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

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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.

  • 6T70 (Gen. 1), 6T75 (Gen. 1) Remanufactured Valve Body GM6T70-1L
  • 6T70 (Gen. 1), 6T75 (Gen. 1) Remanufactured Valve Body GM6T70-1L details
  • 6T70 (Gen. 1), 6T75 (Gen. 1) Remanufactured Valve Body GM6T70-1L details

GM Gen. 1 6T70 & 6T75 Identification Guide


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