45RFE Shift Kit 1999-10, new and ready to install. Fits the 45RFE. Ships fast from the USA.
A Ram 1500, Dakota, Durango, Grand Cherokee, Commander or Liberty with a 45RFE or 545RFE that slurs the 2-3 and 3-4 shifts when loaded, chews up the Overdrive clutch after a rebuild, or sets P0868 for low line pressure is the truck this kit was made for. This listing is the TransGo RFE-7B-HP High Pressure Tuneless Reprogramming Kit, new, for 1999-2010 RFE transmissions that use the original 7-check-ball valve body. It is a hydraulic recalibration, not a computer tune, and it goes in while the transmission is apart on the bench.
The 45RFE and 545RFE are clutch-to-clutch automatics: there are no bands, and every shift is one clutch releasing while another applies under solenoid control. The underdrive, overdrive and reverse clutches live in the input drum, with the 2nd, 4th and low/reverse clutches held by the case. The computer decides when a shift happens, but the pressure regulator spring, the separator plate orifices and the accumulators decide how hard each clutch is clamped. TransGo's instructions state the kit adds about 30 percent more line pressure at every throttle opening without software. The new pressure regulator spring and the matching triple separator plate raise pressure at the clutch ports while keeping the transducer circuit from seeing it, so the controller does not fight the change.
Inside the box: the triple separator plate and valve body gaskets, a new pressure regulator spring, a drop-in converter limit valve system with drill jig, bit and deburring tool, a heavy duty accumulator cover, recalibrated OD accumulator springs and shim, a self-cleaning low/reverse switch valve and end plug, accumulator seals, TCC accumulator springs and retainer, a heavy duty input drum snap ring, and an optional TCC valve for triple-disc converters.
What it will not cure: a worn solenoid switch valve bore, the classic cause of a delay or loss of drive after Reverse with P1776 on high-mileage RFE units. The kit replaces the switch valve itself, but a scored bore still needs a switch valve repair kit or a replacement valve body.
Scan the codes and look at the fluid. A pan full of friction material means the clutch packs are already damaged and need to be replaced along with the kit. Electrical faults such as a P0750 solenoid circuit code point to the solenoid pack, not the hydraulics. Our 45RFE harsh shift guide covers the learned-value and line pressure checks, and the 45RFE valve body testing guide shows how to separate valve body wear from clutch wear.
TransGo rates the RFE-7B-HP for 1999-2010 45RFE, 545RFE, 65RFE, 66RFE and 68RFE units with a 7-check-ball valve body only. On 45RFE and 545RFE trucks that covers the original Ram 1500, Dakota, Durango and Jeep applications through 2010. Later units with the 5-ball valve body need TransGo's RFE-5B-HP instead, and the triple plate in this kit will not work with them. Because valve body designs changed during production, count the check balls when the valve body is out, or send us your year and VIN before ordering. More parts for this transmission are in the 45RFE and 545RFE collection.
Since the unit is apart anyway, most builders install it with a 45RFE overhaul kit and a fresh friction and steel module.
| Fits | 45RFE 1999-10 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It fits 545RFE units built with the 7-check-ball valve body, which covers most trucks through the 2010 model year. Count the check balls when the valve body is out, or send us your year and VIN and we will confirm before it ships.
No. TransGo designed it as a Tuneless kit, meaning the pressure increase comes from the new pressure regulator spring and separator plate rather than a computer calibration. You do need a scan tool to run the Quick Learn afterward.
Usually not by itself. That symptom, often with P1776, comes from a worn solenoid switch valve bore. The kit includes a new switch valve, but a worn bore needs a switch valve repair kit or a replacement valve body.
No. TransGo's instructions call for transmission removal because the pump cover has to be drilled and the input drum snap ring and accumulator parts are replaced.
Use ATF+4, the fluid these transmissions were designed for, and pre-soak any new frictions in it before assembly. Check the level hot after the Quick Learn and road test.
