Sonnax has introduced a drop-in 4-5-6 sleeved accumulator piston kit (part no. 124740-68K). The company says users can recover hydraulic control and renew shift feel and performance in GM 6T70, 6T75, 6T80 (Gen. 2) transmissions by installing this kit.
This kit provides a positive sealing O-ringed sleeve to eliminate oil leaks and restore normal shift operation and feel, even in the most severely worn bores, Sonnax said.