Excess wear at the accumulator bore or on the critical diameter of the accumulator piston is common in first generation GM 6T70 and 6T75 transmissions. The 4-5-6 accumulator piston is utilized during apply of the 4-5-6 clutches to smooth engagement. Wear at this bore allows 4-5-6 clutch apply oil to exhaust, resulting in ratio codes, harsh or delayed application of the clutch pack, burnt clutches and slipping/flares. Installing Sonnax 4-5-6 accumulator piston kit 124740-04K eliminates leaks to restore normal shift operation and feel.

O-Ring incorporated for positive sealing, even in worn bores
Annular grooves help center piston in bore to reduce future side-load wear
Hardcoat anodized aluminum piston combats premature wear
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

Strange ,Disc Brakes, Rear, '57-'64 Olds, 2 Piece Stainless Rotor, Hard Pads, 1 Piece Rotor, Kit

Strange ,Disc Brakes, Rear, '57-'64 Olds, 2 Piece Stainless Rotor, Hard Pads, 1 Piece Rotor, Kit

$2,247.80

Wilwood Spacer, Pushrod, M/C, 1.620 Length, Tandem

Wilwood Spacer, Pushrod, M/C, 1.620 Length, Tandem

$15.90