Product Description
Sonnax part number: 154740-42K
Tooling Required
8L45 8L90 Oversized S1 S5 Clutch Control Valve Kit
Burnt clutches and poor shifts are common issues with GM 8L45 and 8L90 transmissions. These issues can be caused by worn clutch control bores allowing valuable clutch apply fluid pressure to leak, reducing the force needed to apply the clutches. Reconditioning the bore and installing Sonnax oversized S1/S5 clutch control valve kit 154740-42K restores proper function.
- Hardcoat anodized aluminum valve combats premature wear
- Lengthened valve spool utilizes unworn bore section to seal apply oil
- Oversized valve and replacement spring maintains OE functions and pressures
Symptoms
- Burnt clutches
- Pressure loss
- Poor shift quality
Cause
Wear of the OE clutch control valves can allow clutch apply fluid pressure to leak, resulting in burnt clutches that cause poor shift quality.
Correction
Reconditioning the bore and installing Sonnax oversized S1/S5 clutch control valve kit restores proper hydraulic function.
Contents
- Valve
- S1/S5 Spring
Product Videos
Custom Field
Requires Tooling Yes
Transmission Model(s) 8L45, 8L90
