Symptoms:

  • Flare shifts
  • Soft shifts
  • Harsh shifts
  • Low line pressure
  • High line pressure
  • Loss of lube oil
  • Low converter pressure
  • Uncontrolled clutch pressure & cycling
  • OD clutch distress
  • UD Clutch distress

Cause:

Pressure regulator bore wear creates line pressure instability. This affects the solenoid feed, lube and converter control.

Correction:

Sonnax oversized pressure regulator valve restores OE line pressure control.

Warning:

Required tool kit F-41954-TL is no longer in production. Check with your distributor for available inventory.

A5GF1, A5HF1, F4A41/42/51, F5A51

Oversized Pressure Regulator Valve
Part No. 41954-01K

FWD only, replaces OE valves with .540", .616" & .645" spool dia.


You need this if... View Instructions Find a Distributor

If wear in listed Hyundai/Kia and Mitsubishi transmissions occurs at the balance/inboard end, the valve will not stroke to reduce line pressure and reduces feed to the converter/lube circuits. This can result in high line pressure, harsh shifts, reduced converter pressure and loss of lube. Severe wear at the other pressure regulator valve circuits can allow line pressure to exhaust, resulting in low line pressure, soft shifts and burnt clutches and bands. Sonnax oversized pressure regulator valve 41954-01K restores the valve body to normal operating condition.

  • Hardcoat anodized aluminum valve combats premature wear

May be used in Mitsubishi front wheel drive, 96-later valve bodies including F4A41/42/51, F5A51 and Hyundai/Kia A5HF1 and A5GF1. However, OE valve spool diameters MUST be measured to verify application. This kit CANNOT be used in rear wheel or all wheel drive units.

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 Oversized Pressure Regulator Valve 41954-01K
  • A5GF1, A5HF1, F4A41/42/51, F5A51 Oversized Pressure Regulator Valve 41954-01K
  • A5GF1, A5HF1, F4A41/42/51, F5A51 Oversized Pressure Regulator Valve 41954-01K details

You need this if...

A5GF1, A5HF1, F4A41/42/51, F5A51 Oversized Pressure Regulator Valve Vacuum Test Locations