Have a 99 dodge durango, hit a pothole today. minutes later "Transmission temp" light and "o/d off"light came on. had just got in the vehicle 5 minutes before i hit the pothole. Now these lights blink on and off every couple of minutes with a beeping noise. Two weeks prior I had a computer diagnostic done and the only alert was p0753a "shift solenoid". (automatic)Don"t have any problems shifting, the truck drives fine. Can you please advise?

SOURCE: Hello, I own a 93

The transmission is controlled by the Transmission Control Unit (TCU).

Throttle position, rpm, and speed are input parameters to the TCU. The TCU has a default set of shift patterns. These shift patterns change over time based on your specific vehicle setup and driving habbits.

The shift patterns are only slightly affected by driving habbits over many driving cycles. But, changing the relationship between the throttle position and the actual speed being reported by the speed sensor can have an immediate effect on shift patterns.

While your speedo may now be correct, the realtionship between rpm and thottle position has not been corrected. That would take a gear change in the differentials.

The TCU can be reset to an inital learn base line. When this is done, the TCU will instantly learn the dynamics of your setup.

Any shop with an advanced ODB scan tool can reset the the TCU. The dealer or a transmission shop would be preferable.

You really should change your differential gears as opposed to resetting the TCU

This information was posted by ftgiles here

Marvin

• 85242 Answers
• Posted on May 03, 2009

SOURCE: transmission shifting problem[automatic]

the next step is to have the service trouble codes run to see if any trans related codes pop up, here is how u do that, go to the link for instructions, let me know what u find if anything, but that is the 1st step in the further diag of this problem
http://check-engine-light-codes.blogspot.com/2006/04/chrysler-1985-95-obd1-code-self.html

SOURCE: 2001 dodge durango v8 5.9 trans won't shift unless i downshift

I have a 2000, there is a speed sensor located in top of the rear axel and I believe another on the tranny housing. Try the rear axel first.

Marvin

• 85242 Answers
• Posted on Jun 25, 2009

SOURCE: Transmission not shifting correctly

u have a shorted trans shift solenoid B inside the transmission

Testimonial: "Thanks, i am still having same problem even after changing shift solenoid B??? any ideas.."

SOURCE: where can i find neutral park switch and lock up

they are all in the one connector on left side of trans