LCA doesn't look right

Suspension, Steering and Chassis

  1. charliec

    charliec FABO Gold Member FABO Gold Member

    Messages:
    166
    Likes Received:
    121
    Joined:
    Jun 13, 2017
    Location:
    richmond texas
    Local Time:
    10:08 AM
    I am installing my new bushings and pivot into the LCA's and putting them into the Kmember.
    20180810_162933.jpg
    Bushings and pivots went in ok, but when I put the assembly into the Kmember, it just doesn't look right. The passenger side looks great, but the driver side looks like it is not at the proper angle relative to the Kmember. It looks like it is slightly cocked toward the front. I know these are not precision machined components and are generally very sloppy, but I can't imagine that this is OK. The one on the passenger side is straight and true. The one on the driver side looks like its been beat to hell and seems twisted.
    Am I screwed, or will all come into place once all the rest of the suspension parts are in place?
    20180810_163109.jpg
    20180810_163119.jpg 20180810_163309.jpg
    Difference between passenger side and driver side is noticable.
    Passenger:
    20180810_163153.jpg
    Driver:
    20180810_163143.jpg
     
  2. TrailBeast

    TrailBeast Slightly Twisted Member

    Messages:
    19,499
    Likes Received:
    5927
    Joined:
    Mar 11, 2011
    Location:
    Arizona
    Local Time:
    8:08 AM
    The A arm looks bent to me.
    The strut rod will probably push it into semi place, but still.

    20180810_163109.jpg
     
  3. dogbreath

    dogbreath Well-Known Member

    Messages:
    229
    Likes Received:
    43
    Joined:
    Nov 29, 2009
    Local Time:
    10:08 AM
    bent
     
    • Like Like x 1
    • brian6pac

      brian6pac Well-Known Member

      Messages:
      3,465
      Likes Received:
      1972
      Joined:
      Nov 15, 2016
      Location:
      N.E.Ohio
      Local Time:
      11:08 AM
      That's what I would say, put the strut rods in and see what you got.
       
    • rklein383

      rklein383 Well-Known Member

      Messages:
      1,338
      Likes Received:
      218
      Joined:
      Dec 2, 2005
      Local Time:
      10:08 AM
      It is hard to see if the LCA is bent or the k frame is bent. Can you/do you have a LCA pivot without the LCA attached and see how it points relative to the k frame?
       
    • jos51700

      jos51700 Well-Known Member

      Messages:
      4,514
      Likes Received:
      1244
      Joined:
      May 24, 2009
      Location:
      Bel-Ray
      Local Time:
      10:08 AM
      Put it all together and measure from the spindle nut to axle flange on either side after you get it aligned.

      This will tell you if it's bent, after your alignment guy tells you it's bent.
       
    • GeorgeH

      GeorgeH Well-Known Member

      Messages:
      8,531
      Likes Received:
      3256
      Joined:
      Sep 23, 2014
      Location:
      laurel delaware
      Local Time:
      11:08 AM
      X measure the mounting holes on the K-frame and that will tell you if it's square then measure from the outer lower ball joint hole in the control arm to the forward k-frame mount hole on the same side. Do the same on the other side and compare measurements. The drivers side measurement would be short as the control arm is bent to the forward end of the car.
       
    • GeorgeH

      GeorgeH Well-Known Member

      Messages:
      8,531
      Likes Received:
      3256
      Joined:
      Sep 23, 2014
      Location:
      laurel delaware
      Local Time:
      11:08 AM
      That measurement tells very little and is highly inaccurate. It assumes the rear end is square in the car and if the wheels are turned a couple of degrees or the toe is off the measurements are all over the map.
       
      • Agree Agree x 1
      • hemi71x

        hemi71x FABO Gold Member FABO Gold Member

        Messages:
        4,364
        Likes Received:
        690
        Joined:
        Dec 22, 2009
        Location:
        Rancho Cordova, CA
        Local Time:
        8:08 AM
        Take both of the LCA's out, and lay them side by side.
        Look at them end to end.
        You will easily find out if one of them is bent or not.
        The most noticeable place for them to bend, is by the ball joint socket area, at the end of the arm.

        How's your crossmember, where the shaft of the LCA goes through?
         
      • AJ/FormS

        AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

        Messages:
        15,429
        Likes Received:
        4485
        Joined:
        Jan 19, 2014
        Location:
        South-Central Manitoba,Canada, 900ftelevation
        Local Time:
        10:08 AM
        That thing looks like a cheeze-curl; bent twisted and put thru a wringer. ooolee Hannah
         
        • Like Like x 1
        • 67Dart273

          67Dart273 Well-Known Member

          Messages:
          39,262
          Likes Received:
          6914
          Joined:
          Oct 14, 2010
          Location:
          Idaho
          Local Time:
          8:08 AM
          You might have a hell of a lot of "fun" getting the t bar in that thing...........
           
          • Agree Agree x 3
          • jos51700

            jos51700 Well-Known Member

            Messages:
            4,514
            Likes Received:
            1244
            Joined:
            May 24, 2009
            Location:
            Bel-Ray
            Local Time:
            10:08 AM
            I think you missed the point....being that an alignment is an easy way to know if it's a problem that needs fixing, and there aren't many other ways to concretely measure it out. :D
             
          • GeorgeH

            GeorgeH Well-Known Member

            Messages:
            8,531
            Likes Received:
            3256
            Joined:
            Sep 23, 2014
            Location:
            laurel delaware
            Local Time:
            11:08 AM
            No I didn't miss the point and I'll stand by my statement. My method and a tape measure, since he probably doesn't have a tram gauge, will confirm what he's already thinking. No need to put it all together and pay for an alignment then fix it.
             
            • Agree Agree x 2
            • Jim Lusk

              Jim Lusk Well-Known Member

              Messages:
              3,916
              Likes Received:
              356
              Joined:
              Mar 8, 2006
              Location:
              Fresno, CA
              Local Time:
              8:08 AM
              and then take it apart again...
               
              • Agree Agree x 1
              • charliec

                charliec FABO Gold Member FABO Gold Member

                Messages:
                166
                Likes Received:
                121
                Joined:
                Jun 13, 2017
                Location:
                richmond texas
                Local Time:
                10:08 AM
                Thank you all for your replies. I will follow through with as many checks as I am able to do. I measured the bolt holes in the frame rails where the Kmember bolts in and measured the holes in the Kmember; they line up exactly, so I don't think there is a problem with the K being bent. I think that they will just confirm what I already know...the CA is a POS. I just wish I had noticed that before I put the new bushings in.
                I do have a set of LCA's in the attic, but they are pre-72. Is it possible to remove the sway bar clip from the bad '72 CA and weld it onto the pre-72? Are they configured the same way otherwise?
                 
              • 67Dart273

                67Dart273 Well-Known Member

                Messages:
                39,262
                Likes Received:
                6914
                Joined:
                Oct 14, 2010
                Location:
                Idaho
                Local Time:
                8:08 AM
                YES. Search Jim Lusk, who is above, he has some videos if you are interested in "beefing" the LCA

                Jim Lusk

                 
                • Like Like x 1
                • 72bluNblu

                  72bluNblu FABO Gold Member FABO Gold Member

                  Messages:
                  9,164
                  Likes Received:
                  3173
                  Joined:
                  Nov 28, 2008
                  Location:
                  NorCal
                  Local Time:
                  8:08 AM
                  The control arms are all the same other than the location of the sway bar tab, and moving the sway bar tab is pretty easy.

                  Make sure you check the pivot tube for the LCA, they have a nasty habit of breaking loose inside the K frame and could add to the LCA position not looking right.
                   
                • charliec

                  charliec FABO Gold Member FABO Gold Member

                  Messages:
                  166
                  Likes Received:
                  121
                  Joined:
                  Jun 13, 2017
                  Location:
                  richmond texas
                  Local Time:
                  10:08 AM
                  Hmmmmm. Could you elaborate on the "pivot tube"?
                   
                • 72bluNblu

                  72bluNblu FABO Gold Member FABO Gold Member

                  Messages:
                  9,164
                  Likes Received:
                  3173
                  Joined:
                  Nov 28, 2008
                  Location:
                  NorCal
                  Local Time:
                  8:08 AM
                  The tube in the K-frame that the LCA pivot goes through. Basically where you mount the LCA to the K. All that mount consists of is a tube that is spot welded to the inside of the K frame, and the spot welds can (and do) break, which usually leaves the pivot tube able to flop around on one end.
                   
                • charliec

                  charliec FABO Gold Member FABO Gold Member

                  Messages:
                  166
                  Likes Received:
                  121
                  Joined:
                  Jun 13, 2017
                  Location:
                  richmond texas
                  Local Time:
                  10:08 AM
                  Bingo!! I will check that.
                   
                • charliec

                  charliec FABO Gold Member FABO Gold Member

                  Messages:
                  166
                  Likes Received:
                  121
                  Joined:
                  Jun 13, 2017
                  Location:
                  richmond texas
                  Local Time:
                  10:08 AM
                  Well, if my earlier photos weren't convincing, take a look at these. I put my machinist's rule on the adjuster arm, and look where it's pointing. Big difference between the F*$#$#ed one and the un-F*%$#$#ed one.
                  20180811_144507.jpg 20180811_144541.jpg
                   
                • 72Dart6pack

                  72Dart6pack Harder Better Faster Stronger.

                  Messages:
                  2,873
                  Likes Received:
                  1903
                  Joined:
                  Feb 1, 2016
                  Location:
                  Roseville Michigan
                  Local Time:
                  11:08 AM
                  Here is mine as a reference.

                  20170604_171803.jpg
                   
                • jos51700

                  jos51700 Well-Known Member

                  Messages:
                  4,514
                  Likes Received:
                  1244
                  Joined:
                  May 24, 2009
                  Location:
                  Bel-Ray
                  Local Time:
                  10:08 AM
                  And 75% of the cars on this site have LCA's that are no straighter, and those cars drive and align just fine.
                   
                • AJ/FormS

                  AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

                  Messages:
                  15,429
                  Likes Received:
                  4485
                  Joined:
                  Jan 19, 2014
                  Location:
                  South-Central Manitoba,Canada, 900ftelevation
                  Local Time:
                  10:08 AM
                  75%?
                  I demand a poll,lol
                  cuz I have several straight ones to sell, and if you're right, the value of them just skyrocketed.
                   
                  • Agree Agree x 2
                  • 72bluNblu

                    72bluNblu FABO Gold Member FABO Gold Member

                    Messages:
                    9,164
                    Likes Received:
                    3173
                    Joined:
                    Nov 28, 2008
                    Location:
                    NorCal
                    Local Time:
                    8:08 AM
                    Oh really? Did you take a survey?

                    Let’s face it, you have absolutely no idea how straight 75% of the LCA’s are. Or any idea if the OP’s car will align ok. Because really, with stock parts there’s already barely enough adjustment to put a decent alignment on these cars to begin with. Let alone compensate for a bent LCA. And that’s even before we think about why the arm is bent or if there are other problems with it, they’re assembled arms with rivets, they can wear out.

                    He’s identified a problem, the car is apart, now is by far the best time to deal with it. Unless you really like wasting time and money, because that’s what’ll happen. He’ll reassemble the entire front end, pay for an alignment, get alignment results that are less than great (at best), and then have to pull everything apart again, fix the issue he already knew about, and pay for another alignment.
                     
                    • Agree Agree x 3
                    • Like Like x 1
                    1. This site uses cookies to help personalize 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.