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.

Total Drivetrain swap

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BlazerBoy, Apr 12, 2001.

  1. BlazerBoy

    BlazerBoy 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    639
    Likes Received:
    0
    Location:
    Chicago IL.
    O.k. if things go well I will be picking up a 77' K30 Sat. I am going to be swapping the axels inplace of my 10 bolts, and the sm465 & np205 inplace of my 700r4 & np208. I will have the whole truck so I will have the crossmember and linkage. I think I will have to use the front driveshaft out of the k30. But for the back shaft, I dont know if I can use mine. I dont know if the 205 is a fixed or a slip I havent seen it yet. I just had a custom CV shaft made for my current set up. My question is if the 205 is a slip yoke how much longer or short will this new configuration be? And if it is a Fixed yoke, I will need a whole new shaft right? Does anyone see any other problems I might run into swapping the entire drive train?? Thanks

    BlazerBoy
    http://generalblueballs.coloradok5.com
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,179
    Likes Received:
    1,387
    Location:
    E-town baby!
    I'm pretty sure the only year for the slip yoke 205 was '80. Your '77 should be a fixed yoke[​IMG] so it looks like you'll have to have a little driveshaft work done. I would get the K30's shaft shortened, its already got the right ends on it...the front should work fine.
    I just thought of one thing, you'll have to relocate the perches and shock mounts on the 14 bolt rear.

    Have fun

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>

    <P ID="edit"><FONT SIZE=-1>Edited by tRustyK5 on 04/12/01 10:24 AM (server time).</FONT></P>
     
  3. surg82k5

    surg82k5 1/2 ton status

    Joined:
    Feb 7, 2001
    Posts:
    416
    Likes Received:
    0
    Location:
    San Antonio,Texas
    what will you be doing with the 700 and 208, if your selling them or thinking about it i might be interested. Does the 700 run good. Thanks,

    Sergio
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    You should seriously consider finding a hydraulic clutch setup out of your vintage K5 before attempting the swap. (like when you are having the perches relocated)

    You are NOT going to like installing the mechanical linkage on your truck, since it was never designed for it. There is no dimple in the floor for the pushrod, there are not (at least on my '81 frame) any mounting points for the Z-bar, and the mechanical clutch linkage SUCKS compared to hydraulic.

    I'm pretty sure that you will not be able to install the Z-bar frame bracket without taking the body loose from the frame, unless the holes are already there..again, they weren't even drilled on my '81's frame, and the mechanical linkage was stock for '81.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  5. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    Yeah, sounds like your gonna have most everything you need except the clutch stuff (didn't realize that was a problem till I read the other post) and rear shaft which will need to be completely replaced I think.

    Good luck, sounds like fun. [​IMG]

    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.<P ID="edit"><FONT SIZE=-1>Edited by BadDog on 04/12/01 10:40 AM (server time).</FONT></P>
     
  6. BlazerBoy

    BlazerBoy 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    639
    Likes Received:
    0
    Location:
    Chicago IL.
    eeek I didnt know that I would have to move the shock mounts and pearches??? How hard is that to do? I wonder what it would cost to have that done? Will the Dana 60 bolt right in with no problems? So if you get the Hyd. clutch, which I am sure I will never find, I would need to get the slave cylinder with it right?? This is starting to sound like work.. eeekkkk

    BlazerBoy
    http://generalblueballs.coloradok5.com
     
  7. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    Yep, you'll probably need to get everything associated with the clutch from the pedal (?) to the slave cylinder. The springs on the rear of a 1 ton are set narrower than a 3/4 and 1/2 ton so the perches will need to be moved out a bit. You can get new perches from the dealership (I think) or make your own. I seem to remember a web article somewhere (couldn't find it) where someone made a new set of perches out of 1/4"x2"x2" (or something like that) square tubing. Shouldn't cost too much to have someone do it but I have no idea. Since you have got the 1 ton donor you should have all the D60 stuff you will need to hook it up to your K5.

    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56 Locked
    Soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    You can buy everything but the bellhousing from an auto parts store, (aren't cheap, probably say $200 to be safe fora ll but the bellhousing) and I believe the bellhousing is availble from Gm for an exorbitant amount. Has to be a truck bellhousing...someone tried to sell me one from a Camaro and there was no way it was the same. (slave cylinder mounting was different) I don't think the later car ones could even fit a 12" clutch in there anyway.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  9. BadDog

    BadDog SOL Staff Member Super Moderator Author

    Joined:
    Feb 24, 2001
    Posts:
    7,777
    Likes Received:
    11
    Location:
    Phoenix, AZ
    The hydro clutch requires a different bellhousing too? Well, I didn't know that. I thought it just had a bracket that bolted on to hold the slave. Ouch! I'll just stick to my TH400.

    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56 Locked
    Soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     
  10. BlazerBoy

    BlazerBoy 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    639
    Likes Received:
    0
    Location:
    Chicago IL.
    So is the mechanical linkage that bad? Or is is that bad because my truck wasnt set up with it? I dont have the truck yet so I havent looked into the conversion. What does is this Dimple on the floor for?? would it make it easier if I cut the floor out of the donor and put the floor in mine?? :) Thanks guys,,,

    BlazerBoy
    http://generalblueballs.coloradok5.com
     
  11. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    The mech. linkage IS that bad, AND your truck isn't set up for it. Some people don't have problems with the mech. linkage, I did. You don't need to cut the floor out, you have to punch a hole in it. Thats the least of your worries..inspect the donor truck as to how the linkage mounts on the frame, and you will see the difficult part will be mounting in that location.

    And yes, the Hydraulic bellhousing is hydraulic clutch specific, so they are kind of hard to find.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  12. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,179
    Likes Received:
    1,387
    Location:
    E-town baby!
    The mechanical linkage is not that terrible, mine has functioned reasonably well for the last 20 years...on the other hand I have driven a hydraulic clutched K5 (test drive) and the difference is remarkable. Much smoother engagement, and a much lighter feel to the clutch. With a hydraulic clutch I wouldn't hesitate to drive in rush hour traffic, with the mechanical clutch...well lets just say I like avoiding leg cramps.[​IMG]

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  13. thebigdaddyof2

    thebigdaddyof2 1/2 ton status

    Joined:
    Dec 28, 2000
    Posts:
    2,053
    Likes Received:
    0
    Location:
    St. Louis, Missouri
    Hey Blazerboy,
    You should let me drive up your way and take that D60 off your hands. Just send me a private and let me know what time to meet you. It should go to good use like in the front of Big Red.....You know it would be abused. Heh, heh.
    thebigdaddyof2
     
  14. fad2blk99

    fad2blk99 1/2 ton status

    Joined:
    Feb 19, 2001
    Posts:
    860
    Likes Received:
    0
    Location:
    Charleston, SC
    Hey, that swap isn't all that bad. I just swapped a '76 K-20 465/205 combo into my '88 K-5 originally equiped w/ a 700/208 combo. I went w/ the hyd clutch setup, and I strongly recomend you do the same. I can give you a complete run down of what you'll need and the best way to go about getting it. The local salvage yards will be your best friends! The pedal bracket assy.(the mechanical stuff won't work here either) and the bell housing are the two most difficult items to aquire and you can get each from the dealer for $200 or less. But let me know if you are still interested cuz its a lot to type (I'll give you my number or someting)
    Let me know and I'll hook ya up! -Tommy
     
  15. Brady

    Brady 1/2 ton status

    Joined:
    May 6, 2000
    Posts:
    628
    Likes Received:
    0
    Location:
    Parachute,Co
    Have any of you thought about a hydralic throwout bearing.This would save from buying the bellhousing.You would need a slavecylinder that mounted to the firewall and fab a linkage to it off of the old clutch pedal and run two lines down to the trans through the stock housing hole where the mech linkage goes and be done.Summit racing sells them for chevy trans.Brady

    '73Beautiful Disaster <A target="_blank" HREF=http://beautifuldisaster.coloradok5.com>http://beautifuldisaster.coloradok5.com</A>
     
  16. fad2blk99

    fad2blk99 1/2 ton status

    Joined:
    Feb 19, 2001
    Posts:
    860
    Likes Received:
    0
    Location:
    Charleston, SC
    Thats a new one on me?! Where were you 2 months ago! lol
    -Tommy
     
  17. zach78k5

    zach78k5 1/2 ton status

    Joined:
    May 14, 2000
    Posts:
    406
    Likes Received:
    0
    my 78 had a slip yoke, maybe not stock but i think it was. it was damaged so i replaced it with an old jeep wagoneer or something. had slipyoke and all. might be worth looking at a junkyard. it cost like 100 bucks with driveline after cutting and welding.
     
  18. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,179
    Likes Received:
    1,387
    Location:
    E-town baby!
    Ideally you want to do away with the slip yoke...that way you don't have a weak aluminum tail shaft housing and if you grenade the rear driveshaft you can chuck the shrapnel in the back and limp it home in Front wheel drive without loosing any fluid from the T-case.

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     

Share This Page