E4OD, 4R100

Fits '97-later units with either style outboard fitting.

Symptoms:

• TCC slip
• Soft TCC apply
• Code 1783
• Code 1741, 1744
• Overheating
• Low cooler flow
• Overheated converter
• Overheated OD area

Cause:
Cooler bypass leaking or opening at lower cracking pressure.

Correction:
The Sonnax cooler bypass kit salvages the OE fittings and tube, and maintains cracking pressure at 70-75 psi.

Sticking of bypass components, spring relaxation or poor ball seat in Ford 4R100 and E4OD units will allow the bypass to open at lower cracking pressure. This reduces TCC apply pressure, cooler flow at the overdrive section, and radiator flow responsible for heat transfer. The Sonnax cooler bypass valve kit allows the bypass valve assembly to be rebuilt and maintains cracking pressure at 70-75 psi.

• Hardened steel T-valve provides secure checkball seat and adequate bypass flow
• New spring cracks open at 70-75 psi to provide lube if cooler is blocked or restricted
• Hardened alloy steel checkball resists damage
• Seven new O-rings provide positive seal for cooler circuit
• Allows salvage of the OE fittings

Content:

• T-Valve
• Spring
• Checkball
• Small O-Ring
• Medium O-Rings (2)
• Large O-Rings (2)
• Extra Large O-Rings (2) 1 Extra

SONNAX Installation Instructions