Papabear, this is one of the two ways you can increase your line pressure. The other is by jumping a resistor between the EPC wire and the main current feed wire, supposedly it works good but it did absolutely nothing for me. What me and Marq have done is to cut the wire for EPC solenoid , and install the resistor inline. Marq lengthened his wires so he can mount a variable resistor in his cab where he can play with it as he pleases, where as I attached bullet connectors on both ends of the wire at the cut, I also install bullet connectors on the resistors as well, then I simply plug two ends of the EPC wire into the resistor's connectors. Marq can adjust his on the fly, I do it by crawiling under truck and swapping out the resistors. So far my experience has been that the 100-ohm resistor makes for very hard shifts, the 50-ohm one is better but still a bit harder than I'd like it to be, and the 10-ohm is yet to be given a test drive.
Things to consider before doing this mod:
- heat, lots of it - higher line pressure makes for high shear in the ATF molecules, which generates more heat - you need a big cooler, and I actually run two.
- if you tow, depending on what setting you're at your u-joints may hate you.
- if you ramp up the line pressure too high, you may starve your converter lockup clutch, which can burn it up.
- supposedly a tad bit lower fuel economy.
That's all for now, Marq can more info as he's the one with the E4OD books and stuff, and I'll snap a pic of my setup one of these days.