m22Z autogear

Discussion in 'Transmission & Driveline Topics' started by David Miotto, Sep 16, 2019.

  1. David Miotto

    David Miotto New Member

    Messages:
    1
    Likes Received:
    0
    Joined:
    Dec 6, 2018
    Would love to hear any opinion regarding ;
    1970 z28 c/w m20 , 3:73 , 3000 rpm at 60 mph ,not very highway friendly.

    trying to decide to go to a m22z auto gear c/w with a 3:23 rear ratio.
    approx. 2450 at 60mph.

    Will obviously keep the m20 and 373 for the originality,but want a little more hwy cruise comfort with the new setup.

    Should still have nice punch out the hole with new setup.
    Bottom line close to $5 grand for 500rpms ??

    David
     
  2. G72Zed

    G72Zed Veteran Member

    Messages:
    1,028
    Likes Received:
    217
    Joined:
    Sep 8, 2015
    Location:
    Canada
    For that initial cost, perhaps a 5spd w/OD would be a potential option to look into. keep your rear end/gear intact.
     
  3. big gear head

    big gear head Veteran Member

    Messages:
    6,167
    Likes Received:
    76
    Joined:
    Jul 30, 2001
    Location:
    Central City, Ky.
    I'm running a M23Z in my Camaro with a 3.70 gear and 31 inch tall tires. Works well for me.
     
  4. COPO

    COPO Veteran Member Lifetime Gold Member

    Messages:
    17,640
    Likes Received:
    653
    Joined:
    Sep 15, 1999
    Location:
    Ontario, Canada
    4th gear is 1:1 ratio in the M20, M21 and M22 factory Muncie's. I take my daily driver for long highway runs instead of my 70 Z28 and I won't cut the floor for a 5 spd. I've owned mine since 1981, why change now is what I tell myself.

    $5 G's for 500 rpm, that isn't the way to go. With that 5 Grand, if I were you, I'd buy a 5 speed.
     
    Last edited: Sep 16, 2019
  5. czizza

    czizza Veteran Member

    Messages:
    997
    Likes Received:
    49
    Joined:
    Jan 8, 2004
    Location:
    N. Massapequa, NY, USA
    I had a 79 with ST10 and 3.73 first gear was 2.82; I swapped out for a TKO500 a new cross member and driveshaft and I have .68 OD ... it is strong enough for me to drop the clutch at 5K and pull the wheels up 2-3 inches.

    [​IMG]
     
    dave@ztech likes this.
  6. 76z28

    76z28 Veteran Member

    Messages:
    1,989
    Likes Received:
    43
    Joined:
    Jun 29, 2009
    Location:
    bakersfield
    I love my 6 speed :D
     
  7. Dave Nelson

    Dave Nelson Veteran Member

    Messages:
    4,235
    Likes Received:
    1,960
    Joined:
    Dec 19, 2003
    Location:
    Vineland N.J USA
    Keep the Muncie and go with 3:07 or 3:08 gears.
     
  8. xten

    xten Veteran Member

    Messages:
    2,732
    Likes Received:
    1,499
    Joined:
    Sep 24, 2014
    Location:
    Pittsburgh, Pa.
  9. Dave Nelson

    Dave Nelson Veteran Member

    Messages:
    4,235
    Likes Received:
    1,960
    Joined:
    Dec 19, 2003
    Location:
    Vineland N.J USA
    Keep in mind if you go with Gearvendors you will need to cut the tunnel brace for clearance.
     
  10. G72Zed

    G72Zed Veteran Member

    Messages:
    1,028
    Likes Received:
    217
    Joined:
    Sep 8, 2015
    Location:
    Canada
    That combo would give an overall first gear ratio of 6.77, not good, but 4th gear with the 3.08 would be great.

    That's why I mentioned the 5spd w/OD. The Richmond SS or TKO600 would be like having a 4.85/88 first gear and a 2.87 in 5th for the Richmond, or 3.06 with the TKO's .82 OD.

    And for the extra $750 vs the GV, no floor cutting/pinion angle issues with the Richmond.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.