Product Description
Sonnax part number: 97855-30K
FITS TYPE-1 (8931 CASTING CODE) WITH 0.546" DIAMETER LARGE SPOOL
A340E A340F A340H Boost Valve Kit
No tooling required
The steel OE valve in Toyota/Lexus A340 and A340E/F/H Type 1 transmissions moves within the cast aluminum sleeve, wearing the sleeve. After this wear becomes severe, the valve no longer operates properly, causing soft upshifts and delayed engagement. Sonnax boost valve kit 97855-30K restores hydraulic integrity and prevents cross-leaks.
- Sleeve is made from high-quality aluminum for better wear resistance
- Hardcoat anodized aluminum valve combats premature wear
- Drop-in Zip Valve™ parts install quickly and easily
Symptoms
- Delayed engagement
- Low line rise
- Low line pressure in Reverse
- High line pressure in Reverse
- Erratic line pressure
- Soft upshifts
- Repeated clutch failure
Cause
Severe wear of the boost sleeve allows TV and boost oil leakage.
Correction
Sonnax drop-in boost valve kit restores hydraulic integrity and prevents cross-leaks.
Contents
- Sleeve
- Valve
- Shims (3)
Product Videos
Custom Field
Requires Tooling? No
Transmission Model(s) A340, A340E, A340F, A340H
