Symptoms:

  • 1-2 Flare
  • 5-6 Flare
  • 2nd Slip
  • 6th Slip
  • No 2nd
  • No 6th
  • Ratio codes
  • 2-6 Clutch burned
  • Erratic shift timing

Cause:

Oscillation of the 2-6 clutch regulator valve causes bore wear that prevents proper hydraulic actuation of 2-6 clutches.

Correction:

Recover hydraulic control and renew shift performance by reconditioning the bore and installing Sonnax oversized 2-6 clutch regulator valve kit.

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1)

Oversized 2-6 Clutch Regulator Valve Kit
Part No. 124740-17K


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

2-6 Clutches in Ford 6F50, 6F55 and GM Gen. 1 6T70 and 6T75 units are applied in second and sixth Gears in conjunction with other clutch packs. As the 2-6 clutch regulator valve oscillates and strokes over time, bore deterioration results, which prevents proper hydraulic control of the 2-6 clutches. This can cause flares, slipping, erratic clutch apply timing, ratio codes, and burnt 2-6 clutches. Reconditioning the bore and installing Sonnax oversized 2-6 clutch regulator valve kit 124740-17K restores normal shift operation and clutch control by re-establishing the hydraulic integrity of the 2-6 circuit.

Proper operation of 2-6 regulator valve depends on correct AFL pressure being supplied to pressure control solenoid. If problems are found with AFL pressure, Sonnax offers oversized AFL valve 124740-01.

  • 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
  • Spring
  • Regulator Valve
  • Gain Valve
  • End Plug

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.

Ford 6F50, 6F55 Valve Body Layout

Ford 6F50, 6F55 Valve Body Layout

GM 6T70/75 (Gen. 1) Valve Body Layout

GM 6T70/75 (Gen. 1) Valve Body Layout
  • 6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1) Oversized 2-6 Clutch Regulator Valve Kit 124740-17K
  • 6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1) Oversized 2-6 Clutch Regulator Valve Kit 124740-17K

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.

6F50, 6F55, 6T70 (Gen. 1), 6T75 (Gen. 1) Oversized 2-6 Clutch Regulator Valve Kit Vacuum Test Locations