1970 rear sway bar questions? Size and bushings?

Discussion in 'Suspension, Steering, Brake & Wheel Topics' started by gookc, Apr 6, 2010.

  1. gookc

    gookc Veteran Member

    Aug 9, 2002
    Hi everyone!
    I am restoring a my 1970 camaro base model.
    I parted out an original 1970 Z28 years ago that was rotten beyond repair.
    Had a few questions on the 1970 rear sway bar. What size is it? and where can I get the bushings for the ends, as well as the drop link bushings?
    Also, I compared the Z28 rear sway bar with my 1970 Formula 400 rear bar, and the Z28 bar is allot larger diameter than the Formula bar.
  2. Gary S

    Gary S Administrator Lifetime Gold Member

    Apr 14, 1999
    Bismarck, North Dakota
    1970 base model Camaro ordered with F41 would have had a 9/16" rear swaybar. 1970 Z28 Camaro had a 11/16" bar.
    I don't know what size the Formula Firebird had, but it probably varied depending on year. Trans Ams used 5/8", 3/4", or 7/8" depending on year and options.
    Bushing sets are available from places that specialize in suspension parts. Some of them have been listed here in previous discussions on this subject. A search might turn up a source for you.
  3. Dewey70

    Dewey70 Member

    Oct 4, 2008
    Memphis, TN
    I just received a set from P-S-T.com. $42 delivered. Haven't installed yet but appears to correct fit. 11/16, 2 bolt retainer.
  4. 70RS_L48

    70RS_L48 Veteran Member

    Mar 4, 2010
    Seattle Area
    New Info

    As an original owner, you'd be more likely than anyone to get this one right. Just looked at our info page, and it shows 9/16" across the board. I'm guessing that we need to update our info?:


    And to think I've been laboring all these years with the understanding that all the F-41 cars wore the 9/16" rear bar! Doh! :confused:
  5. gookc

    gookc Veteran Member

    Aug 9, 2002
    thanks Dewey70

    ordered mine today! same price but more for shipping since in hawaii
  6. gookc

    gookc Veteran Member

    Aug 9, 2002
    I remeasured the sway bar again, and with a digital micrometer and the bar measured .76. Could the factory 1970 z28 bar be 3/4"? or is it 7/16"?
    Is it safer to order bushings for a 3/4 or 7/16?
    The difference is a 1/16th of an inch.
  7. Gary S

    Gary S Administrator Lifetime Gold Member

    Apr 14, 1999
    Bismarck, North Dakota
    THe 70 Z28 rear bar should be 11/16, which is just 1/16 under the 3/4 bar used on Trans Ams.
    (3/4 is 12/16, so 7/16 would be much smaller)
    If yours measures .76, I'd order the 3/4 bushings. (11/16 would be .6875)It is always possible that this bar got switched sometime in the life of the car. Measuring is more trustworthy than going by what "should" be on a car after 40 years.
  8. SSomerville

    SSomerville Member

    Jun 16, 2016
    Burlington, ON, CAN

    HI, this is a long shot, but did you part the 70 Z28 in Carson City?

    I have a 70 Z28 that I am restoring and trying to find it's history. It appears to have been parted out. Thanks Chris (csomerville49@gmail.com)
  9. restore-z28

    restore-z28 Veteran Member

    Jul 4, 2010
    Vancouver, BC
    Chris, not sure you will get a response from the OP...does not look like he's posted since 2013. Maybe send him a PM and see if you get lucky.
  10. CamarosRus

    CamarosRus Veteran Member

    I have a 11/16" Front Sway Bar and 13/16" Rear that I removed from a wrecked
    70 Z28 25+ years ago......
    Early build Z28 as Rear Leafs have ROUND HOLE (for tabs) metal clamps

    Does anybody agree with my above specs ??
    If NOT what are the 70 Z28 sway bar specs

    This web site has below specs for 70 Z28

    " Front Swaybar 3984557 1.00" dia.

    Rear Swaybar 481471 0.688" dia. = 11/16
    Rear Swaybar 3983085 0.688" dia."

    Why is there NOT a complete list of ALL the 2nd Gen
    F-Body sway bar specs ????
    Last edited: Sep 4, 2017

Share This Page