Browse by Manufacturer
Browse Categories


Shopping Cart
Your cart is empty.

"RFE" Accumulator Piston Kit

Mfg Retail: $144.99
Cost From Us: $109.00
You Save: $35.99
In Stock
Our Part #: S-44894-01MK
Manufacturer: Sonnax
Mfg Part # : 44894-01MK
free shipping
" RFE " Accumulator Piston Kit
Fits All Dodge & Jeep 4.7L / 5.7L / 6.7L "RFE" Models

Made By Sonnax Performance Products

Repairs Pressure Loss From Worn Out Bores & Upgrades Factory Plastic Weak Pistons
75% Of The 2009 Up Trucks Need This Kit
We've Dropped The Price To Barely Over Cost To Help These Truck Owners.

Fits Below Dodge, Jeep, & Chrysler

45RFE / 45-RFE / 45R-FE
545RFE / 5-45RFE / 545-RFE / 545R-FE
65RFE / 65-RFE / 66RFE / 66-RFE / 65R-FE / 66R-FE
68RFE / 68-RFE / 68R-FE / RE68 / RFE68

Critical Update Kit For Inferior Polymer / Plastic Piston Models

How This Corrects Factory Design Flaw's & Product Insight

Accumulator piston scuffing and bore wear are common issues in valve bodies, especially when running increased pressures.
The OE accumulator pistons have two seal rings.
The seal groove at the open end of the piston is a larger diameter, with the seal ring acting as a guide to prevent piston-to-bore contact.
The seal groove at the closed end of the piston is a smaller diameter and the seal ring acts as a conventional seal.
However, due to the smaller seal groove diameter, the piston will contact the bore when side-loaded
resulting in scuffing, wear and leakage of clutch apply pressure.

Contents Of This Piston Package :
  • Pistons, Anodized Red (5)
  • Guide Seals (10) PTFE , Solid - Best Sealing Properties
  • Seals (5) PTFE, Scarf Cut

Further Explaining This Item:

Each piston in the Sonnax accumulator piston kit 44894-01MK features two guide seal rings,
one at each end of the piston to prevent piston-to-bore scuffing when side loaded.
Additionally, the oil sealing ring location is relocated on the piston allowing it to run in an
un-worn portion of the bore enabling bores with moderate scuffing to be salvaged.
Manufactured from 6061 billet aluminum, these pistons will upgrade late model applications
with plastic pistons to prevent transmission failure due to piston breakage.
  • Dual-guide seals prevent piston-to-bore scuffing
  • Updated seal location allows use in scuffed bores
  • Prevents transmission failure from broken plastic pistons

Tech Tip

These Valve Bodies Always Also Need The HD Steel Accumulator Support / Cover Plate.
There's a heavy duty one in the transgo shift kit part # 72165T, and Sonnax also offers a plate update kit.
We strongly suggest to not overlook this additional plate while you're right there with the valve body removed.

Photo Is Actual Item You Will Be Shipped With This Purchase

Our Part #    S-44894-01MK

We would appreciate the opportunity to serve your transmission parts needs ! ! !

Cascade Transmission Parts , Inc.
All Rights Reserved ®

Customers Who Bought This Also Bought

"RFE" Transgo Shift Kit
Mfg Retail: $77.89
Cost From Us: $60.00
You Save: $17.89
"RFE" Transgo Shift Kit
free shipping
45RFE / 545RFE Solenoid Block Service Kit 4WD
Mfg Retail: $379.50
Cost From Us: $329.88
You Save: $49.62
45RFE / 545RFE Solenoid Block Service Kit 4WD
Contains All Necessary Components - See More Info
free shipping

Product Reviews

(2 Ratings, 0 Reviews) Average Rating:





Mailing Lists
There are no mailing lists at this time.