Sonnax heavy duty forward drum 34554-01 is a lightweight upgrade for GM TH400 high performance applications. Significant weight was removed behind the forward piston, leaving a larger fluid apply volume. This larger fluid apply volume does not significantly affect clutch apply and release times, but some sensitive applications may benefit from reduced volume with Sonnax clutch volume spacer kit 34554-11K. The optional spacer is manufactured from billet aluminum.

Reduce clutch fill time when used with heavy duty forward drum 34554-01
Billet aluminum spacer is lighter and more affordable than the OE steel it replaces

More From This Category

Cast Piston

Cast Piston

$100.64

KB Piston, 4 in. Bore, For Ford 302 Rod 5.090 Hollow Dome -14.7cc 2V, .060 Oversized, w/ Rings, Each

KB Piston, 4 in. Bore, For Ford 302 Rod 5.090 Hollow Dome -14.7cc 2V, .060 Oversized, w/ Rings, Each

$1,150.95

Motive Gear Differential Bearing Kit, Koyo, For AM GENERAL HUMMER 1992–2001, Kit

Motive Gear Differential Bearing Kit, Koyo, For AM GENERAL HUMMER 1992–2001, Kit

$256.79

Motive Gear Nv4500 M/S Chev P-Series (Bolt, Each

Motive Gear Nv4500 M/S Chev P-Series (Bolt, Each

$404.23

TURBOSMART Boost Reference Adapter, For VW Golf GTI Mk5/6, Black, Each

TURBOSMART Boost Reference Adapter, For VW Golf GTI Mk5/6, Black, Each

$61.67

Wilwood Caliper, AERO4-DS, Radial, 0.81 in. Rotor Width, 15.00 in. Rotor Dia, 1.12/1.12 in. Bore, Universal, Alum, Black, Each

Wilwood Caliper, AERO4-DS, Radial, 0.81 in. Rotor Width, 15.00 in. Rotor Dia, 1.12/1.12 in. Bore, Universal, Alum, Black, Each

$871.85