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Symptoms:
  • 2nd Gear starts
  • Delayed Forward
  • Erratic shifts
  • Gear ratio & solenoid codes
  • Low line rise
  • No 3rd when hot
  • No 4th when hot
  • Soft shifts
  • TCC apply concerns

Cause:

Loss of oil pressure due to worn components in critical oil circuits.

Correction:

Zip Kit seals critical pressure losses

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Zip Kit®

Sonnax Part No.

4R44E-5R55E-ZIP

  • Boost Valve & Sleeve Kit 
  • Forward Modulator Valve, PTFE Seal, End Plug, Spring, & O-Ring Large O-Ring
  • Reverse Modulator End Plug & O-Rings 2 Medium O-Rings
  • 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
  • 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.
  • Plug Aluminum, .062”
  • Shift Solenoid O-Rings (8) 4 Small, 4 Large

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. No special tools are required for installing these parts.

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 required
  • Installs quickly with no special tools required
  • 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


Don't forget to check out Our other eBay store for 
Custom master Heavy Duty Kits or High performance Kits 
They can all be found here 
World Wide Parts Outlet

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Explanation of Friction plate materials:
We see many different listings on ebay that say Heavy Duty or High Performance on many different listings, it is a little misleading to say the least.

Paper Colors and Information:

Tan, Light brown & Dark Brown

Tan Paper Frictions ARE Stock Not High Performance Not Heavy Duty your Transmission from the factory 
was built with these "photo above Left".


Light & Dark Brown HE "high energy" papers are again stock materials on some but not all Transmissions from the factory. 
They are an improvement over the tan paper but they are NOT high performance and are NOT heavy duty "photo above Right".




Green/Grey with Graphite Fleck & Black With Graphite Fleck

Green/Grey with Graphite Fleck papers HEG "High Energy Graphite" are an improvement over stock and ARE considered Heavy Duty but NOT high performance.

Green with Graphite Fleck "photo above Left" is High Energy Graphite material.

Grey with Graphite Fleck is a just a Graphite infused Grey paper If it were NOT infused with the graphite is would carry the same grade as the Tan, Light & Dark Brown papers and would not be reliable for heavy duty use. But seeing it is infused with the graphite that would make it acceptable for Heavy Duty use.

Black With Graphite Fleck "photo above Right" ARE considered Heavy Duty and High Performance in any application. It is a carbon infused paper with the addition of graphite VERY Strong.




Blue & Red

Blue plates are sufficient for Heavy Duty use and also high performance "photo above Left".


Red Plates ARE the best material you can buy for ANY Heavy Duty or High Performance application hands down specifically the Red Eagle plates" photo above Right".

 




Information

Shipping:
Please contact us for pricing on shipping information for international order inquiries.


Alaska, Hawaii, Puerto Rico, APO/FPO MUST contact US before purchase 
for options and additional costs No exceptions.

Outside United States Shipping ONLY if your location is listed in the 
Global Shipping Program. 
You can see how much it will cost additionally by 
selecting see details on each Item.
Free Shipping is included for each Item Only to the US shipping center.
When you pay for the item through PayPal, you are authorizing 2 payment 
transactions. The first payment goes to the us the seller and consists of the 
item cost and the domestic shipping costs. 
The second payment goes to the global shipping provider and consists of the 
international shipping costs and any import charges. 




Returns:
30 Day return Money Back or replacement Parts but part or parts must be in good unused condition.


Buyer is to cover cost of return shipping and 15-20% restocking fee for all reasons other than: 

"A manufacturer defects is present or the incorrect parts were shipped from us" .


All returns are handled on a case by case basis.


All returns MUST go through ebay system so RMA # can be given and tracked.


If item or items are under warranty:

Buyer pays nothing for replacement or shipping of new or old parts either direction.


If buyer orders incorrect part or parts, permitting said item or items are not opened or used:

Buyer pays return shipping and a 15-20% restock fee.


If items are installed and used and want to return with no valid reason or warranty issue:

The return will be denied and no credit given. 

Unless approved by staff and would require prior contact before staring the return within ebay.