GM 8L45 and 8L90 transmissions often suffer burnt clutches, shift concerns, low line pressure and/or converter apply complaints due to excess wear in the signal accumulator piston bores in the control solenoid valve body casting. This wear allows valuable VFS signal pressure to exhaust, preventing proper shift control, line pressure regulation and/or converter clutch apply.
Reconditioning these bores and installing Sonnax oversized signal accumulator piston kit 154740-01K re-establishes correct clearance for proper VFS signal pressure.

Hardcoat anodized aluminum pistons combat premature wear
Annular grooves reduce wear rate

More From This Category

Motive Gear Differential Bearing Kit, Koyo, For BUICK CENTURION 1971–1972, Kit

Motive Gear Differential Bearing Kit, Koyo, For BUICK CENTURION 1971–1972, Kit

$152.24

Motive Gear Differential Master Bearing Kit, Koyo, For TOYOTA 4RUNNER 1988–2002, Kit

Motive Gear Differential Master Bearing Kit, Koyo, For TOYOTA 4RUNNER 1988–2002, Kit

$464.49

Motive Gear Differential Bearing Kit, Koyo, Ford 8 Inch Diff With 1.625" Genuine Carrier Bearings, Kit

Motive Gear Differential Bearing Kit, Koyo, Ford 8 Inch Diff With 1.625" Genuine Carrier Bearings, Kit

$165.04

TCI Pg Steel Ringless Gerotor Pump

TCI Pg Steel Ringless Gerotor Pump

$1,728.42

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

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

$347.07