mar67655

I made one just like the sticky said bought all the stuff from radio shack using the same pins but i cant get it to shift .i know its not the overdrive because whwn i plug the tps in it still works any advice on what to do

DNRCustoms

you need to switch the wires around. make sure the middle wire on the potentiameter is the same as the middle wire going to the plug, then the outside two just need to be flipped around.. Just takes a few min to get it dialed in..

Jet100

Make Small Adjustments on the pot too...when you find the area that it works in you'll be fine....Mine works in the 9'clock position.

Richie O

I have read about this mod but I guess I don't understand how it works. Is the pot. just replacing the tps and works the same way. I understand what a pot is just wondered how that fix actually works. Sorry for bustin in.

Billut

As DNRCustoms and Jet100 said, I would add make sure your pins actually do contact: that weatherpack thing is a little deep and if all 3 pins do not contact, it won't work.
On a side note, switching the side pins will switch the range of your **** from higher rpm to lower and vice versa. Mine worked from 9 to 2, with 9 switching to OD early and 2 later

Jet100

The TPS is nothing more than a POT on our trucks that is controlled by the throttle...basically all we're doing is moving it inside the cab..... allows us to dial in the shift point of the O/D
Mine is set to shift at +/- 38 mph

Richie O

So the pot is talking to the pcm and the pcm is taking in info from the speedo also. Then depending on where the pot is placed it just changes the speed at which the pcm sends the ground signal to the od unit for it to shift. Is that correct??

Jet100

yup, pretty much! It does vary slightly with temp changes in the tranny. It will hold 3rrd gear a little longer when cold..Not so noticable now, but in the winter more so.