SonnaxAccumulator Piston Kit

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

Accumulator Piston Kit; 4-5-6, Includes O-Rings (2) 1 Extra, Small & Large Spring