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.

203 or 205?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ScoobyDann, Mar 29, 2001.

  1. ScoobyDann

    ScoobyDann 1/2 ton status

    Joined:
    Mar 9, 2001
    Posts:
    305
    Likes Received:
    0
    Location:
    El Paso, TX (Far West Texas near Las Cruses
    i now you get this question all the time, but i found a transfer case for $20, it has no tags and its cast iron and still has an adapter on it. Can anyone tell me some definate signs to tell weather it is a 205 or 203 and how can you tell if it cam off a ford, chevy or dodge please help
    check out http//:www.jimjim.coloradok5.com
     
  2. slider79blazer

    slider79blazer 1/2 ton status

    Joined:
    Mar 23, 2001
    Posts:
    164
    Likes Received:
    0
    Location:
    littleton,co.
    usually a 203 is full time 4 wheel drive. if you turn the rear
    yoke the front should turn also. Unless there is a part time
    kit in it.I don't know much about them yet but mine is a 203
    and it's cast iron.
     
  3. Goose

    Goose 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,127
    Likes Received:
    1
    Location:
    South Central Kansas
    Turn the input shaft and see what turns. If both output shafts turn it could be a 203, or a 205 with cold gear oil. Hold onto one of the outputs and see if there is a solid connection. Try to visualize what would be turning when and run through the gear selector. How do you know it's a 203 or 205? There are other cast iron cases that were used by early GMs.

    [​IMG]
     
  4. prjt_blzr

    prjt_blzr 1/2 ton status

    Joined:
    Mar 4, 2001
    Posts:
    352
    Likes Received:
    0
    Location:
    COS, CO
    The 203 has a double aluminium tail housing. The rear output for the 203 has a large aluminium section for the differential. The 205 does not have this. The 205 is lighter and smaller than the 203. If I remember correctly the 205 weighs about 100lbs. The 203 is in the 130lb range. If you want to do some work to verify the case, remove the side cover from the case. you will either see a chain (203) or just gears (205). The other check is to remove the rear yoke and housing to see if there is a differential behind it if you are not familiar with the cases.
     
  5. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    The 205 is much shorter, all cast iron, and has a PTO mount (I don't think the 203 has that but not sure). Look around in some of the articles here and at ORC and I'll bet you can find pictures of the 205. Hmm, ORD has a pic of one behind a 203 gear box (t-case minus aluminum housing) in their doubler pictures...
    <A target="_blank" HREF=http://www.offroaddesign.com/catalog/doubler.htm>http://www.offroaddesign.com/catalog/doubler.htm</A>
    The 205 is on the right, the front half of a 203 is on the left.

    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56
    Coming soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     
  6. Emmettology 101

    Emmettology 101 3/4 ton status

    Joined:
    May 9, 2000
    Posts:
    8,126
    Likes Received:
    0
    Location:
    FL
    The 203 looks like two t-case bolted to gether. It has a range box and the gear box. The 205 is one box.

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>

    "Pimpin aint easy!"
     

Share This Page