Product Description
RE5R05A A5SR1/2 5EAT Oversized Cooler Bypass Valve Kit
SOME RE5R05A VALVE BODIES DO NOT CONTAIN A COOLER BYPASS VALVE. UNITS CAN BE IDENTIFIED BY EMPTY COOLER BYPASS BORE AND BLOCKED SEPARATOR PLATE HOLES.
Sonnax Part Number: 63741-07K
TOOLING REQUIRED
- F-63741-TL7
- VB-FIX
In Jatco/Nissan RE5R05A units, the cooler bypass valve is designed to allow excess oil to bypass the cooler circuit when required. However, if there is excessive wear in the bore, it can allow converter and/or lube circuit leakage and prevent the valve from stroking to the bypass position if needed. This can result in increased ATF temperature causing bushing and sealing failure, planetary destruction and converter or part overheating and damage. Severe wear prevents the valve from stroking properly, simulating a cooler restriction and increasing converter charge pressure. Sonnax oversized cooler bypass valve kit 63741-07K allows the bore to be refurbished to restore hydraulic integrity and has multiple design improvements to prevent reoccurrence of the failure.
- Hardcoat anodized aluminum valve combats premature wear
- Annular grooves added to hydraulically center the valve in the bore to prevent wear
- The lengthened valve provides over twice as much sealing contact area as OE
- Stability of the valve in the bore is greatly increased due to the critical spool diameter being over twice as long as OE
PACKAGE CONTAINS
- Valve
- Spring
SYMPTOMS
- Overheated fluid
- Damaged parts & planetaries
- Overheated converter
- Burnt parts & planetaries
- Premature lockup
- Inadequate lubrication
CAUSE
CORRECTION
