Symptoms:

  • Worn accumulator bores
  • Soft shifts
  • Harsh shifts
  • Delayed engagement
  • Shudder on engagement

Cause:

Side loading of the piston wears the piston bore.

Correction:

Sonnax accumulator piston kit improves sealing and prevents future wear.

A5GF1, A5HF1, F4A41/42/51, F5A51, R4/V4A51, R5A51, V5A51

Accumulator Piston Kit
Part No. 41954-02K

Fits any of four locations in '96-later units.

View Instructions Find a Distributor

Severe wear of the accumulator bores is very common in listed units. Sonnax accumulator piston kit 41954-02K improves the sealing in worn bores, while a guide seal will reduce future wear by preventing the piston from contacting the bore. This kit is used with the OE springs and requires no machining.

  • Reduces wear
  • No machining required
  • Hardcoat anodized aluminum piston combats premature wear
  • Re-uses OE springs
  • Piston
  • Guide Seal PTFE
  • D-Ring Seal Viton®

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Mitsubishi F4A, F5A Valve Body Layout

Mitsubishi F4A, F5A Valve Body Layout
  • A5GF1, A5HF1, F4A41/42/51, F5A51, R4/V4A51, R5A51, V5A51 Accumulator Piston Kit 41954-02K
  • A5GF1, A5HF1, F4A41/42/51, F5A51, R4/V4A51, R5A51, V5A51 Accumulator Piston Kit 41954-02K
  • A5GF1, A5HF1, F4A41/42/51, F5A51, R4/V4A51, R5A51, V5A51 Accumulator Piston Kit 41954-02K details