SonnaxPiston

Worn-out accumulator piston bores in listed Aisin AW 6-speed units allow pressurized transmission fluid to leak past the accumulator piston to the sump. These leaks can result in a flare at upshift, delayed engagement, poor line rise or clutch failure. The Sonnax accumulator piston kit S39927AK will restore a worn accumulator bore and correct leakage problems. Salvages valve bodies with severe accumulator bore wear; O-Ring seal improves piston response; Drop-in Zip Valve™ parts install quickly and easily

Piston