Author Topic: Overdrive Question (Read 770 times)

Slotts · « **on:** July 15, 2010 - 02:51:47 PM »

Eric's 99 Dakota has a 318 4WD auto and noticed on the trip to and from Carlisle that it would only go into overdrive when first getting on the turnpike. Once in overdrive and then if it downshifted, it would not go back into overdrive. The check engine light is not coming on.

Thank you for any help.

Slotts

ntstlgl1970 · « **Reply #1 on:** July 15, 2010 - 03:11:38 PM »

First thing would be to determine if the computer is electrically commanding the trans to come out of overdrive or if there is a mechanical /solenoid issue in the transmission itself. Trans connector Pin 6 (brown wire) is the one for the overdrive solenoid. The computer will ground the brown wire to energize the OD solenoid. Should be pretty straightforward to check this with a DVOM.

Slotts · « **Reply #2 on:** July 15, 2010 - 09:20:10 PM »

Quote from: ntstlgl1970 on July 15, 2010 - 03:11:38 PM

First thing would be to determine if the computer is electrically commanding the trans to come out of overdrive or if there is a mechanical /solenoid issue in the transmission itself. Trans connector Pin 6 (brown wire) is the one for the overdrive solenoid. The computer will ground the brown wire to energize the OD solenoid. Should be pretty straightforward to check this with a DVOM.

Thank you very much for the help and I will look into this. I appreciate it.

Slotts