M30 Differential

  • amreboot
    amreboot
    Banned
    • 9875

    M30 Differential

    So I was at the junkyard and I saw a M30. I grabbed a few parts from it.
    On my way home, I thought about the differential on M30's.

    Are they VLSD?

    Of course I searched around on the net, but honestly, most of the info is very inconclusive.

    Does anyone know?
  • Richard_85ZXT
    Richard_85ZXT
    Senior Member
    • 1323

    #2
    what I'm finding is no and won't fit anyway

    http://www.zcar.com/70-83_tech_discu…_669371.0.html

    per wikipedia "The differential was a Nissan R200-type open differential."

    and the FSM for M30 propeller shaft and differential sections http://www.f31club.com/manual/propel…_differential/

    hope this helps
  • michaelp
    michaelp
    Senior Member
    • 9384

    #3
    My M30 has an open diff, unsure if all of them are open or not…but its likely that most of them are.
    - VG30DET (HE341) 86 300ZX - 1982 280ZX Turbo - Headered NA 1986 300ZX 2+2 - 2000 Xterra -
  • markjo
    markjo
    Junior Member
    • 25

    #4
    All M30 differentials are R200 and open, just confirming since I own one. Transmissions were all automatic and RE4R01A.
    1987 Nissan 300ZX GLL
    "Hot Red" #526
    ~83,650 miles
  • NissanEgg
    NissanEgg
    Senior Member
    • 5220

    #5
    FSM pic shows it to be a long nose R200. Don't see why it won't fit.

    1986 300ZX Turbo…sold
    1990 Skyline GT-R…new money pit
    2014 Juke Nismo RS 6-speed…daily
  • amreboot
    amreboot
    Banned
    • 9875

    #6
    It'll fit but the problem is that this R200 long nose has an ABS sensor which makes the snout 1" longer. So, it'd be a tight fit for the drive shaft.
  • wire
    wire
    Junior Member
    • 16

    #7
    M30 differential is a 4 pinion open type.

    If you swap over the proper companion flange from another R200 such as Z31, 280zx turbo, you find the dimensions are the same.

    It's the m30 specific flange that is longer.
  • michaelp
    michaelp
    Senior Member
    • 9384

    #8
    wire wrote: M30 differential is a 4 pinion open type.

    If you swap over the proper companion flange from another R200 such as Z31, 280zx turbo, you find the dimensions are the same.

    It's the m30 specific flange that is longer.
    87-89 Z31 R200s are identical to M30 R200s.......
    - VG30DET (HE341) 86 300ZX - 1982 280ZX Turbo - Headered NA 1986 300ZX 2+2 - 2000 Xterra -
  • wire
    wire
    Junior Member
    • 16

    #9
    Dimensions are the same but not completely identical.

    The M30 has an ABS sensor that mounts on a machined surface at the snout of the differential which samples the teeth of the "wheel" that is part of the M30 flange.

    The difference is important to S30 drivers because it will hit a crossmember but the z31 crowd won't have that issue.
  • Silli
    Silli
    Junior Member
    • 15

    #10
    michaelp;291404 wrote: 87-89 Z31 R200s are identical to M30 R200s.......
    That is true. I have 2 diffs. One is factory fitted R200abs and other is M30 -92 R200abs. Only differences are gearing, finned cover and hole on top of diff for oil circulation cooling system. I am talking about euro spec 2+2 -89.