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best auto tranny for 3.1L?

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  • best auto tranny for 3.1L?

    What is the best auto tranny for the 3.1L engine??

  • #2
    What horsepower does it have to survive?

    For maximum effort your going to want the 4T60/65E
    For a stock or mildly modified engine I would choose the 4T40E since it is more reliable.
    1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
    1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
    Because... I am, CANADIAN

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    • #3
      4T65E with the 3.69 final drive. the 125C is a good tranny with the shift improver kit.
      Andy

      sigpic

      fastest 1/8: 10.19@ 67.17
      fastest 1/4: 16.16@ 82.70

      62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.

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      • #4
        I am hoping to build up my motor to 200 hp / 200 ft.lbs. torque. and I am wanting to do a little autocross, occasionally.

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        • #5
          the 125 will hold that just fine with that shift kit. it's a tough tranny. however, if you have the time and money for a 65E swap with gears, that'd be the way to go.
          Andy

          sigpic

          fastest 1/8: 10.19@ 67.17
          fastest 1/4: 16.16@ 82.70

          62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.

          Comment

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