52120000AA | Genuine Mopar® Transmission Solenoid

1. Control Gear Shifts

   • Opens or closes to direct hydraulic fluid to the correct clutch packs or bands.

   • Ensures smooth and timely gear changes.

2. Regulate Transmission Pressure

   • Maintains the proper fluid pressure for clutch engagement and disengagement.

3. Enable Automatic Functions

   • Works with the Transmission Control Module (TCM) to manage overdrive, torque converter lockup, and shift timing.

4. Protect the Transmission

   • Prevents damage by ensuring gears engage properly and avoiding excessive pressure or overheating.

Gears shift too early or too late.
Shifts may feel jerky or abrupt.

2. Delayed or Slipping Gears

Engine revs but the vehicle doesn’t accelerate properly.
Transmission may slip out of gear unexpectedly.

3. Stuck in a Single Gear / Limp Mode

Transmission may stay in 2nd or 3rd gear to protect itself.
Often accompanied by the Check Engine Light.

4. Transmission Overheating

Fluid flow mismanagement can cause excess heat, potentially damaging the transmission.

5. Check Engine Light or Diagnostic Codes

Codes like P0700, P0750, P0755, P0760, P0765, P0770 often point to solenoid or shift issues.

6. Poor Fuel Efficiency

Incorrect gear changes can lead to higher fuel consumption.