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4R44E / 5R55E Zip Kit


Mfg Retail: $147.85
Cost From Us: $120.88
You Save: $26.97
In Stock
Our Part #: S-4R44E-5R55E-ZIP
Manufacturer: Sonnax
Mfg Part # : 4R44E-5R55E-ZIP
free shipping
4R44E / 5R55E Transmission Zip Kit
From Sonnax Industries - Designed To Improve All The Various Factory Flaws

Ideal For ALL 6 Solenoid Valve Body 2005 To 2011 Ford Ranger & Explorer's

Symptoms This Will Prevent And/Or Corrects :

Gear Ratio & Solenoid Codes

Low Line Rise
Soft Shifts
Erratic Shifts
No 3rd When Hot
No 4th ( Overdrive ) When Hot
2nd Gear Starts
Delayed Forward
TCC Apply Concerns

Included In This Package :
  • Forward Modulator Valve, PTFE Seal, End Plug, Spring, & O-Ring Large O-Ring
  • Boost Valve & Sleeve Kit
  • Reverse Modulator End Plug & O-Rings 2 Medium O-Rings
  • Kick Downshift, Manual Low & Throttle Downshift End Plugs (2) 1 Large, 1 Small
  • Kick Downshift, Manual Low & Throttle Downshift O-Rings (6) 2 Large, 4 Small
  • Extra End Plug O-Rings (6) 2 Large, 2 Medium, 2 Small
  • Checkballs (4) Plastic
  • EPC Limit Valve
  • Lube Orifice Plug
  • “ L ” Pins (2)
  • TCC Apply & OD Servo Apply Pressure Modification Drill Bits (4) .055” dia., .062” dia., .072” dia. & .110” dia. (Not Shown)
  • Plug Aluminum, .062” (Not Shown)
  • Shift Solenoid O-Rings (8) 4 Small, 4 Large (Not Shown)
  • 2-3/3-4 Shift Valve End Plug & O-Rings 2 Small O-Rings
  • 1-2/2-3 Shift Valve End Plug & O-Rings 2 Medium O-Rings
  • Converter Regulator Valve End Plug, Spring, & O-Rings 2 Large O-Rings

Sonnax Provided Video About These Packages & Kits :




Sonnax Zip Kit 4R44E-5R55E-ZIP targets the root cause of multiple complaints
by sealing the critical circuit pressure losses in the Ford 4R44E, 4R55E, 5R44E and 5R55E valve bodies.

The kit contains uniquely designed parts to prevent the loss of pressures within the main line,
EPC, solenoid feed and converter circuits.
This kit also includes modifications that provide firmer shifts,
improves intermediate servo and direct clutch pressure, and improves TCC apply.
The kit also seals multiple circuits known to suffer from end plug leakage or poor checkball sealing.

The Zip Kit quick guide provides clear and easy instructions on one sheet to get the unit sealed up and back on the road fast.

In addition to general rebuilding tips and technical information,
the technical booklet included in this kit contains vacuum testing and additional repair options for
higher mileage units or for repairing specific complaints which are beyond the scope of this kit.

No Reaming Or Special Tools Required

Installs Fairly Quick With Basic Mechanically Abilities Once Pan & Valve Body Removed
A Filter Kit, Valve Body Gaskets, And Servo Reseal Kit Strongly Suggested During This Repair.

Uniquely designed parts address root cause of valve body complaints by sealing critical pressure circuits

Detailed technical booklet included with in-depth rebuild and inspection tips for comprehensive valve body repair


Our Part #     S-4R44E-5R55E-ZIP
Sonnax Part # 4R44E-5R55E-ZIP



We Would Appreciate The Opportunity To Serve Your Transmission Parts Needs ! ! !

Cascade Transmission Parts , Inc.
All Rights Reserved ®



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