Input, output, and governor pressure sensors for 1999-up Dodge, Jeep, and Chrysler 45RFE/545RFE/68RFE automatics - fixes erratic shifts and speed codes.
This three-piece set covers every sensor the RFE family uses to see what is happening inside the transmission: the input (turbine) speed sensor, the output speed sensor and the line pressure sensor that many parts catalogs still call a governor pressure sensor. It fits 1999-and-up Dodge, Chrysler and Jeep applications with the 45RFE, 545RFE or 68RFE, which takes in the Ram 1500, Dakota, Durango, Grand Cherokee and Liberty, and the 68RFE behind the 6.7L Cummins in the Ram 2500 and 3500. If your truck is throwing P0715, P0720 or a line pressure sensor code, shifting erratically or dropping into limp mode, these are the first parts worth testing, and at this price the full set usually costs less than one trip back under the truck.
Chrysler describes the input and output speed sensors as two-wire magnetic pickups that generate an AC signal as the target teeth pass, mounted in the left side of the case. The input sensor reads the input clutch hub and the output sensor reads the park gear, and the controller divides one by the other to know the real gear ratio. It also compares input speed to engine speed to manage converter clutch slip.
The line pressure sensor is the third leg. It is a three-wire transducer threaded into the case with a 5-volt supply, a ground and a signal that Chrysler says should always sit between 0.35 and 4.75 volts. The controller uses it to check whether the pressure control solenoid actually produced the pressure it asked for. Because the RFE has no hydraulic governor, there is no separate governor sensor on these units; this transducer is the part that name gets attached to.
Sensors are cheap, but wiring causes many of these codes. Both speed sensors share a single ground, and when it opens the controller sees output speed at twice input speed in neutral and sets P1794; replacing sensors will not fix that. A loose line pressure sensor connector is another classic, and Chrysler's check is simply to press on it with the engine off while watching pressure on the scan tool. The full procedure, with the rpm checks and circuit numbers, is in our 45RFE speed sensor guide, and the pressure side is covered in the line pressure and PCS guide.
The listing cross-references 4799061AB, 4799758AD, 5016222AA, 72436, 72438, 72415 and 213-3214. Chrysler revised these sensors over the years, so read the number on your old part or compare connector and body shape to the photos before installing, especially on a 68RFE or a transmission that has been swapped. If you are not sure, send us your year and VIN. The full lineup of RFE parts is on our 45RFE collection page.
All three sensors are serviced from outside the case, so this job does not require dropping the pan unless you are doing a filter service at the same time. Clean the area around each sensor before removal so dirt does not fall into the bore, check that the old O-ring came out with the sensor, and lightly lube the new O-rings with ATF+4. Seat every connector until it locks, and top off any fluid lost with ATF+4. Clear codes and drive while the controller relearns. If you also want a fresh filter and pan gasket, our 45RFE sensor and filter kit bundles the same three sensors with a 4WD filter set. If codes point to the solenoids rather than the sensors, see the 545RFE valve body with solenoid pack.
| Kit Contents | Input speed sensor, output speed sensor, governor pressure sensor (transducer) |
| Number of Pieces | 3 |
| Fits | 1999-up Dodge, Chrysler, Jeep with 45RFE, 545RFE or 68RFE automatic |
| Replaces Part # | 4799061AB, 4799758AD, 5016222AA, 72436, 72438, 72415, 213-3214 |
| Dimensions | 4.33 x 3.54 x 1.96 in |
| Item Weight | 4.16 oz |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
One input (turbine) speed sensor, one output speed sensor and one line pressure sensor, also sold as a governor pressure sensor or transducer. Three pieces total.
The listing covers 45RFE, 545RFE and 68RFE applications from 1999 up. Confirm the number on your old sensor against the cross-references, since Chrysler revised these parts over the years.
No. The speed sensors mount in the left side of the case and the line pressure sensor threads into the case from outside. Expect to lose a little fluid and top off with ATF+4.
They live in the same heat and age together, and the kit costs about what many shops charge for one sensor. Still check the wiring and shared ground first, since a bad ground or connector sets the same codes.
Only if a speed signal is dropping out. If input and output rpm are steady and the ratio is simply wrong for the gear, a clutch is slipping and the problem is internal.
