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Talk to me about rear suspension

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    Talk to me about rear suspension

    The rear suspension of my 65 feels very soft and has developed a bit of a creak when compressed slightly, most noticeable when cornering. Ride height still looks ok (both rears sit around the 640mm mark from ground to arch where as the fronts are slightly lower) but I'd like to look at freshening it up a bit as I have no doubt it's sagged over the years. The leafs and shocks have a fair bit of surface rust on them and suspect they are the originals.

    If i were to replace the leafs, what do I need to think about, measure and take into account here? Is it advisable to replace the shackles and bolts at the same time? Also what do I need to look at with shocks? I'd like to try and keep the same ride height that I have right now if possible.

    Thanks in advance :)
    sigpic

    #2
    Mine is quite soft and to be honest I quite like it, I have cut down front springs and new rear leaf with a mid eye so a little lower. Been trying to remember what shock I have but can't for the life of me remember what they are. Creaking noise could be bushes, spray a bit of jollop on each one (one at a time) and find out which one it is. Different car, but still leaf springs, on the old Land Rover I spray/brush some oil on the springs to stop them squeaky, bit messy but does the job. Might not be so acceptable on a classic Mustang maybe.

    1966 Coupe: 1995-
    1966 Land Rover Series 2a: 2012-
    2005 Mustang GT 2014-
    2007 California Special Replica: 2010-2014

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      #3
      rather than replace leaf spring , it may be an option to get them re-tempered. I investigated and price if I remember was around £80 -100 per spring . I think midland motor spring do it same day, but there are others.(if you go down this route I am sure the spring specialist would advise on condition of bushes)
      https://www.midlandmotorsprings.com/specialist-springs

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        #4
        Try lubricating the front and rear leaf spring bushes.

        Iíve used Monroe shocks and pleased with them.
        Gazza

        "Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"

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          #5
          Originally posted by codm80FB View Post
          rather than replace leaf spring , it may be an option to get them re-tempered. I investigated and price if I remember was around £80 -100 per spring . I think midland motor spring do it same day, but there are others.(if you go down this route I am sure the spring specialist would advise on condition of bushes)
          https://www.midlandmotorsprings.com/specialist-springs
          When I had the '67 I took the back springs to Midland Motor Springs, had an extra leaf added and the springs re-tempered. Pleased with the result and the back end didn't sink when somebody sat in the back as it did previously.
          1967 White Convertible Auto ...... 1994 to 2004
          2005 Redfire GT Manual......2008 to 2010
          2010 Kona Blue GT Auto ...... 2010 to 2013


          MOCGB #332 since 1994

          Comment


            #6
            The rear end is a little soft in std form and tends to "sit" badly when you go over things like speed bumps. You can buy new springs but I think the favourite has been mentioned of having them re-tempered. A good shock will improve things no end and yours could be a little tired if they are all rusty. It depends on how much work you want to put in but I have a rear anti roll bar which (although it shouldn't) has stiffened things a bit.
            Allan

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              #7
              Amazing, thank you for the advice here. Midland Motor Springs are local to me which is great, so I'll see what they can do for me in terms of re-tempering.

              Any suggestions on decent shock? Are the Scott Drake ones any good?
              Last edited by cokecan; 26-05-2019, 01:48 AM.
              sigpic

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                #8
                [QUOTE=cokecan;n1232658]Amazing, thank you for the advice here. Midland Motor Springs are local to me which is great, so I'll see what they can do for me in terms of re-tempering.

                Any suggestions on decent shock? QUOTE]

                Koni
                sigpic
                You can never have enough black under the hood.

                Comment


                  #9
                  [QUOTE=cobraboy;n1232660]
                  Originally posted by cokecan View Post
                  Amazing, thank you for the advice here. Midland Motor Springs are local to me which is great, so I'll see what they can do for me in terms of re-tempering.

                  Any suggestions on decent shock? QUOTE]

                  Koni
                  I know of Koni as a brand but shocks aren't something I've ever done much reading into. I see there is STR.T (street) and adjustable versions with quite a price difference! how useful are adjustable shocks on a car that'll likely end up just cruising most of its life? I have ideas/plans for upgrades to it and the engine over the years but not sure what kind of improvement adjustable would give me in that context.
                  sigpic

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                    #10
                    I never knew about the STR versions. I bought a second hand set of re-built adjustable Koni shocks for my 65 and they are very good and give a good ride quality. Generally accepted as the best you can buy. They are not easy to adjust on the car, so like you mention, I looked up on the net and went with some advice on the initial adjustment and haven't changed that. In reality your not going to be continually adjusting shocks on a street car. I think I would go for the Koni STR shocks and try them.
                    Allan

                    Comment


                      #11
                      Koni are a once only buy. If you keep them long enough to have issues then they are rebuildable in the UK.
                      Having the adjustment is great for setting up the car how you like it, you don't have to fiddle every weekend. I have used various other brands on various other cars and have reached the stage where if I am building a keeper then the default shock is Koni.

                      Edit
                      Thinking about it, adjustment on the Mustang is dead easy. On the rear just spin off the bottom nuts, collapse the shock and adjust, The front, undo the top bolts, remove the upper mount, collapse the shock and adjust. OK not as easy as having knobs on the sides, but I would certainly not bother buying a Spax over a Koni because of that. In fact I would not buy a Spax period.
                      Last edited by cobraboy; 28-05-2019, 07:44 AM.
                      sigpic
                      You can never have enough black under the hood.

                      Comment


                        #12
                        Originally posted by cobraboy View Post
                        Koni are a once only buy. If you keep them long enough to have issues then they are rebuildable in the UK.
                        Having the adjustment is great for setting up the car how you like it, you don't have to fiddle every weekend. I have used various other brands on various other cars and have reached the stage where if I am building a keeper then the default shock is Koni.

                        Edit
                        Thinking about it, adjustment on the Mustang is dead easy. On the rear just spin off the bottom nuts, collapse the shock and adjust, The front, undo the top bolts, remove the upper mount, collapse the shock and adjust. OK not as easy as having knobs on the sides, but I would certainly not bother buying a Spax over a Koni because of that. In fact I would not buy a Spax period.
                        Another vote for Koni! thanks for the feedback here, that really helps. Given the last few replies and the bit of research I've been doing I'm pretty much sold on Koni shocks now :) Just need to decide whether to go for street or adjustable. Street would solve the issues right now and no doubt last me many years, but adjustable feel like a better choice to help fit in with whatever I do to the car over the coming years as the car very much is a keeper
                        sigpic

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