Symptoms:

  • Inconsistent shift quality
  • High shift adapt numbers
  • Burnt clutches

Cause:

Worn 1-2 and 2-3 accumulator piston pin bore.

Correction:

Sonnax oversized replacement accumulator pin restores the proper fit between the piston and the bore and allows re-use of the original aluminum piston.

4T65-E

Oversized Accumulator Pin Kit
Part No. 84754-51K

Package Quantity: 4


View Instructions Find a Distributor

Inconsistent shifts, high shift adapt numbers and burned clutches in a GM 4T65-E can all be traced back to worn accumulator pistons. Pin bore wear allows clutch apply pressure to exhaust into accumulator circuits and decrease clutch apply pressure. Sonnax accumulator oversized pin kit 84754-51K allows easy repairs of worn pistons.

  • Oversized accumulator pin restores the proper fit between the piston bore and pin
  • Pin is made from hardened steel and fits more securely in the valve body bore, preventing oil from exhausting through the valve body
  • Allows the rebuilder to re-use the original piston while providing a more durable, less expensive solution
  • Starter kit 84754-52K contains 10 pins plus one reamer
  • 4T65-E Oversized Accumulator Pin Kit 84754-51K
  • 4T65-E Oversized Accumulator Pin Kit 84754-51K