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Replacing the Transmission Control Module in the 2003 Dodge Neon

In changing the transmission control module on a 2003 Neon, 2 different programming procedures are used. It can either be the DRB III scan tool or the Chrysler’s Diagnostic Readout Box. In the first procedure, it works with the control module so that the speedometer is functional. The other procedure works with the transmission’s shifting points. These procedures are essential to ensure that the transmission is functioning properly.

In replacing the transmission control module, you need the following tools:

  1. Ratchet
  2. Memory saver device
  3. Socket set
  4. Floor jack
  5. Wheel chocks
  6. Jack stand
  7. Inch-pound torque wrench
  8. Foot-pound torque wrench


Park your vehicle and put the transmission in “Park” setting for automatic transmission. Following the instructions, install a memory saver device. Remove the negative battery cable. Steady the rear wheels then loose the lug nuts. Use the jack stand to give ample space for you to do the work, remove the hex-head screws and the splash field. Take the bolt that support the TCM harness connection and remove the TCM.

The first step is to tighten the screws of the mount and to have a new TCM. Put in the harness connector and make sure that the connector bolt is tightened to 35 inch pounds using a torque wrench. Once they are tightened, the plastic splash shield is installed. To avoid it from sagging, it is important to have support for the splash shield during the installation. Just make sure that you tighten the screws.

Put the wheel up and pull the jack stand to lower the Neon. Forming a star pattern, tighten the lug nuts to 100 ft-lbs then remove the wheel chocks. Put back the negative battery cable and tighten the cable nut to 75 in-lbs then disconnect the memory saver.

Tags: transmission control module dodge neon

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