I have had clunking coming from the rear passenger side of my car for a while now and I am at a loss. I have no idea what is causing it or what to do next.
Purchased car bone stock at 27k miles. No issues
Installed Koni STR.T struts, GT500 strut mounts, and Steeda Ultralites on all 4 corners. No issues
Received and installed Koni STR.T shocks. Clunking ensues
Read that the PHB could cause issues; so I installed a BMR adjustable PHB. Still clunking
Read that the sway bar and endlinks are notorious for causing clunking, so I took off the entire sway bar. Still clunking
Thought maybe it's the springs, so I took out the rear springs and put the stock ones back on. Still clunking
Thought maybe I got bad shocks from Koni, so I put the stock shocks back on. Still clunking
I haven't done anything else to the car except install an axleback and that's not clunking anywhere or hitting the axle, etc.
Did you check to see that the nut on the top of the shock is tightened properly? This is sometimes difficult to tighten especially without an impact wrench.
I believe I did. My impact gun was too big to fit so I had to use a wrench to hold the shock/bolt from spinning while tightening down the nut. Tightened it as much as I could until the shock/bolt had no more give :/
Don't tighten that upper shock nut with an impact gun, even if you could. You can easily destroy the nut or shock doing this. Impacts are great for taking an old shock off you're going to throw away but, not for installs. Use hand tools. It doesn't need that much.
You've gone through lots here but, it sure sounds like a bad shock install or worn shock. any wetness on the shock itself?
You sure it ain't the exhaust pipe hitting the frame or PHB brace? It's possible here when you install axlebacks.
No wetness as far as I can tell and the rebound rates on both the konis and stock ones seem to be okay as well.
I thought it might be the axleback but I don't see anywhere it could be clunking and there was no clunking initially with the stock shocks and ultralites.
It is almost guaranteed that one of your suspension components is not tight enough. Go through every threaded fastener of your rear suspension and check it for proper torque. You will find it. Shocks bolts are the most likely problem area but it could be any component. I had a thump in my rear end and it was the adjustment sleeve of the adjustable panhard bar.
Yeah I mean I'm sure it's something suspension related, just don't know what to check next. I've been down there about a dozen times now just for the clunk. Initial install was with a torque wrench and the subsequent times I've tried torque wrenches and an impact gun (in case my torque wrench was off and I wasn't getting it tight enough).
If the clunking started when you put the shocks on the car, it's 99% probably the shocks.
It takes about 20 minutes to change shocks. You can drive the car without the shocks (I mean...don't drive it far though) to see if the shocks are the source of the noise, or you can put your stockers back on.
If the clunking started when you put the shocks on the car, it's 99% probably the shocks.
It takes about 20 minutes to change shocks. You can drive the car without the shocks (I mean...don't drive it far though) to see if the shocks are the source of the noise, or you can put your stockers back on.
It is almost guaranteed that one of your suspension components is not tight enough. Go through every threaded fastener of your rear suspension and check it for proper torque. You will find it. Shocks bolts are the most likely problem area but it could be any component. I had a thump in my rear end and it was the adjustment sleeve of the adjustable panhard bar.
Is your car a manual or auto? If I read what you posted correctly, you installed the konis and the clunking started. Could be the konis that are causing the noise and issue. Other people I've known that have konis as well report similar issues.
Otherwise if you have a manual, that noise would be normal when you're engaging/disengaging the clutch and shifting gears. Mustangs do make a lot of noise.
When I had a clunk in the past it was due to something not being tight enough. Twice I have had my sway bars work loose causing a clunk/pop sound. Maybe see if a fellow lister here is close and give it a second set of eyes to check everything??...
When I had a clunk in the past it was due to something not being tight enough. Twice I have had my sway bars work loose causing a clunk/pop sound. Maybe see if a fellow lister here is close and give it a second set of eyes to check everything??...
I had exactly the same issue; a clunking I couldn't locate. Was told it was the rear shocks, but it wasn't.
There's a real good chance it's your rear sway-bar bushings, this is a well-known issue. I ordered poly-urethane bushings for the sway-bar and the drop links, and it completely cured my clunking.
I had exactly the same issue with mine ,although I installed strange 10 way single adjustable fronts and rears. After about a week the clunking started on the passenger side rear. I tightened every bolt again on all suspension parts and the axle backs. Turns out I put the shock's on the opposite sides. The problem moved to the other side and confirmed it was a bad shock. Now I am looking for a different brand of 10 way adj. rear shocks. Looking for recommendation????
If the shock started making noise after a week then why not talk to strange engineering and get a new shock?
But if you wan't something else not sure there are other 10 way adjustable but maybe you could get some koni adjustables for the rear as they are on sale right now.
Thanks. I did get a new shock from strange without issue. I am just not happy with the adjustability of them, so wanted to know if there were any others out there that people have been happy with.
Not sure if this is it, but I figured I'd share. I have a 2014 5.0 MT and was chasing a rattle-type clunk on the passenger side since it was brand new. It would only happen on bumpy roads and my initial thoughts were suspension or body panel. I never really tried to diagnose it, then one day when my daughter was in the back seat, I noticed the rattle disappeared while traveling the same stretch of road that would generate the noise. When my daughter got out of the car, I lowered the headrest and banged on the top of the back passenger seat and recreated the noise that I heard. I fixed it by installing a small piece of foam behind the seat to take up slack when the seat is in the upright / locked position. Problem solved.
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