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September 18, 2014
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GM Gen. 1, 2 & 3 6T30, 6T40, 6T45, 6T50 Series Identification Guide


Generation 1

Generation 2

Generation 3
Front Pump

Generation 1

Generation 2

Generation 3
View of Pressure Regulator Valve in Pump Port

Generation 1

Generation 2 & 3
Main Valve Body, Lower Side

Generation 1

Generation 2 & 3
Valve Body, Upper Cover

Generation 1

Generation 2 & 3
GM 6T40 Gen. 1 Channel Casting GM 6T40 Gen. 2 & 3 Channel Casting
Note channel casting worm track variations between Gen. 1 and Gen. 2 & 3.
Gen. 2 & 3 include pockets for 5 signal accumulator pistons.

Generation 1

Generation 2 & 3
6T40 Series Filter Plates
TEHCM, Lower Side

Generation 1

Generation 2
TEHCM, Upper Side

Generation 1

Generation 2 & 3
TEHCM ID Plate
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Related Units

6T40 (Gen. 2) Transmission 6 t45 (Gen. 2) Transmission 6T50 (Gen. 2) Transmission 6T30 (Gen. 2) Transmission 6T50 (Gen. 1) Transmission 6T40 (Gen. 1) Transmission 6T30 (Gen. 1) Transmission 6T31 (Gen. 3 6T40) Transmission 6T35 (Gen. 3 6T40) Transmission 6T41 (Gen. 3 6T40) Transmission 6T46 (Gen. 3 6T40) Transmission 6T51 (Gen. 3 6T40) Transmission 6 t45 (Gen. 1) Transmission


Related Parts

Required

Recommended

6T30 (Gen. 1), 6T30 (Gen. 2), 6T31 (Gen. 3 6T40), 6T35 (Gen. 3 6T40), 6T40 (Gen. 1), 6T40 (Gen. 2), 6T41 (Gen. 3 6T40), 6T45 (Gen. 1), 6T45 (Gen. 2), 6T46 (Gen. 3 6T40), 6T50 (Gen. 1), 6T50 (Gen. 2), 6T51 (Gen. 3 6T40) Oversized Actuator Feed Limit Valve 144740-01

6T30 (Gen. 1),6T30 (Gen. 2),6T31 (Gen. 3 6T40),6T35 (Gen. 3 6T40),6T40 (Gen. 1),6T40 (Gen. 2),6T41 (Gen. 3 6T40),6 t45 (Gen. 1),6 t45 (Gen. 2),6T46 (Gen. 3 6T40),6T50 (Gen. 1),6T50 (Gen. 2),6T51 (Gen. 3 6T40)

Oversized Actuator Feed Limit Valve144740-01

    Helps cure:
  • No 4th
  • No 5th
  • No 6th
  • Low clutch oil pressure
  • Harsh shifts
  • Flare shifts

Required

Recommended

6T30 (Gen. 1), 6T40 (Gen. 1), 6T45 (Gen. 1), 6T50 (Gen. 1) Zip Kit® 6T40-ZIP

6T30 (Gen. 1),6T40 (Gen. 1),6 t45 (Gen. 1),6T50 (Gen. 1)

Zip Kit®6T40-ZIP

    Helps cure:
  • Burnt clutches
  • Line pressure instability
  • Loss of fuel economy
  • 没有直线上升
  • Pressure loss
  • Pressure switch codes
  • Shift concerns
  • TCC apply & release concerns
  • TCC codes

Required

Recommended

6T30 (Gen. 2), 6T31 (Gen. 3 6T40), 6T35 (Gen. 3 6T40), 6T40 (Gen. 2), 6T41 (Gen. 3 6T40), 6T45 (Gen. 2), 6T46 (Gen. 3 6T40), 6T50 (Gen. 2), 6T51 (Gen. 3 6T40) Zip Kit® 6T40-GEN2-3-ZIP

6T30 (Gen. 2),6T31 (Gen. 3 6T40),6T35 (Gen. 3 6T40),6T40 (Gen. 2),6T41 (Gen. 3 6T40),6 t45 (Gen. 2),6T46 (Gen. 3 6T40),6T50 (Gen. 2),6T51 (Gen. 3 6T40)

Zip Kit®6T40-GEN2-3-ZIP

    Helps cure:
  • Burnt clutches
  • Line pressure instability
  • Loss of fuel economy
  • 没有直线上升
  • Pressure loss
  • Shift concerns
  • TCC apply & release concerns
  • TCC codes

Required

Recommended

6T30 (Gen. 1), 6T40 (Gen. 1), 6T45 (Gen. 1), 6T50 (Gen. 1) Remanufactured Valve Body GM6T40-1

6T30 (Gen. 1), 6T40 (Gen. 1), 6T45 (Gen. 1), 6T50 (Gen. 1)
Remanufactured Valve BodyGM6T40-1

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