Fred the Farmer

Hey all,

I was wondering where the wires i need to splice into the switch are and how i need to splice them.

Thanks for any help
Garrett

dzl_damon

89-93 Cummins = NON Lock up.

Fred the Farmer

Well i know that but isn't there like 2 wires on top of the tranny you can hook up to a switch and it will like stay in overdrive or something like that?

dzl_damon

Overdrive is not lock up. It's a gear that spins the driveshaft faster than 1:1

If your tranny is no shifting into OD normally, first try cleaning the TPS which is located on top of the injector pump with 3 wires going into it (black, greyish, and orangish). Spray the TPS with contact cleaner (when taken off) and work it back and forth.

If this isn't working, and the tests in the sticky don't work, you can use a LINEAR (not the audio, logarithmic type) 5k ohm potentiometer. Hold the Potentiometer (pot) upside down so the rod is facing the ground. Line up the wires with the TPS on the injection pump and wire it up just that way. Send long wires to the cab and mount it there so you can play with shift settings on the fly.

Fred the Farmer

Ok i knew these trannies weren't lockups, but there should be some wires in a plug on the tranny which controlls OD, i don't know what to do with the wires, to control when it goes into OD.

dzl_damon

The sticky has everything you need to get your tranny up to snuff:

TPS adjustment:
http://www.pdrdiesel.com/oldsite/Tech1GTPS.htm
http://dens-site.net/Dodge_CTD/tps-adjust.jpg

Replacing the TPS with a potentiometer:
https://www.dieseltruckresource.com/d...ad.php?t=42003
Another writeup, but with pics:
https://www.dieseltruckresource.com/d...d.php?t=142641

Use a 3.0 liter V6 TPS instead of the $200 CTD TPS:
https://www.dieseltruckresource.com/d...d.php?t=202697

Controlling OD using governor pressure:
https://www.dieseltruckresource.com/d...d.php?t=156988

TV/kickdown cable adjustment:
http://dens-site.net/Dodge_CTD/Kickdown_Adjustment/

Band adjustment/line pressure adjustment:
https://www.dieseltruckresource.com/d...e-t265745.html

Fred the Farmer

Alrighty, thanks ya sir for all the help

DNRCustoms

two wires are poking up at the floor board. One is a blue wire which will be towards the rear of the truck and the front wire is a orange wire with a yen tracer. This will be the wire u ground out if u want to lock it in overdrive.