smokeyram

Now that temps have dropped way off , i think about 9 this morning. when iam accelerating, truck will get up to lock up speed, bounce a few times then go into lockup. doesnt happen every time, actually less often than not.

This a cold, dirty TPS issue, or a converter issue. Im trying to keep this trans in one piece until spring so any help would be appreciated.

infidel

It could be your fluid is just cold.
Trans temp sender won't allow lockup until the ATF reaches 70F

OutlawStorm

Move the trans temp sender from under tha battery ,, extend the wires and mount it in the cab,, warms up alot faster this way,, and if you still have the same problem then it may be TPS

JKM

The trans temp sensor is not under the battery... It's in the hot line coming out of the trans.

The battery temp sensor is under the battery.

Get a 1K OHM resistor , unplug the temp sensor, and put the resistor between the contacts of the harness , and seal it up. This will tell the PCM that the trans is 100 degrees.

OutlawStorm

Not on my 96 2500 it isnt in the HOT line,, It is located under the battery on drivers side.. Was told that by both Dodge and 2 Trans shops.There is No sensor on the 47RE in the lines, as I had all my lines changed when Goerands rebuilt my trans in their shop! Some people just move it closer to the rad so it warms up faster .

infidel

Sorry Outlaw you were told wrong.
On a RE the tranny temp sensor is internal to the transmission.
The sensor under the battery is battery temp sensor which regulates the rate of charge.

torquefan

In addition to rate of charge, the battery temp sensor was used by the PCM to lock out overdrive operation below a certain ambient temperature. I believe it was -20 degrees. Not sure about the RE transmissions, but this feature was created in the early nineties on the RH transmissions. At Dodge, we did modify some of them to read warmer, after bypassing the aux. transmission cooler for the winter.

I don't think the battery temp sensor has any role in controlling lockup.

jdunmyer

I had trouble with my '94; the trans would drop out of OD or the converter would lock/unlock, sometimes every few seconds. The local mechanic plugged in his diagnostic reader while I drove the truck, and he told me that the trans temp reading was jumping all over the place, from 32 to 300+. After cleaning the connector at the sensor in the cooler line, right at the transmission and finding no improvement, I figured that it was probably the sensor itself. Took the easy way out and spliced a resistor into the harness, right next to the computer. Got the value from a table in the shop manual, picked one that tells the computer that the tranny is at 140 degrees. Left the connector unplugged at the tranny. Of course, I have to be a bit careful to not go too fast while it's warming up because the purpose of that sensor circuit is to prevent TCC lockup until the trans temp is above 60 degrees.