July 16, 2015 at 10:18 am #11099
Anyone do a REAR sway bar? I bought an Addco bar and install kit some time ago and am just starting to install. It’s an ADDCO #936. The “Anchor Plate” (ADDCO’s term for the plate the sway bar is bolted to and which in turn bolts to the control arm) doesn’t interface as instructions indicate due to the “bango” shape of the lower control arm/lower trailing arm. Slide it up the arm and the space get’s to narrow for the bar to fit in between the arms and moves the bar up to the nose/U joint yoke of the diff. Looks like I will need to make a custom plate or in someone’s experience is this a problem part?
Thanks for any info or suggestions.July 16, 2015 at 5:45 pm #11102JimNoelParticipant
I have NOT bought or installed a rear sway bar in my cars, however, Ken sent me pics of a kit and installed pics some time ago. I have attached the pics here, may help you?
You must be logged in to access attached files.July 16, 2015 at 9:17 pm #11109
Thanks Jim, That looks like my ADDCO bar and install kit. Was concerned about it hanging out like that. Ken, how it it work out? Also, was the 1″ rear bar too much?July 19, 2015 at 10:21 am #11110
Is it possible to forward my questions to Ken. Not sure if he is on this site.
ThanksJuly 22, 2015 at 7:03 am #11125JimNoelParticipant
I did contact Ken, he will respond to your question soon.July 26, 2015 at 9:26 pm #11130kid442Participant
Sorry for the delay. I have not installed the bar yet. I am still assembling my car again.I have a spare set of rear arms. I want to install the bar and trim the plates and box and weld them on the arms. Looking at the bar it looks like a van front bar adapted to the rear of our cars. Maybe late fall I will have the car done and I can work on the rear.
KenJuly 30, 2015 at 6:06 pm #11136
Thanks for getting back, just saw your response. I have been in contact with ADDCO and they are making a new “anchor plate” (their term) for the bar to a simple modification I gave them-essentially extend the bottom end of the plate by 2″ so it bridges the entire bottom of the arm. Once I get them I may grind or cut them to fit the contour of the arm nicely. Also planning on boxing the arm and either putting spacers in for the vertical bolts which I will locate and drill in the plate myself or welding the plates to the arm.
What do you think about the 1″ bar thickness with a 13/16 front bar??July 31, 2015 at 1:26 am #11137young_oldsParticipant
ive read that you don want a better sway bar in the rear than front, diameter in itself does not make it better. in reading its said to induce over steer, which is when the rear end slides out like your drifting.July 31, 2015 at 9:50 am #11138
That is the concern I have. Although I have no doubt that when pushed these cars understeer as was common in the day and I believe reported in contemporary road tests. The rear bar should help that but I am concerned that a 1″ bar might be too much and make it rear end happy. Good point that it may be bigger but the mounting and character of the 1″ bar doesn’t necessary mean it will be stiffer/better than the front. At this point this is the only bar I’ve found so I’ll give it a try and report my results.
Looks like Ken may be on the road before me so he might have some results to report sooner.December 22, 2015 at 12:16 pm #11411
Finally have the sway bar installed. Addco made a larger anchor plate for me with one side extended out to 7.5 inches to form a trapezoid so I could fully extend across the bottom of the trailing arm. Be easy to make one. I trimmed it to fit. I also asked them to not drill mounting holes for the trailing arm and I used existing holes-a 1/2 inch hole toward the spring and the hole the ebrake bracket mounts to which I drilled out the 3/8″, marked the plate and drilled the mounting holes. The trailing arm is fully boxed and welded with a full plate on the bottom, internal V shaped pieces side to side at the holes providing full vertical support for the mounting bolts as well as a small plate at both ends. Provided ventilation for all cavities. Won’t be on the road until Spring and I find out how the bar works, hope it’s not too much cause there doesn’t appear to be any other options.
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