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.

what trans/case in a 73 K5?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by beater_k20, Dec 26, 2003.

  1. beater_k20

    beater_k20 Banned

    Joined:
    Dec 9, 2003
    Posts:
    10,276
    Likes Received:
    0
    Location:
    Elkhart, IN
    i came across a guy with a complete drivetrain out of a 73 K5 for sale real cheap. he has a Dana 44 front, a 12 bolt rear. both have 4.10 gears, and the rear has a posi. he's not real sure which trans and case he has though. the trans is a 3 speed manual, and the case is a part time unit. i assume the case is a 205, but what about the trans? assuming it is a 205, what other trans could i bolt to this case if the 3 speed isnt worth a crap?
     
  2. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

    Joined:
    Aug 28, 2002
    Posts:
    9,097
    Likes Received:
    144
    Location:
    california
    It's like an SM 420 or 435, I think one of those is a 3spd. I would swap it out for an SM 465 4spd and yeah I would bet that the t-case is a 205. I find the 4.10's in the 1/2ton running gear interesting. /forums/images/graemlins/thinking.gif
     
  3. Corey 78K5

    Corey 78K5 1 ton status

    Joined:
    Feb 17, 2000
    Posts:
    13,055
    Likes Received:
    0
    Location:
    Humboldt County, CA
    [ QUOTE ]
    Year:: 1973 Production Total: 44,841
    Base Price: 3,200 Weight: 3,912
    Wheel Base: 106.5 in. Fuel Tank Capacity: 20-gallon/31-gallon
    Length: 184.5 in. Height: 71.5 in.
    Std. Engine, (net HP):
    OHV Six-cylinder 250 cid. (100) @ 3600 rpm






    Opt. Engine, (net HP):
    OHV Six-cylinder 292 cid. (120) @ 3600 rpm

    OHV Eight-cylinder 307 cid. (115) @ 3600 rpm

    OHV Eight-cylinder 350 cid. (155) @ 4000 rpm

    Rear Axle:
    GM Corporate 12-bolt (8.7/8-in. 1.31 Axle Dia. 30 Spline)
    Front Axle:
    Dana 44 (8.5-in. 1.31 Axle Dia. 30 Spline)

    Transmission (M):
    SM318/SM326/SM330/T-89A/T-150 3 spd. (2.47-3.50:1 First Gear)

    SM465 4 spd. (6.55:1 First Gear)
    Transmission (A):
    TH350 (2.52:1 First Gear)





    Transfer Case (M):
    NP205 (1.96:1 Low Range)

    Dana 20 (2.03:1 Low Range)
    Transfer Case (A):
    NP203 (2.01:1 Low Range)





    [/ QUOTE ]
    According to this from the spec page the 73 came with at least 5 3-speed trannys and most likely it would be a Dana 20 t-case.
     
  4. 75-K5

    75-K5 3/4 ton status

    Joined:
    Apr 28, 2002
    Posts:
    5,353
    Likes Received:
    0
    Location:
    Anderson, Indiana
    Yeah those 3-speed trannies are a clusterfuc that's for sure. I think Randy (R72K5) has verified in the past that the Blazers got the SM330's. My vote would be that it is a np205. The 3-speeds are OK, though, I wouldn't take it out unless it's having major problems. Still better than an auto! (see below /forums/images/graemlins/rotfl.gif)
     
  5. 75-K5

    75-K5 3/4 ton status

    Joined:
    Apr 28, 2002
    Posts:
    5,353
    Likes Received:
    0
    Location:
    Anderson, Indiana
    [ QUOTE ]
    It's like an SM 420 or 435

    [/ QUOTE ]

    Just FYI, the sm420 quit going in trucks (I think it even stopped production) in 1967. 68 was the first year for the 465. I don't know of a sm435, but there was a np435, which is a good tranny from what I've heard.
     
  6. R72K5

    R72K5 Banned

    Joined:
    Mar 5, 2001
    Posts:
    8,905
    Likes Received:
    0
    Location:
    central IL
    [ QUOTE ]
    It's like an SM 420 or 435, I think one of those is a 3spd. I would swap it out for an SM 465 4spd and yeah I would bet that the t-case is a 205. I find the 4.10's in the 1/2ton running gear interesting. /forums/images/graemlins/thinking.gif

    [/ QUOTE ]


    those are four speeds, both... 420, 465, 435, 435cr, etc

    the thre speed were the sm330, those are the 4x4 version 4 speed, the 326 and 318 were the 2wd three speeds


    dana 20 was done after 73
    dana 20 was in 67-72 years, although i dont thnk all six years, ou mainly saw dana 20 in the jeeps and such, but GM decided to use tem for a few years also, heh
     
  7. R72K5

    R72K5 Banned

    Joined:
    Mar 5, 2001
    Posts:
    8,905
    Likes Received:
    0
    Location:
    central IL
    [ QUOTE ]
    [ QUOTE ]
    It's like an SM 420 or 435

    [/ QUOTE ]

    Just FYI, the sm420 quit going in trucks (I think it even stopped production) in 1967. 68 was the first year for the 465. I don't know of a sm435, but there was a np435, which is a good tranny from what I've heard.

    [/ QUOTE ]

    yes, very correct., 420 were from 47-67, they are the old school


    465 from 68-88

    and arent three speed anyways so dont apply here
     
  8. Blazer1970

    Blazer1970 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,600
    Likes Received:
    0
    Location:
    Old Mission, MI
    The CK5 specs that Corey posted above are correct, the Dana 20 was still used behind 3 speed manuals in '73 (in Blazer/Jimmy only, Dana 20 was never used in GM trucks). I would bet that is what that Blazer has.
     
  9. 87BrnRsd

    87BrnRsd 1/2 ton status

    Joined:
    Apr 21, 2003
    Posts:
    2,457
    Likes Received:
    0
    Location:
    Boone, North Carolina
    [ QUOTE ]
    I find the 4.10's in the 1/2ton running gear interesting. /forums/images/graemlins/thinking.gif

    [/ QUOTE ]
    I dont think that is odd at all. My brother has a 79, with the original sales brochure, and it lists 4.10's as standard for that year. He luckily got the option of having 3.08's. /forums/images/graemlins/rotfl.gif Those got changed out real quick after he found out they were so high. /forums/images/graemlins/rotfl.gif /forums/images/graemlins/thumb.gif
    -Harrison
     
  10. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

    Joined:
    Aug 28, 2002
    Posts:
    9,097
    Likes Received:
    144
    Location:
    california
    [ QUOTE ]
    [ QUOTE ]
    It's like an SM 420 or 435

    [/ QUOTE ]

    Just FYI, the sm420 quit going in trucks (I think it even stopped production) in 1967. 68 was the first year for the 465. I don't know of a sm435, but there was a np435, which is a good tranny from what I've heard.

    [/ QUOTE ]I don't know a lot about manuals especially outside of an sm465 or nv4500. I stick with automatics. /forums/images/graemlins/wink.gif NP instead of SM 435... oops, picky aren't we. /forums/images/graemlins/smile.gifj/k /forums/images/graemlins/rotfl.gif
     
  11. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

    Joined:
    Feb 17, 2000
    Posts:
    7,385
    Likes Received:
    0
    Location:
    Atlanta
    Well if it's truely a 3 speed then it would have to be the 330/20 set up. I just didn't know they ran that in 73 at all. My bud had a 71 that had that set up factory and he ditched it for a 700R4 with vett servos and a 208.

    Now a LOT of people call 465's 3 speeds with granny. Maybe what it actually has.
     
  12. 75-K5

    75-K5 3/4 ton status

    Joined:
    Apr 28, 2002
    Posts:
    5,353
    Likes Received:
    0
    Location:
    Anderson, Indiana
    [ QUOTE ]
    I stick with automatics.

    [/ QUOTE ]

    Pun intended? /forums/images/graemlins/rotfl.gif /forums/images/graemlins/thumb.gif

    [ QUOTE ]
    Now a LOT of people call 465's 3 speeds with granny

    [/ QUOTE ]

    Oh I hate when people do that, especially my Dad. I called the parts store needing something once and I told them I had a sm465 4-speed and he said "NO, it's a TOP LOADER 3-SPEED!!!" /forums/images/graemlins/rotfl.gif Refuses to believe me that they're one and the same.
     

Share This Page