Transmission Problem???

[TBielawski]

Have a 95 Dodge Diesel with automatic transmission. Last year while driving felt like TC slipping. Engine would rev from 2000 to 2500 rpm but speed would not change. Would happen intermittenly. Mechanic changed OD selonoid-no help. Then he rebuilt transmission-no help. Then this summer transmission was fine went to SW from NY. Came home and problem started again. I changed out speed sensor and transmission thermostat-no help. Changed oil-no help. I did figure out that this problem only happens when outside temperature gets below 60F. That is why it didn't happen on SW trip-temperatures were above 80 always. Then on trip to Pa it started because it was cool. Next morning it was above 60F and no problem for 200 miles. On way home the evenig got below 60f and it started again. Anybody have any ideas of what can cause this. Even when it happens it will happen only once or twice over 20-25 miles then other times it will happen 5 or 6 times and then go away for 50 miles or so. Driving me nuts!!!!!

 

[RBratby]

it might be your tps. take your tps off and clean it. hope this helps.

 

[CarlJensen]

Might be the transmission temp sensor located at a line mount on line going to cooler. Stick a resistor in it and see if the problem stops. I think it's a 7000 ohm resistor to tell the PCM that your transmission is at 100 degrees. Sometimes it can be wire problem but it sounds like it is temperature related. The resistor goes into the harness plug going to the PCM, tape it in.

 

[TBielawski]

Tps

it might be your tps. take your tps off and clean it. hope this helps.

I've heard cling the TPS could be the solution. Where is the TPS located??

Thanks,

Tom

 

[TBielawski]

Tps

it might be your tps. take your tps off and clean it. hope this helps.

I've heard cleaning the TPS could be the solution. Where is the TPS located??

Thanks,

Tom

 

[TBielawski]

I di change out the temp switch in the transmission cooling line but there was no change. Suppose it was possible that the new one is defective but it acted identical to the old one-engine reving up at odd ball times. Will try the resistance check.

Thanks,

Tom

 

[CarlJensen]

The TPS is located left side of engine on the end of the spring loaded throttle return mechanism. Look at the injector pump and down a little to the rear of it. It is mounted with two screws and has a small connector. Pull the screws and pull it off the shaft, disconnect plug and you have it. I clean mine with contact cleaner or brake cleaner. Make sure to inspect the connector for crud/corosion and wear. Put it back on with dielectric grease to seal crud out of connector. Pull TPS wires out of harness going to TPS and route seperately. Hope this helps. Go to link on "First Time Cummins Owners" for a drawing of where things are.

 

[TBielawski]

Thanks for the location information and the site link. Will get the cleaner and grease tomorrow and hopefully teh problem can be solved!!!

Tom

 

[TBielawski]

Thanks for the location information and the site link. I will get the cleaner and grease tomorrow and hopefully the problem will be gone!!!

Thanks,

Tom