Engine/Transmission (1994 - 1998) Just bought a '96 Frankenstein.

[KOG]

It's got a 91. 5-93 engine (160HP). Transmission isn't particularly interested in shifting correctly. It will finally shift at full engine speed in each gear. I've gotten familiar with the 46RE in my 91. 5, but don't have any information on the 47RE that's in this truck (I think). Anybody got a '96 FSM to sell or know any other source for a complete wiring diagram for this thing?



You're probably wondering why anyone would buy such a thing. $800 with a good utility body is why and the Cummins seems to run just fine.

 

[Missouri Mule]

I think you have to adjust your TV cable (transmissions throttle valve cable).



Dodge or Geno's Gararge for factory service manuals (wiring diagrams included). Geno's is probably cheaper and you will get it faster.

 

[JackStone]

You might try this, it worked great on my 95.

95 Eliminating the TPS on Automatics

You need to get the following:
1)A 5K potentiometer, 1 watt rated. It should have three terminals on the back. I used a one turn pot, you can use a 10 turn if you want finer control.

2)6'-8' of 3 conductor 18 gauge shielded wire. The colors are red, black, and white. Don't use solid wire as it will tend to break easier. I couldn't find any of this so I used a red, black, and green 18 gauge automotive wire and made up a harness. The green was substituted for the white.

I mounted the pot in a small project box and secured this to the dash just to the right of the cargo light switch but you can put it any place you can get it to fit.

Run the wires from the TPS up to the dash. Cut the wires off the TPS leaving a few inches on the sensor. I used insulated push together connectors and on the end of the TPS installed the opposite type that were installed on the TPS wires. This allows the TPS to be easily reconnected should the need ever arise.

The Red wire will connect to the violet with white stripe, the white to the orange with dark blue stripe, and black to black. the violet is the 5V going to the TPS, the orange is the voltage that is leaving the TPS and the black is the ground.

Connect the white to the center connector on the pot and the black and red to the end connectors. If the pot works backwards, reverse the red and black leads. The black should be on the #1 connector and the red on the #3 if the leads are numbered on the pot you have. Seal the connections with dielectric grease to prevent corrosion.

After hooking up, set the voltage out of the pot to about 1 volt. On the pot I used, all the way off was at the 7 o'clock position and full on was at the 5 o'clock position. Setting the dial at 9 o'clock gave me one volt.

 

[KOG]

Hmm. That sounds interesting. I could have probably have used that on my 91. 5 IF the engine computer had been usable. On that one I've installed an OD switch on the end of the shift lever to bypass the defunct engine computer and bad TPS rather than spend $1000 to replace both.

Waiting for the FSM to show up before I start into trouble shooting the 96. Since I've already got a 92
FSM I should be able to figure out the mating of the older engine with the 96 transmission. If it can be done. The only real difference should be the TPS, but we'll see.