Product Description
CD4E LA4A-EL Oversized Bypass Clutch Control Valve Kit
Sonnax Part Number: 73840-BK
TOOLING REQUIRED
- 73840-BTL
THIS KIT CANNOT ADDRESS HIGH LINE PRESSURE IN THE PR BALANCE CIRCUIT, WHICH CAN BREAK UP PARTS AND REDUCE FLOW INTO THE CONVERTER/COOLER CIRCUITS.
Worn bores in the Ford CD4E and Mazda LA4A-EL converter bypass lineup reduce TCC control and cooler flow. This results in bushing or planet failure, reduced converter clutch life from overheating and often results in codes 628/1744/1740. Slippage codes are often generated as the unit comes up to operating temperature. As the temperature rises, valve control becomes poor and excessive clearance creates excessive leakage of converter pressure.
Sonnax oversized bypass clutch control valve kit 73840-BK features a tightly toleranced sleeve and plunger valve to prevent leakage, and an oversized and improved design bypass clutch valve.
- Plunger valve and oversized bypass clutch valve have extended spools for better support and annular grooves to prevent wear due to side-loading
- Lubrication plugs increase lube and converter pressures by tapping into line pressure instead of depleting converter feed
- Plunger sleeve manufactured from highly wear-resistant aluminum
- Hardcoat anodized aluminum valves combat premature wear
PACKAGE CONTAINS
- Rivets (3)
- Bypass Clutch Valve
- Plunger Valve
- Bypass Clutch Sleeve
- Lubrication Plugs (4) 1 Extra
SYMPTOMS
- Code 628, 1744, 1740
- Reduced converter clutch life
- Planetary failure
- Bushing failure
- Loss of lube oil
CAUSE
CORRECTION
