Vehicles with GM 6L45, 6L50, 6L80 and 6L90 transmissions may have a number of TCC apply problems. Bore wear at the TCC regulator valve can cause no TCC apply or slipping on engagement, harsh shifts, loss of performance and fuel economy and fluid overheat. If the valve is stuck in the apply position, the result is harsh TCC apply. If the valve is stuck in the release position, no TCC apply or TCC slip will result.
For moderately worn bores, installing Sonnax TCC regulator valve kit 104740-46K will restore proper valve function resulting in proper TCC apply. The valve lands have been lengthened significantly, allowing the valves to operate in unworn portions of the casting bore to effectively seal against leakage.

Hardcoat anodized aluminum valves combat premature wear
Inboard and outboard spools on the TCC regulator valve have been made significantly longer to operate in unworn portions of the casting bore
Outboard shuttle valve has been made longer for better sealing and to prevent cocking in the bore
Restores proper valve function and TCC apply
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

MANLEY Valve, Race Master, Intake, Bead Loc, 44.5mm Head Dia, 0.275 in. Stem Dia, 4.705 Length, For Ford, Each

MANLEY Valve, Race Master, Intake, Bead Loc, 44.5mm Head Dia, 0.275 in. Stem Dia, 4.705 Length, For Ford, Each

$51.07

MANLEY Valve, Titanium, Intake, Bead Loc, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.35 in. Length, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.35 in. Length, Each

$325.41

MILODON Valves, Exhaust, Race, Stainless Steel, 1.77 in. Dia, For Pontiac, 1968-70, 326, 350, 389, 400, 421, 455, Set of 8

MILODON Valves, Exhaust, Race, Stainless Steel, 1.77 in. Dia, For Pontiac, 1968-70, 326, 350, 389, 400, 421, 455, Set of 8

$475.89

AFR Exhaust Valve, Ferrea Titanium Valve, 1.880 + .100 w/Tip Race Exhaust, Set

AFR Exhaust Valve, Ferrea Titanium Valve, 1.880 + .100 w/Tip Race Exhaust, Set

$3,942.80

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Set of 8

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Set of 8

$2,804.20

MANLEY Valve, Race Flo, Intake, 2.08 in. Head Dia, 0.3125 in. Stem Dia, 5.176 in. Length, For Chrysler HEMI, Set of 8

MANLEY Valve, Race Flo, Intake, 2.08 in. Head Dia, 0.3125 in. Stem Dia, 5.176 in. Length, For Chrysler HEMI, Set of 8

$1,138.39