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  • Burnt clutches
  • Erratic line pressure
  • Low converter & lube flow
  • Overheating
  • Poor shift quality
  • TCC apply & release concerns


Continuous oscillation of pressure regulator valve results in excess bore wear, causing erratic line pressure and/or restricting converter feed oil.


Recover hydraulic control and renew line pressure performance by reconditioning the bore and installing Sonnax oversized pressure regulator valve kit.


Required tool kit F-102741-TL8 is no longer in production. Check with your distributor for availability.

A6GF1, A6LF1/2/3, A6MF1/2

Oversized Pressure Regulator Valve Kit
Part No. 102741-08K

You need this if... View Instructions

Hyundai/Kia A6LF1/2/3, A6GF1 and A6MF1/2 transmissions may exhibit multiple line pressure and converter-related problems due to excess wear in the main pressure regulator bore. Wear at the balance spool end allows critical fluid loss, resulting in high line pressure, harsh shifts, and overheating due to reduced cooler/converter flow. Wear at the outboard spool robs converter feed pressure and lowers line pressure, resulting in soft shifts and burnt clutches. Reconditioning the bore and installing Sonnax oversized pressure regulator valve kit 102741-08K restores hydraulic integrity for proper line pressure control and improved shifting in all ranges.

  • Oversized pressure regulator valve and matched spring restore OE function
  • Lengthened critical spools for improved seal and stability
  • Hardcoat anodized aluminum valve combats premature wear
  • Annular grooves help center valve in bore to reduce future side-load wear
  • Valve
  • Spring
  • Spacer 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 vbl thumb

September 30, 2005

Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits

Gregg Nader

Topics: Diagnostics And Theory Transmission

Read Now
  • 102741 08k combo
  • 102741 08k

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.

  • 102741 08k test