45RFE Overhaul Kit 1999-2009, new and ready to install. Fits the 45RFE. Ships fast from the USA.
Important: this item is titled as an overhaul kit, but the part you receive is a complete valve body repair kit for the 45RFE, 5-45RFE and 545RFE, built for the 7-ball valve bodies used up to 2009. If your Ram 1500, Durango, Dakota, Grand Cherokee, Liberty or Commander has lost drive after a shift into Reverse, binds up, drops into failsafe, or keeps setting pressure switch and line pressure codes after a solenoid pack has already been replaced, worn valve body bores are a likely cause and this kit is aimed squarely at them. It is not a seal and gasket set for a transmission teardown.
According to the listing, the kit includes a billet channel plate, billet pistons with seals and a support plate, a drop-in solenoid switch valve with its plugs, a blocked separator plate with gaskets, and heavy-duty bolts. No reaming is required, which is what makes the switch valve repair practical outside a valve body shop.
The solenoid switch valve is the heart of the problem on these units. Sonnax explains that it directs fluid between the low/reverse clutch and the torque converter clutch, and also feeds the 2nd and overdrive clutches through two shuttle plugs at the end of its bore. As that bore wears, the valve and plugs stick, and the transmission can bind, set codes or lose a circuit entirely. Replacing the worn valve and plugs with a drop-in repair restores control of those circuits without replacing the whole casting.
Rule out the solenoid pack and wiring first, since pressure switch codes can be electrical, then pull the valve body and vacuum test the bores. Sonnax recommends vacuum testing as the best way to decide whether a repair is needed. Our 45RFE/545RFE valve body problems and testing guide covers the full sequence. If the solenoid pack fails its resistance checks, replace it at the same time with a 45RFE solenoid kit.
This kit is for 7-ball 45RFE and 545RFE valve bodies up to 2009, which matches the 1999-2009 range on this page; the listing also names 68RFE units with the same early casting. The cutoff is real. Sonnax notes Chrysler deleted one solenoid and two check balls from the valve body for 2010, and the switch valve itself grew from a .420 inch large spool to .453 inch around the same time. Measure your switch valve and count the check balls before ordering, or send your year and VIN. If the casting is cracked or badly worn, a complete 545RFE valve body for 2004-2010 is the better fix; other options are on the 45RFE/545RFE collection page.
| Fits | 45RFE 1999-2009 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. Despite the title, it is a valve body repair kit: billet channel plate, billet pistons with seals and support plate, drop-in solenoid switch valve and plugs, a blocked separator plate with gaskets, and heavy-duty bolts.
It is made for 7-ball valve bodies up to 2009. Chrysler removed two check balls and enlarged the switch valve around 2010, so later units need a different repair. Send your VIN if you are unsure.
No. The listing states no reaming is required; the solenoid switch valve repair is a drop-in.
Sonnax lists codes 841, 868, 871 and 988 among the symptoms, along with bind-up, failsafe mode and torque converter clutch apply problems.
Yes. Run the Quick Learn procedure with a scan tool after valve body work so the controller relearns the clutch fill values.
