Symptoms:

  • Delayed engagement
  • Slips, flares & bind-ups
  • No Forward
  • No Reverse
  • Erratic shift timing
  • Ratio codes
  • 3-5-Reverse clutch burned
  • UD Clutches burned

Cause:

Oscillation of the 3/5/R or Underdrive pressure control valve results in bore wear that allows critical pressure loss, preventing proper hydraulic actuation of applicable clutch pack.

Correction:

Recover hydraulic control and renew shift performance by reconditioning the bore(s) and installing Sonnax oversized 3/5/R and Underdrive pressure control valve kit.

A6GF1, A6LF1/2/3, A6MF1/2

Oversized 3/5/Reverse & Underdrive Pressure Control Valve Kit
Part No. 102741-13K

Fits either of two locations.


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

3/5/Reverse clutches in listed Hyundai/Kia units are applied in Reverse, third and fifth gears in conjunction with other clutch packs. As the 3/5/R pressure control valve oscillates and strokes over time, bore deterioration results, which prevents proper hydraulic control of the 3/5/R clutches. This can cause flares, slipping, erratic clutch apply timing, ratio codes, loss of Reverse, and burnt clutches.

The Underdrive brake clutch is applied in first through fourth gears in conjunction with other clutch packs, and is susceptible to the same excess bore wear, causing similar concerns.

Reconditioning either or both bores and installing Sonnax oversized 3/5/Reverse and Underdrive pressure control valve kit 102741-13K restores normal shift operation and clutch control by shoring up the hydraulic integrity of these circuits.

  • New spring matches OE calibration
  • Hardcoat anodized aluminum valve combats premature wear
  • Annular grooves help center valve in bore to reduce future side-load wear
  • Valve
  • Spring
  • Solenoid Snout Sleeve

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.

Hyundai/Kia A6GF1, A6LF1/2/3, A6MF1/2 Valve Body Layout

Hyundai/Kia A6GF1, A6LF1/2/3, A6MF1/2 Valve Body Layout
  • A6GF1, A6LF1/2/3, A6MF1/2 Oversized 3/5/Reverse & Underdrive Pressure Control Valve Kit 102741-13K
  • A6GF1, A6LF1/2/3, A6MF1/2 Oversized 3/5/Reverse & Underdrive Pressure Control Valve Kit 102741-13K

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

A6GF1, A6LF1/2/3, A6MF1/2 Oversized 3/5/Reverse & Underdrive Pressure Control Valve Kit Vacuum Test Locations