Replace the transmission range sensor on a 2014 Ram 2500 with 6.7L Cummins diesel engine to restore proper gear position detection and vehicle operation.

Warnings

Tools required

Parts

• Transmission range sensor × 1 — Mopar 5179267AA or equivalent
• Transmission range sensor O-ring/seal × 1 — Often included with sensor
• Transmission pan gasket × 1 — Use OEM specification if pan removal required

Fluids

• Mopar ATF+4 — 2 qt

Preparation

1. Park vehicle on level ground and engage parking brake
2. Chock rear wheels to prevent vehicle movement
3. Shift transmission into PARK position
4. Disconnect negative battery cable to prevent accidental starting and clear fault codes
5. Raise and support vehicle on jack stands if additional clearance needed for access from underneath
6. Allow transmission to cool to ambient temperature to minimize fluid loss and prevent burns
7. Place drain pan underneath transmission range sensor location on driver's side of transmission

Procedure

1. 1

   Locate and access transmission range sensor
   The transmission range sensor is mounted on the driver's side of the 68RFE transmission case, near the manual shift linkage. From underneath the vehicle, identify the sensor with its electrical connector. Clear any debris or road grime from the area around the sensor to prevent contamination during removal.
2. 2

   Disconnect electrical connector
   Press the locking tab on the transmission range sensor electrical connector and carefully pull the connector straight off the sensor. Inspect connector pins for corrosion or damage. If connector appears damaged, it should be replaced with the sensor.
3. 3

   Remove sensor mounting bolt
   Using a socket and ratchet, remove the single bolt securing the transmission range sensor to the transmission case. Keep this bolt as it will be reused unless damaged. Position drain pan directly below sensor as fluid will drain when sensor is removed.
   Torque spec

   Sensor Bolts15 Nm (11 lb-ft)
4. 4

   Remove transmission range sensor
   Carefully pull the transmission range sensor straight out from the transmission case. Some transmission fluid will drain from the opening. Allow fluid to drain into pan. Remove and discard the old O-ring seal from the sensor bore in the transmission case. Clean the sensor mounting surface on transmission case with brake cleaner and shop towel.
   ⚠Transmission fluid may be hot if vehicle was recently operated. Expect approximately 0.5-1 quart of fluid loss.
5. 5

   Inspect transmission case bore and rotor position
   With the sensor removed, visually inspect the internal rotor (attached to the manual valve shaft) for damage or wear. The rotor should align with the PARK position. Clean any debris from the sensor bore using a clean shop towel. Do not insert tools into the bore that could damage the rotor or valve body.
6. 6

   Prepare new sensor for installation
   Remove new transmission range sensor from packaging. Verify it matches the original sensor. Install the new O-ring seal onto the sensor body, lubricating lightly with clean ATF+4 transmission fluid. Ensure O-ring is properly seated in its groove and not twisted or damaged.
7. 7

   Install new transmission range sensor
   Carefully align the new sensor with the mounting hole and internal rotor position. The sensor will only install in one orientation. Push sensor into the transmission case bore until it seats flush against the mounting surface. Do not force - if resistance is felt, remove and check alignment.
8. 8

   Install and torque sensor mounting bolt
   Install the sensor mounting bolt and hand-tighten. Using a torque wrench, tighten the bolt to specification. Over-tightening can crack the sensor housing; under-tightening can cause fluid leaks and sensor misalignment.
   Torque spec

   Sensor Bolts15 Nm (11 lb-ft)
9. 9

   Reconnect electrical connector
   Align the electrical connector with the sensor terminals and push firmly until the locking tab clicks into place. Gently tug on the connector to verify it is securely locked. Ensure wiring harness is routed away from heat sources and moving components.
10. 10

    Refill transmission fluid
    Locate the transmission dipstick on the passenger side of the engine bay. Using a fluid pump or funnel, add approximately 2 quarts of Mopar ATF+4 transmission fluid through the dipstick tube to replace fluid lost during sensor replacement. Start engine and allow to reach operating temperature, then check fluid level with engine running in PARK. Add fluid as necessary to bring level to proper mark on dipstick.
    ⚠Transmission fluid level must be checked with engine running, transmission in PARK, on level ground, and at operating temperature (160-200°F).
11. 11

    Reconnect battery and clear codes
    Reconnect the negative battery cable. The vehicle may require a scan tool to clear transmission-related fault codes and perform a range sensor relearn procedure. Some vehicles will relearn automatically through normal driving cycles.

Reassembly

1. Ensure all tools and materials are removed from under vehicle before lowering
2. Lower vehicle from jack stands if raised
3. Verify transmission fluid level is correct at operating temperature
4. Check for leaks around sensor installation area after initial test drive

Verification

• Start engine and verify it starts normally (range sensor must detect PARK for engine to start)
• With engine running and foot on brake, shift through all gear positions (P-R-N-D) and verify instrument cluster displays correct gear position for each selection
• Verify no transmission warning lights or check engine lights are illuminated on instrument cluster
• Perform test drive and confirm smooth shifting through all gears and proper gear position display
• Recheck transmission fluid level after test drive with engine at operating temperature, running, in PARK
• Inspect sensor area for any transmission fluid leaks with engine running
• If equipped with a scan tool, verify transmission range sensor voltage readings change appropriately through each gear position (typically 0.5-4.5 volts depending on position)

More procedures for this vehicle