Sonnax 34200-16K Actuator Feed Limit Valve Kit for GM 4L80E 4L85E Transmission

The Sonnax 34200-16K Actuator Feed Limit Valve Kit is designed to solve common valve body wear problems in GM 4L80-E and 4L85-E transmissions. The actuator feed limit (AFL) valve in these units has a large reaction area and is greatly affected by side loading, which causes valve body bore wear over time. As the EPC solenoid oscillates the torque signal and AFL oil, valve action increases and accelerates wear. This wear reduces oil pressure to the shift solenoids, leading to solenoid codes, ratio codes, wrong gear starts, and lower line pressure.

Key Features:

• Hard-coat anodized valve provides extreme wear resistance
• Annular grooves minimize the effects of side loading
• Wear-resistant sleeve offers 54% more valve support than stock
• Full-contact sleeve design provides additional valve contact area
• Restores proper shift solenoid pressure and line pressure
• Helps prevent wrong gear starts and shift concerns

Kit Includes:

• Hard-coat anodized valve with annular grooves
• Wear-resistant sleeve
• Long and short springs
• Retainer

This kit corrects AFL oil pressure loss and restores proper transmission operation by preventing valve and bore wear. Installation requires special tooling (Sonnax tool 77754-TL recommended). Fits GM 4L80-E and 4L85-E transmissions from 1991 to 2018.