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208 to 205

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Rollingthunder, Apr 25, 2001.

  1. Rollingthunder

    Rollingthunder Registered Member

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    Slaton, Texas
    I have a TH700 and a 208 transfer case. I am wanting to swap the 208 for a 205. Will the trany and new transfer case match up or will I need some extras? And what change in abilities should I expect after the swap?
     
  2. kpanza

    kpanza 1/2 ton status

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    Well, for one, you are going to miss the low gearing of the 208! You'll be going from about 2.6-1 Low to only 1.96-1 Low...But, the 205 will last longer and take more abuse - maybe you should think about the Doubler setup from ORD, that's what I am planning on doing...
     
  3. elkboy

    elkboy 1/2 ton status

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    You will need a 205 case and transmission adpater out of a K series with a TH350. Adavance adapters and ORD sell a adapter output shaft for your 700R4 to mate with the 205 .

    [​IMG]<font color=red> Elkboy</font color=red> [​IMG]
     
  4. Wheels

    Wheels 1/2 ton status

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    Advanced adaptors and Fitzall both make the output shaft for the 700R4. The correct output shaft sticks out .875" from the back of the tranny. Advanced Adaptors price is right at $170. Depending on the type of 205 you get (slip or fixed) you'll need to have the driveshafts resized. Also, the tranny pan will have to be modified on the back right hand corner to allow room for the front drive shaft (can use a body hammer and reshape it or cut it and weld in a new section.
     
  5. sb7979

    sb7979 Registered Member

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    Don't you have to tear the tranny all the way apart to swap the output shaft? Or am I mistaken? In that case the $170 shaft is the least of the problem, unless you're comfortable tearing your automatic apart.
     
  6. ftn96

    ftn96 1/2 ton status

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    Yep, the output shaft is the first thing that goes in and the last thing to come out. Its all the way back there.

    Will work for beer, parts and tools.
    90-350TBI-TCI700-241-33"-10/12 bolt w/4.10's,
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  7. ftn96

    ftn96 1/2 ton status

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    Personally I think you would be better off calling Jesse at 530-872-5725and get yourself a slip yoke Eliminator kit and a CV 1/2 or 1 ton driveshaft and keep your 208. I like the 208 and 241 best. Yeah, they aren't bulletproof but are your doing MAJOR rock crawling?

    Will work for beer, parts and tools.
    90-350TBI-TCI700-241-33"-10/12 bolt w/4.10's,
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  8. ftn96

    ftn96 1/2 ton status

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    Let me restate something. There aint nothin thats bulletproof. Us Navy boys can break anything. LMFAO!!!!!
    Seriously though, just be honest with yourself and your truck. You will be loosing some serious low gearage.

    Will work for beer, parts and tools.
    90-350TBI-TCI700-241-33"-10/12 bolt w/4.10's,
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  9. HarryH3

    HarryH3 1 ton status Author

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    I've heard that you guys can break an anvil with nothing but a rubber hammer. [​IMG] [​IMG] [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
    It's a great day to be alive...
     
  10. 83ZZ502_Jimmy

    83ZZ502_Jimmy 1/2 ton status

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    I use the 208 in my race truck and in my Jimmy. The Race truck has 600+/- Rear Wheel HP. The jimmy has a zz4 crate motor. No problems with either one. Just make sure you keep it full of fluid.

    '83 GMC Jimmy 4x4 ZZ4 Crate Motor
    '84 Chevy P/U 4x4 Sand Drag Racer, 578 RWHP
    '94 Impala SS
    '93 Chevy P/U 4x4 454tbi
     

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