Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

manual trans gears

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by joe84bb, Jun 21, 2000.

  1. joe84bb

    joe84bb Registered Member

    Joined:
    May 16, 2000
    Posts:
    45
    Likes Received:
    0
    Location:
    Florence, AL
    does anyone know what my individual gears are on a muncie getrag (lo, 1,2,3,od)? I'm leaning towards 4.11's but I sometimes have to hit the highway, & I don't wanna be screamin' @ 55. if I can find out what my trans is geared it will help out.

    I know just enough to know that I'll never know enough.
     
  2. Burt4x4

    Burt4x4 3/4 ton status

    Joined:
    Feb 17, 2000
    Posts:
    6,854
    Likes Received:
    0
    Location:
    California (Modesto area)
  3. Goose

    Goose 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,127
    Likes Received:
    1
    Location:
    South Central Kansas
    Isn't that a car transmission?
     
  4. JimmyDie6.2

    JimmyDie6.2 1/2 ton status

    Joined:
    Jun 20, 2000
    Posts:
    453
    Likes Received:
    0
    Location:
    Long Island
    I believe an M-20(wide ratio 4 speed) has a 2.42:1 first gear, and both the M-21 and M-22 the latter known as the "rock crusher" both have a 2.20:1 first gears. Which ones you will find in trucks (k5's) I have no clue. they all have 1 to 1 fourth gears. they are all aluminum cased trannys. Fine splinned steel T-10's are stronger than all the muncies because of their steel cases. I actually run one in my 68 big block camaro. no problems yet....
     
  5. tom

    tom 1/2 ton status

    Joined:
    May 20, 2000
    Posts:
    157
    Likes Received:
    0
    Location:
    So. Cal
    I've been looking for information on the GM getrag also. Was told by one trans shop that first gear is 4.3 and by another that it is 4.0. Fourth gear is 1:1 and fifth is 70% overdirve. I think this trans may be the same as an NV3500 but I'm not sure. I've driven one with 3.73's and 33" tires and it didn't rev up at all at 65 in OD. You would be fine with 4.11's.
    This transmission didn't last very long in the GM lineup. It is an aluminum case and doesn't have a good reputation for strength. How is it holding up behind the 454? Also, since it doesn't have the granny first, it's a pain in the rocks.
     
  6. joe84bb

    joe84bb Registered Member

    Joined:
    May 16, 2000
    Posts:
    45
    Likes Received:
    0
    Location:
    Florence, AL
    so for it's held up nicely. i am currently running 3.08's and i don't wanna buy some 3.73's and wish for 4.11's

    I know just enough to know that I'll never know enough.
     

Share This Page