I may have just learned something everyone else already knew but..........
if you have quad shocks out back.............
and you want to replace those shorter horizontal ones......................
when you have your parts person look them up,,, tell them to look under "steering dampener"
and like magic, the correct rear small shocks for quad shock applications appear.
they should now show up with a slightly more sensible description,, like "axle dampener"
With wheels/tires much larger than stock, there's not room for the quads ;)
Replace the factory UCA's and LCA's with quality units and you can toss the quad shocks in the trash regardless of tire size. Band-Aid for very poorly designed rear suspension components.
The quad shocks are great while they work. They dampen the axle "wind up". The idea is to control wheel hop when the rear tires are spinning. The solid rear axle is a fine tool for putting a lot of power down but you don't want it jumping around. The car should retain its composure while laying stripes. IRS is great on the track and at speed, but not so much for spinning donuts in a gravel parking lot and jumping the curb with the tires squealing. Gotta have some heavy ground tackle for that.
If anyone interested,, the pn for an original look is................
GABRIEL 14039
found on Rock Auto and on Amazon
Anybody know how big of a tire we can fit on these cars with quad shocks in place? I don’t have any on the car, but would like to run them.
Depends on wheel offset as well. What wheels are you planning on running?
They are 15x8 5.5” backspace was gonna throw 275/50 on it
I put the quad shocks on the car Friday and it’s way better! If people aren’t running them and have aftermarket control arms and are still getting wheel hop I really recommend trying to just reinstall quad shocks! Gabriel 14039 is what I used. Also take note 15x8 wheels with 5.5” backspacing probably won’t fit much more than the 225/60 tires that I currently have on the rear. I will be trying a 15x8 with 4.5” backspacing to try and put either a 255/60 or a 275/60 on the rear while maintaining the quad shocks.
If you can get a 245/60 or bigger on the back with the quads, I'd be good and goded surprised...
I'm running a 245/45/17 on wheels which have 5.75" backspacing. I have about 1.5" between the tire and the quad, and about an inch from the tire to the fender lip.
You run the same size at all four corners? If I go to 17’s that’ll give me more clearance from the quads
Yes I do. They're stock wheels off of a 2000 Mustang GT, but I figured that having the specs for them would help out a bit. I also have the car lowered a decent amount, but that shouldn't bear much change on quad shock clearance.
Have you done control arms yet?
I only have the uppers changed right now. I bought CHE adjustable lowers I’m waiting to buy mustang springs from MM before I install I think I’m going to get sn95 convertible springs?
Personally, I'm using BMR rear springs with MM control arms. I don't think that you should really have to worry about convertible springs unless you're using a stock spring. As long as you use something with a decent spring rate, you should be fine. Springs like the Ford Motorsport springs suck in the rear, even for a Mustang.