1970 different rear leaf springs

Transmission and Drivetrain

  1. richardgoesfast

    richardgoesfast Active Member

    Messages:
    43
    Likes Received:
    Joined:
    May 5, 2019
    Hey folks,
    A friend told me that the Road Runners have different rear leaf springs (Super Stock I think he said they were called) in order to counteract torque under hard acceleration.
    So I looked under the car today and sure enough, I counted a 7 leaf spring on driver and 5 on the passenger. I counted a couple times so I think this is right. But something tells me they should be reversed in their position. Like the 7 spring should be passenger and the 5 on the driver side.
    Does any of this make any sense. . . ?
     
    Rich B likes this.
  2. Rich B

    Rich B Well-Known Member

    Messages:
    192
    Likes Received:
    Joined:
    Jun 23, 2019
    Location:
    Minot, ME
    Good question, would say maybe driver side under normal hi-stress would be the wheel with the higher gripping torque? Chrysler engineers were ahead of their time back then. Traction bars were awesome, had chrome set on my ‘Lil Red Truck. Definitely period correct but never see any in photos of road runners? https://www.bing.com/images/search?q=traction+bar&qpvt=traction+bar&FORM=IGRE
     
    Last edited: Oct 16, 2019
  3. 69hemibeep

    69hemibeep Sponge Bob Square Wheels

    Messages:
    20,794
    Likes Received:
    Joined:
    Sep 10, 2008
    Location:
    AZ Desert,
    Yep they are reversed, they are XHD or nicknamed Hemi springs
     
    Russ69Runner likes this.
  4. quikbird

    quikbird Well-Known Member

    Messages:
    2,613
    Likes Received:
    Joined:
    Mar 1, 2014
    Location:
    columbus, ohio
    yes, larger spring belongs on passenger side to counteract torque on launch
     
    Russ69Runner likes this.
  5. Big Mo

    Big Mo Well-Known Member

    Messages:
    93
    Likes Received:
    Joined:
    Dec 14, 2013
    Location:
    Pa. USA
    Yes on passenger side. I bought a set and ordered them 1" over center to give the body a little lift. There was air shocks on when I got the car. The top shock mounts were bent slightly. I am not a big fan of air shocks. We also put same springs on my friends 66 Bel. and it sits very nice.
     
  6. Russ69Runner

    Russ69Runner Well-Known Member

    Messages:
    4,333
    Likes Received:
    Joined:
    Aug 4, 2016
    Location:
    Lake Wales Fl.
    Put Six leaf on this runner with 2 inch recurve. Wanted lift with out using air shock. Had them and they busted or would leak down over night then had to air them up to get to work. It might ride a little rough but figure once the weight is added back to the car they will set a little lower.
     
  7. quikbird

    quikbird Well-Known Member

    Messages:
    2,613
    Likes Received:
    Joined:
    Mar 1, 2014
    Location:
    columbus, ohio
    air shocks are not a good idea on roadrunners. the upper support bar the shocks attach to is not strong enough to carry the weight of the car. not a good scene when it breaks
     
    Russ69Runner likes this.
  8. ACME A12

    ACME A12 Plaid Sport Coat Wearing Moderator Staff Member

    Messages:
    13,066
    Likes Received:
    Joined:
    Nov 4, 2008
    Location:
    New Port Richey, FL
    You guys are just trying to hurt Basketcase's feelings with all of this anti-air shock talk... :rofl::rofl::rofl:
     
  9. 69hemibeep

    69hemibeep Sponge Bob Square Wheels

    Messages:
    20,794
    Likes Received:
    Joined:
    Sep 10, 2008
    Location:
    AZ Desert,
    :rofl: I think Dave's computer broke, he's been quiet
     
  10. quikbird

    quikbird Well-Known Member

    Messages:
    2,613
    Likes Received:
    Joined:
    Mar 1, 2014
    Location:
    columbus, ohio
    now that you mention it, we ought to be nervous about that
     
  11. Russ69Runner

    Russ69Runner Well-Known Member

    Messages:
    4,333
    Likes Received:
    Joined:
    Aug 4, 2016
    Location:
    Lake Wales Fl.
    Yes the shock tower is pretty weak. Your rite on spot about it holding the weight of the car. Even the dodge's had the same problem.
     
  12. Roadcuda

    Roadcuda Well-Known Member

    Messages:
    10,366
    Likes Received:
    Joined:
    Sep 10, 2008
    Location:
    Rocky Hill, Ct
    Yeah, that happened to my first Road Runner back in '72. The PO fixed it my bolting the broken shock mount to the trunk floor. It tore it all to hell.
     
    Russ69Runner likes this.
  13. Russ69Runner

    Russ69Runner Well-Known Member

    Messages:
    4,333
    Likes Received:
    Joined:
    Aug 4, 2016
    Location:
    Lake Wales Fl.
    Oh my gosh that is a hard lesion to learn. Even though the runner I got found a crack in the support. Must say it is as thin of a piece of metal ever seen to function for what it was intended to do. But metal dose become brittle after time from being worked and twisted. Something has to give.
     

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.