44RE Tcc Solenoid 2000, new and ready to install. Fits the 44RE. Ships fast from the USA.
If your 2000-or-later 4.0L Grand Cherokee or other 42RE/44RE application cruises at highway speed with the tach a few hundred rpm too high, never seems to grab fourth, or keeps setting P0740 or P1740, the lock-up and overdrive solenoid assembly on the valve body is the first electrical part to look at. This is the new Mopar-boxed assembly, part number 52118500AB, with interchange numbers 12420C, TCS51 and 22954C. It is built for the 2000-on version of the RE harness and is the same assembly Chrysler used across the 42RE, 44RE, 46RE and 47RE.
The 44RE gets first through third gear from its main geartrain and governor circuit, and gets fourth from the overdrive unit bolted to the back of the case. Two coils on one bracket handle the electronic part of that. The overdrive coil makes the 3-4 shift. The TCC coil controls the converter clutch: per the factory manual for this family, lock-up is applied hydraulically and released when the TCC solenoid vents that circuit, and it engages in fourth, or in third with the O/D switch off, once the engine is warm and the vehicle is cruising on a level road. Both coils share one power feed through the round 8-pin case connector, and the PCM grounds each one when it wants it on. On 2000-up units the harness also branches out to the governor solenoid and the rectangular plastic governor pressure sensor.
Unplug the case connector and measure the two coils. ATSG lists 25 to 40 ohms for the RE-series overdrive and TCC solenoids, so an open or shorted coil is an easy call. With the engine running, check for battery voltage on the feed pin and watch the PCM ground each circuit. If the coils test good, look at the hydraulic side before you replace anything. Transmission Digest documented P1740 on 2000-2001 Dakota, Durango and Ram applications caused by an undersized orifice in the boost valve cover plate, and cooler restriction is another common cause of lock-up codes on this family. Our RE-series TCC lock-up guide walks through the lock-up checks, and the no-overdrive diagnosis guide covers the mechanical causes of a missing fourth gear.
This version is for model year 2000 and later. The dividing line is the governor pressure sensor: Sonnax identifies the early oval-connector sensor on 1999-and-earlier 42RE/44RE valve bodies and the rectangular plastic sensor on later ones, and this harness is made to plug into the later sensor. A 1996-1999 transmission needs the 1996-1999 solenoid and harness set instead. Because many of these units have been rebuilt or had a valve body swapped, the model year alone is not proof. Drop the pan and look at the sensor connector, or send us your year and VIN and we will check it. Everything else we carry for this transmission is on the 42RE/44RE parts page.
No programming or relearn is needed after this swap.
| Fits | 44RE 2000 |
| Part type | Tcc Solenoid |
| Condition | New |
| Brand | OEM |
| Reference | A518 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. It is a new Mopar-boxed 52118500AB lock-up and overdrive solenoid assembly with the internal harness. Interchange numbers are 12420C, TCS51 and 22954C.
No. 1999-and-earlier units use the oval-connector governor pressure sensor, and this 2000-up harness is made for the rectangular plastic sensor. Use the 1996-1999 set for those years.
Only when the solenoid or harness is the fault. If both coils read 25 to 40 ohms and get power and ground, check the boost valve cover plate orifice, cooler flow and the converter before replacing parts.
Both coils share one power feed and one case connector. A failed feed, a broken harness wire or a leaking connector takes out overdrive and lock-up together.
ATF+4, with a new filter and pan gasket. Check the level hot in neutral after the road test.
No. The assembly is a direct electrical replacement and needs no programming.
