When rebuilding high performance or heavy-duty Ford C6 transmissions, it is common to find a worn boost sleeve in the clicker-style valve body. This wear causes poor line rise, which results in erratic shift timing, Reverse shudder or direct clutch failure. This can be caused by the reciprocating boost valve wearing the inside diameter of the boost sleeve. When this occurs, oil that enters the modulated line pressure orifice leaks past the boost valve and exhausts through the Reverse orifice, resulting in poor or no line rise. The outside diameter of the boost sleeve may allow some leakage through the valve body, which can result in insufficient line rise.
Sonnax boost valve kit 36941-01K eliminates the above problems. Replace the boost valve and sleeve to restore performance and to reduce the chance of premature failure.

Sleeve is manufactured from highly wear-resistant aluminum alloy
Hardcoat anodized valve combats premature wear
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

Motive Gear Differential Pinion Bearing Kit, Timken, For CADILLAC ESCALADE 2002–2018, Kit

Motive Gear Differential Pinion Bearing Kit, Timken, For CADILLAC ESCALADE 2002–2018, Kit

$116.29

Motive Gear Differential Master Bearing Kit, Koyo, For CHEVROLET C30 1975–1986, Kit

Motive Gear Differential Master Bearing Kit, Koyo, For CHEVROLET C30 1975–1986, Kit

$367.48

Sonnax Forward & Reverse Abuse Valve Kit, GM, 4L60E/65E/70E, Each

Sonnax Forward & Reverse Abuse Valve Kit, GM, 4L60E/65E/70E, Each

$30.47

TCI Automatic Transmission Rebuild Kit, Master Overhaul, GM, 700R4, Kit

TCI Automatic Transmission Rebuild Kit, Master Overhaul, GM, 700R4, Kit

$507.30

Motive Gear Axle Shaft, 1541 Manganese, 5x4.5 in. Bolt Pattern, 29.04 in. Length, 27SPL, For CHEVROLET AVONDALE 1994–1997, Each

Motive Gear Axle Shaft, 1541 Manganese, 5x4.5 in. Bolt Pattern, 29.04 in. Length, 27SPL, For CHEVROLET AVONDALE 1994–1997, Each

$210.02