Jatco 3N71B/4N71B (automatic trans) buildup information


  • #16
    whats torque spec?ive looked around on google but not much comes up..
    Straya, +61

  • #17
    `

  • #18
    Something went wrong somewhere,theres not enough pressure so once the fluid warms up it slips terribly.Gonna rip out the transmission today and put in the spare and leave it at that.What a waste of effort :-(
    Straya, +61

  • #19
    was this a non-turbo auto?

  • #20
    I belive its for both
    1989 300ZX 2+2 N/A GLL
    Auto to Manual Swap
    NA2T Complete

  • #21
    Turbos got a stronger tranny.

    In terms of the 3n71b, you got more friction material and thicker output shaft.

    I don't remember if the 4n71b got a thicker output shaft but I do know it has more friction material so the turbo implementations would be better starting points.

  • #22
    There are also some 4n71b with 4 planets instead of 3.

    I believe one can peice together the strongest possible 4n71b using parts from both the RX-7 version and the Z31 version.

  • #23
    x

  • #24
    Are these directions for building the auto trans into a manual shift?
    Black 1986 300zx Turbo coupe (Chuki)
    http://z31performance.com/showthread…86-Turbo-Coupe
    ----------------------------------------------------------------------------------------------------------------
    Pewter 1986 300zx N/A 2 Turbo 2+2 (Chuki)
    http://z31performance.com/showthread…9;s-1986-300zx

  • #25
    x

  • #26
    Are there any other supporting mods that that must be done to use this valve body? Vacuum modulator and or governor circuit?
    Black 1986 300zx Turbo coupe (Chuki)
    http://z31performance.com/showthread…86-Turbo-Coupe
    ----------------------------------------------------------------------------------------------------------------
    Pewter 1986 300zx N/A 2 Turbo 2+2 (Chuki)
    http://z31performance.com/showthread…9;s-1986-300zx

  • #27
    v

  • #28
    how much?
    87 Turbo: Stock VG33, stock cams, maxima intake, T5, DXD stage 3 clutch, tubular stainless headers, GT3582r, full 3" stainless exhaust, E85 680cc inj. and Nistune
    current time: 13.39@106, 2.05 60' 12psi with old stock 85T motor and street tires!

  • #29
    a

  • #30
    What holes were blocked off on the separator plate?
    When you say the modulator is disconnected, is it just as simple as disconnecting the vacuum line?
    Black 1986 300zx Turbo coupe (Chuki)
    http://z31performance.com/showthread…86-Turbo-Coupe
    ----------------------------------------------------------------------------------------------------------------
    Pewter 1986 300zx N/A 2 Turbo 2+2 (Chuki)
    http://z31performance.com/showthread…9;s-1986-300zx