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.

HELP - front universal/driveshaft for 1/2t to 3/4...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Jersey, Dec 20, 2001.

  1. Jersey

    Jersey 1/2 ton status

    Joined:
    Aug 14, 2001
    Posts:
    234
    Likes Received:
    0
    Location:
    NJ
    I just put in a 3/4 Dana44 from a '70 K20 with a 4" rancho lift (86206 springs) and am having problems with the front (stock slip) driveshaft length and front ujoint. The driveshaft seems too short and the 1/2 ton ujoint doesn't fit in the Dana44 yoke. Has anyone ran into this? Does napa or someone make a hybrid like the #447 i used for the rear - 1/2t driveshaft to 14bff? I lowered the tranfercase, front drive still seems too short by a hair, fully extended, sitting wheels on the ground. Here's something else if all else fails - can i put the yoke from my 10b on the D44 so i can just get a ujoint for 1/2 ton? This would solve the ujoint problem if i can do this but i'd still have the ds length problem. Any help is way appreciated. Had this whole truck lifted with new axles and wheels in one day and this is hanging me. and of couse, it starts flurrying out today! Go figure. Thanks in advance.

    - Jersey

    '91K5 - 350, 700R4, NP241, 14BFF/Dana44, FlowMasters, 4" & 35x14.50's on Welds
    <a target="_blank" href=http://community.webshots.com/user/len1313>[/b]PICS[/b]</a>
     
  2. BurbinOR

    BurbinOR 3/4 ton status

    Joined:
    Feb 17, 2000
    Posts:
    5,829
    Likes Received:
    0
    Location:
    Oregon
    The u joint should be #348 if the #447 didn't work.

    I put a 4" lift (Tuff Country HD) on my 79 K5, under the Dana 60 (adds 1" more apx) and didn't need to change driveshaft. Might be the pinion/snout length difference between the D44 and D60. I'm not sure what you mean when you say it's 'too short by a hair'. Are you saying it pulls out of the splines completely or just shows splines?

    <font color=blue>'79 ONE TON TPI K5 - See it at---&gt;<a target="_blank" href=http://www.blazzinor.rockcrawler.com>www.blazzinor.rockcrawler.com</a>
     
  3. Jersey

    Jersey 1/2 ton status

    Joined:
    Aug 14, 2001
    Posts:
    234
    Likes Received:
    0
    Location:
    NJ
    the rear #447 worked fine for the rear, just mentioned it because it was a hybrid to mate 1/2t ds with 14bff and wordered if napa or someone made something like this for what i need for the front. Or, are you saying the #447 might work for the front? I'm extending the DS as far as i possibly can by hand (have 2 of them so it's not related to just this one) and when the truck is on the ground, the ujoint doesn't reach the front axle. misses by about 1/2". I don't have the 2degree shim under the front axle because i wanted to run it first to see if i needed it for vibration, but i dont think the shim would help out that much anyway. Any other ideas? Thanks for the quick reply...

    - Jersey

    '91K5 - 350, 700R4, NP241, 14BFF/Dana44, FlowMasters, 4" & 35x14.50's on Welds
    <a target="_blank" href=http://community.webshots.com/user/len1313>[/b]PICS[/b]</a>
     
  4. surg82k5

    surg82k5 1/2 ton status

    Joined:
    Feb 7, 2001
    Posts:
    416
    Likes Received:
    0
    Location:
    San Antonio,Texas
    I am trying to deal with that right now i just put a post about help putting in shims, my front driveshaft is "a hair to short" fully extended. Actually about 3/4 an inch, the driveshaft place i went to said if i wantede shims would probably help, with the front and rear, so that is what i am goig to have to do, try shims..
    Sergio

    Check out my new website. <a target="_blank" href=http://www.surg82k5.rockcrawler.com>http://www.surg82k5.rockcrawler.com</a>
     
  5. nofeartruckin00

    nofeartruckin00 1/2 ton status

    Joined:
    Oct 5, 2001
    Posts:
    798
    Likes Received:
    0
    Location:
    Germantown, Wisconsin
    Just finished puting a front '73 3/4 ton D44 in my 91. The u-joint was the same one meant for the 10 bolt, but the straps to hold it down have to be the ones for the D44 yoke. The 10 bolt u-joint straps are slightly different. Are you using the straps for the D44 on the u-joint? Sorry, not much help.

    Mud...
     
  6. Jersey

    Jersey 1/2 ton status

    Joined:
    Aug 14, 2001
    Posts:
    234
    Likes Received:
    0
    Location:
    NJ
    didn't even get to the straps part. the caps on the 1/2 ton ujoint wont fit in the d44 yoke. the yoke on the d44 has ears on it to hold the caps on whatever ujoint fits in it, like the rear 14bff, so i dont think i need the inner snap ring type on the axle side of the joint. the 1/2ton ujoint is too wide to fit between the ears on the d44 yoke. i must be mising something. Anyone else with any ideas? Does anyone know if the napa#447 joint is a little thinner on the 3/4ton-1ton side? maybe i just need another one of these? surprised nobody else has come across this. guess i must be doing something wrong. anyone with the front driveshft shortness problem after a 4" susp lift? I'm sure the 2degree shim under the front axle would help, slightly and might allow me to just enough to bolt it up, but what happens when i droop the front end? Seems to me the driveshaft would want to yank itself right out of the transfer case. Any help on either of these "glitches" i've run into, is appreciated.

    - Jersey

    '91K5 - 350, 700R4, NP241, 14BFF/Dana44, FlowMasters, 4" & 35x14.50's on Welds
    <a target="_blank" href=http://community.webshots.com/user/len1313>[/b]PICS[/b]</a>
     

Share This Page