Rear Control Arms

Discussion in 'Frame / Chassis / Suspension' started by mikester, Jun 14, 2018.

  1. mikester

    mikester G-Body Guru

    Joined:
    Mar 10, 2010
    Messages:
    701
    Likes Received:
    443
    Trophy Points:
    63
    Location:
    Small town NY
    Ive got my wagon up on stands and Im getting ready to yank the rear out. Ive been looking at the different options as far as control arms. Leaning towards the UMI non adjustable tubulars since its for the wagon and Im not going to be beating the crap out of it.
    What about the extra reinforcement bars ? I have them in my coupe but thats all Hotchkis. Should I bother ? I see the UMI reinforcement bars are adjustable. Should I look for a non adjustable set instead ? Whats everyone think ?
    You folks always have good advice.
     
  2. melloelky

    melloelky G-Body Guru

    Joined:
    Oct 22, 2017
    Messages:
    501
    Likes Received:
    336
    Trophy Points:
    63
    Location:
    mass
    you're on the rite track,if you're not concerned about changing pinion angle then stick with the non-adjustable arms.keeping it simple is best..everyone's different,i think any time you can triangulate something it'll make it stronger,i think the only reason those braces are adjustable is to compensate for "manufacturing tolerances" between chassis'/fitment etc.i can't imagine they're adjustable to introduce a large amount of pre-load into that section of chassis.my .02 i like them
     
    • Agree Agree x 2
  3. 403Olds

    403Olds Master Mechanic

    Joined:
    May 31, 2014
    Messages:
    283
    Likes Received:
    50
    Trophy Points:
    28
    Location:
    South Central Ohio
    I’ve put the non-adjustable in two cars, I haven’t seen a downside to them.
     
  4. Wraith

    Wraith G-Body Guru

    Joined:
    Jan 13, 2013
    Messages:
    685
    Likes Received:
    990
    Trophy Points:
    93
    Location:
    DFW, TX
  5. fleming442

    fleming442 Comic Book Super Hero

    Joined:
    Dec 26, 2013
    Messages:
    2,651
    Likes Received:
    959
    Trophy Points:
    113
    I was under the impression that the upper frame mounts should remain flexible, either through the use of rod ends/roto joints or flimsy factory arms..... The Speedway arms look beefy in that area; how do they ride?
     
  6. timo22

    timo22 G-Body Guru

    Joined:
    Sep 10, 2012
    Messages:
    600
    Likes Received:
    551
    Trophy Points:
    93
    Location:
    St. Louis,Mo
    If you are looking for a less expensive solution , you might consider lower rear control arms out of a 2000 or so Camaro or Firebird. They are the same size as Gbodys and can be had pretty much rust free with 20 year newer bushings . A great candidate for boxing yourself..
    timo22
     
    • Like Like x 2
    • Informative Informative x 1
  7. Wraith

    Wraith G-Body Guru

    Joined:
    Jan 13, 2013
    Messages:
    685
    Likes Received:
    990
    Trophy Points:
    93
    Location:
    DFW, TX
    I can't say how they ride, maybe in 2019 or 2020 lol. I did use roto joints from Speedway on the uppers though.
     
    • Funny Funny x 1
  8. pontiacgp

    pontiacgp Canadian Prime Minister

    Joined:
    Mar 31, 2006
    Messages:
    22,088
    Likes Received:
    3,172
    Trophy Points:
    113
    Location:
    Kitchener, Ontario
    you are correct, here is an upper from a G body that we boxed just to see if it helped with lap times. The hole was a 1/2" round when we started....

    binding.jpg
     
    • Like Like x 2
    • Informative Informative x 1
  9. mikester

    mikester G-Body Guru

    Joined:
    Mar 10, 2010
    Messages:
    701
    Likes Received:
    443
    Trophy Points:
    63
    Location:
    Small town NY
    I think I'll just use the non adjustable tubular arms from UMI without the extra reinforcement bars. I didnt want the adjustable reinforcement bars to begin with and the four new arms will probably be an improvement over the originals anyway. I even considered buying the extra bars from BMR but since I need to spend a little more on parts I figured I'd just do without them.
     
  10. Zspoiler

    Zspoiler Not-quite-so-new-guy

    Joined:
    Jun 3, 2018
    Messages:
    45
    Likes Received:
    10
    Trophy Points:
    8
    I have Hotchkiss non adjustable trailing arms on mu 1981 El Camino with now issues. There is a kit out there to box your stock ones for about $20.00 from Original Parts Group .For another option.
     
Loading...
Similar Threads - Rear Control Arms Forum Date
Rear lower control arms Frame / Chassis / Suspension Feb 21, 2018
UMI Upper rear adjustable control arm adjustment Frame / Chassis / Suspension Feb 11, 2018
Rear control arm question Frame / Chassis / Suspension Dec 24, 2017
Rear suspension upgrade advice Frame / Chassis / Suspension Today at 1:27 AM
Rubber Bumpers 7.5 Rear Frame / Chassis / Suspension Sunday at 1:32 PM

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice