Complete solenoid block pack for Chrysler 68RFE, 45RFE and 545RFE units that fixes limp mode, harsh or erratic shifts and the P0750-P0760 solenoid codes.
If your Ram, Dakota, Durango or Grand Cherokee has started dropping into limp mode, holding one gear with the check engine light on, or logging a P0750-series solenoid code, the solenoid block on top of the valve body is the first assembly most technicians look at. This is a complete RFE solenoid block pack that replaces OE numbers 52119435AF, 5170877AF and 68002342AF, with listed cross references including 5170877AA through AD, 52119435AA, 68353383AB/AC and 68376695AA. The product photos show the white 23-pin pass-through connector with its green seal, which matters for fitment and is covered below. It is the pack only: no filter, gasket or fluid is included.
The 45RFE, 545RFE and 68RFE have no throttle valve or governor deciding shifts. The computer applies every clutch through this block. Sonnax lists the solenoids on this style of pack as low/reverse, multi-select, underdrive, overdrive, 4th clutch and 2nd clutch, each around 1.3 ohms, plus a 3.5 ohm pressure control solenoid that sets line pressure. Underdrive and multi-select are normally applied, the rest normally vent. Built into the same housing are the pressure switches the computer reads to prove a clutch actually filled, and the 23-pin connector also carries the range sensor and fluid temperature signals. Because the solenoids, switches and connector share one body, the block is serviced as a unit.
Chrysler's own diagnostic for P0750 describes it as strictly an electrical fault. The computer checks every solenoid circuit at key-on and again every 10 seconds, so before buying, unplug the harness at the case and meter each solenoid at the pass-through connector. An open or shorted coil confirms the pack; a good pack with a corroded or chafed harness does not. Chrysler also states that when the solenoid assembly needs replacing, the valve body should not be replaced along with it. Pressure switch codes are different: they can be caused by hydraulic leaks, so read our RFE shift solenoid testing guide and the valve body problems guide before deciding the block is at fault.
Listed fitment covers the Chrysler Aspen 2007-2009, Dodge Dakota 2004-2011, Durango 2004-2009 and 2011-2013, Ram 1500 2004-2017, Ram 2500 and 3500 2004-2018, Ram 4500/5500 2016, Jeep Commander 2006-2010, Grand Cherokee 1999-2013, Liberty 2002-2003 and 2005-2006, and Mitsubishi Raider 2006-2007. That list spans several pack designs. Transmission Digest identifies the white connector as the 2004-on design used in the 45RFE and 545RFE and in early 68RFE units, while 68RFE trucks from about 2010 moved to a gray connector pack without the overdrive solenoid, and 2019-up trucks use a blue connector. Look at the connector on your old pack and compare its part number to the list above. A gray or blue connector, or any doubt, means send us your year, model and VIN first. Other versions are in the RFE solenoid and valve body collection.
The block comes off with the transmission in the vehicle. Drain the fluid, drop the pan and filter, unplug the case connector, remove the pack bolts and lift it straight up so the valve body and check balls stay put. Use a new pack gasket and torque the bolts evenly in steps. Refill with ATF+4 only and set the level hot. Chrysler lists solenoid pack replacement as a job that needs a Quick Learn with a scan tool: brakes applied, engine above 500 rpm, closed throttle and fluid between 60 and 200 F. If the valve body casting itself is worn, a 45RFE valve body is the better repair, and a 545RFE shift kit can be installed during the same pan-down job.
| Transmission | 68RFE, 45RFE, 545RFE (Chrysler RFE family) |
| Replaces OE | 52119435AF, 5170877AF, 68002342AF, 5170877AA-AD, 52119435AA, 68353383AB, 68353383AC, 68376695AA |
| Includes | Complete solenoid block with pressure transducer and connector |
| Vehicles | Ram 1500 2004-2017, Ram 2500/3500 2004-2018, Ram 4500/5500 2016, Dakota, Durango, Grand Cherokee, Commander, Liberty, Aspen, Raider |
| Common codes | P0750-P0760 solenoid circuit, limp mode |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It depends on the connector your truck uses. This pack has the white connector. Transmission Digest notes 68RFE trucks moved to a gray connector pack without the overdrive solenoid around 2010, and 2019-up trucks use blue. Match the connector color and part number on your old pack, or send us the year and VIN.
The listing gives 52119435AF, 5170877AF and 68002342AF, with cross references to 5170877AA through AD, 52119435AA, 68353383AB, 68353383AC and 68376695AA.
No. This is the solenoid block only. Plan on a new pan filter, pan gasket and fresh ATF+4 since the pan has to come off anyway.
Yes. Chrysler calls for a Quick Learn with a scan tool after solenoid pack replacement so the computer relearns clutch fill. Skipping it usually leaves harsh or flared shifts.
Possibly, but pressure switch rationality codes can also come from hydraulic causes such as damaged check balls or a cut piston seal. Check fluid level and line pressure first; a P0750-P0765 circuit code is a much more direct sign the block is bad.
