Warning:

GM 6T70 and 6T75 Gen. 1 early- and late-style units cannot be interchanged but are very similar in appearance. Reference the Sonnax identification guide to verify the correct valve body is installed.

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

Remanufactured Valve Body
Part No. GM6T70-1L

Fits '09-later units with 1.83 ratio 3-5-R clutch regulator valve. Sold without TEHCM.

Tech & Install Tips Find a Distributor

Sonnax remanufactured valve body GM6T70-1L has been designed to address common issues, such as: codes P0741, P0742; harsh TCC apply; TCC slip; solenoid performance codes; wrong gear starts; slips and flares; delayed engagements; burnt clutches; low converter and lube flow; and erratic line pressure.

To guarantee the highest level of operational performance, this remanufactured valve body is tested on state-of-the art equipment to verify that actuator feed limit pressure, clutch pressures, torque converter pressures, and line pressure match OE specification.

A TEHCM is not included with the valve body, but is available from OE and various aftermarket sources if required.

  • Bores, checkballs, seals, casting...every critical area is reviewed, refreshed and repaired
  • New separator plates and gaskets installed
  • Top-quality Sonnax components optimize valve body function and prevent future wear
  • State-of-the-art testing verifies main line, AFL, clutch, torque converter pressure match new OE specs

Save your existing manual valve for reuse with our remanufactured valve body.

October 27, 2014

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January 05, 2018

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February 12, 2018

Transmission Report: How Small Changes Led to the New Form & Function of Gen. 2 6T70/75 Valve Bodies

Topics: Transmission Report Newsletters Transmission Ford GM ZF 6T70 (Gen. 1) Transmission 6T75 (Gen. 1) Transmission 6T75 (Gen. 2) Transmission 6T80 (Gen. 2) Transmission 4L85-E Transmission 4L80-E Transmission 6T70 (Gen. 2) Transmission 6F35 (Gen. 1) Transmission 6F35 (Gen. 2) Transmission

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October 18, 2018

GM Gen. 1 6T70 & 6T75 Identification Guide

Topics: Identification Guides Transmission GM 6T70 (Gen. 1) Transmission

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  • Gm6t70 1lback
  • 6t70 gen1 webid
  • Gm6t70 1lfront

GM Gen. 1 6T70 & 6T75 Identification Guide

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GM Gen. 1 6T70 & 6T75 Identification Chart
Model Year3-5-R Clutch Reg. ValveLower Separator PlateUpper Separator PlateExhaust PortControl Valve Channel Plate
2007 & 20081.35 RatioCut OutNo NotchClosedLevel with Valve Body
20091.83 RatioNotchNotchClosedLevel with Valve Body
2010 & 20111.83 RatioCircle HoleNotchOpenLevel with Valve Body
2012 & 20131.83 RatioCircle HoleNotchOpenRaised Notch Above Valve Body
Lower and Upper Separator Plates
Exhaust Ports