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.

Axle tubes and u-bolts

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Leadfoot, Jan 23, 2002.

  1. Leadfoot

    Leadfoot 1/2 ton status Premium Member

    Joined:
    Nov 28, 2000
    Posts:
    3,112
    Likes Received:
    1
    Location:
    Western Massachusetts
    I have been looking for new u-bolts, last time I bought new one's I went to a local blacksmith who custom made them while I waited. He is no longer in business and I decided to order from an online source. I went to BDS and Heckethorn and they list all 5/8" u-bolts as being either 3 1/2" or 3 5/8" while my 14FF is 3 3/8". If I go with 3 1/2 it won't fit around my axle tube and if I go 3 5/8 I will have to "squish" them 1/4". Am I missing something, and are there any manufacturers that make a 3 3/8" ubolt (5/8" diameter)?

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    SUPERLIFT.

    They have them. I have gotten quite a few of them in that size many times before.

    If you want, I can get you some new u-bolts from Inland Truck Parts. They will cost around $40 for 4 of them.

    If you go with ITP, at least they will bend the u-bolts to YOUR specs.

    Give me some measurements and I can get you some if you want.

    Or, tell me what length you need and I will look in my Superlift catalog and get you the part number so you will have it ready when you call them. [​IMG]



    <font color=red>Only real men drive K30's!!!</font color=red> [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  3. bigmack

    bigmack 1/2 ton status

    Joined:
    Jan 3, 2002
    Posts:
    478
    Likes Received:
    0
    Location:
    Tennessee
    If I am doing the math right the 3-1/2" U-bolt should fit with 1/8" to spare. Let us know how it works out I am putting a 14BFF in my truck next week &amp; will need new U-bolts too.

    '80 K10 350/350/NP205/12B/10B/4"Lift/Q78-Buckshots
     
  4. Leadfoot

    Leadfoot 1/2 ton status Premium Member

    Joined:
    Nov 28, 2000
    Posts:
    3,112
    Likes Received:
    1
    Location:
    Western Massachusetts
    Wes,
    Thanks for the quick response, I will let you know.

    bigmack,
    You are correct, Brain Fart on my part [​IMG]. 1/8" should be negligable (read un-noticeable). My question is why Heckethorn recommended the 3 5/8" wide u-bolts for me [​IMG], when I told them I had a 3/4 ton with a 14FF?

    Also it has me wondering. I told them I wanted the highest rate rear springs they had (52" eye to eye). They said it was a 6 leaf spring pack p/n 8200 (not listed in their online catalog) which are $90 each. That is an awesome price compared to others I have seen $200+ each. The question is what kind of quality am I getting for $90. You usually get what you pay for so it has me hesitant to order from them, yet I have heard several people recommend them. I want a high rate for pulling. I had a lot of spring wrap with the blocks even with kicker shocks and don't mind if they ride stiff. I also would like to get my u-bolts from them as they are zinc coated, but now I'm starting to reconsider.

    Thanks for the responses, and I welcome any more.

    P.S. What axle would take a 3 5/8" u-bolt?...a D70 or the thick wide u-bolt of a D44 or 10 bolt...never really measured, but curious?

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  5. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    Chris, the D44 and 10 bolt front axles both take the 3 5/8" u-bolt on the pumpkin side. Just that one u-bolt that goes around the larger part of the housing where the spring sits. All the other 3 u-bolts are the same size.

    So, yeah, the 3 5/8" is for the front axles. [​IMG]



    <font color=red>Only real men drive K30's!!!</font color=red> [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  6. Leadfoot

    Leadfoot 1/2 ton status Premium Member

    Joined:
    Nov 28, 2000
    Posts:
    3,112
    Likes Received:
    1
    Location:
    Western Massachusetts
    Wes,
    Thank you yet again!

    bigmack,
    I will let you know what they say when I call and order.

    Chris

    Getting wiser by the day! [​IMG]

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  7. laketex

    laketex 3/4 ton status

    Joined:
    Feb 17, 2000
    Posts:
    6,220
    Likes Received:
    0
    Location:
    North Texas
    Hey i need new u bolts for my 14FF too. The ones that i got from ORD stripped out. I was wondering If It'd matter if I went up to 3/4 diameter and something in a coarser thread? I just think fine thread goobers up too easily.

    Sherman, Tx
    <font color=red>The blazer's almost on the road....anyone got tree fiddy?</font color=red>
     
  8. Leadfoot

    Leadfoot 1/2 ton status Premium Member

    Joined:
    Nov 28, 2000
    Posts:
    3,112
    Likes Received:
    1
    Location:
    Western Massachusetts
    I will let everyone know what I get and size. As far as fine vs course thread. Fine thread can "goober" up easier especially from physical damage (rocks, hammer, etc.) or over-torquing, but when properly torqued I prefer fine vs course as it is less likely to vibrate loose and if it does it usually takes longer to completely come off due to more contact area.

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     

Share This Page