10L80, 10L90

Symptoms:

• No shift
• Burnt clutches
• Clutch failure

Cause:
Excessive wear in the feed limit high valve bore allows pressure loss that causes clutch failure and shifting concerns.

Correction:
Installing Sonnax drop-in feed limit high valve kit corrects circuit pressures and restores proper valve functions.

The feed limit high valve in listed GM transmissions limits line pressure feed to the boost ball system for "C" and "F" clutch controls. Excessive wear in the feed limit high valve bore allows pressure leakage, which can be the source of shift problems and clutch failure.

Installing the Sonnax feed limit high valve kit, corrects circuit pressures and restores proper valve functions.

• Hardcoat anodized aluminum valve combats premature wear
• Highly wear-resistant valve sleeve increases life of part
• Undersized valve and replacement spring maintains OE functions and pressures
• Drop-in Zip Valve™ parts install quickly and easily

Contains:

• Valve
• Sleeve
• Spring
• Retainer
• Drill
• Rivet

129788K Instruction Sheet