Transmission Parts Ford GM 6F55 6T70 (Gen. 1) 6T75 (Gen. 1) 6F50 Valve Body Valve / Sleeve

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

Tooling:

F-124740-TL17
VB-FIX

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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

Contents

Spring
Regulator Valve
Gain Valve
End Plug

Valve Body Layout

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.