. It is common for some shops to make small adjustments to older trannies to get more life from them. I've done it a few times to older trannies, if you have one that is on it's last leg, it will last a lot longer.