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Wheel hops , vibrates over small bumps in road

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Old 10-31-17, 05:27 PM
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Wheel hops , vibrates over small bumps in road

So the problem is litteraly going over little bumps imperfections on the roads. Cracks ,, tiny potholes and what not . Any speed
slow speed it feels like the wheel haves no dampening . Solid stiff . High speed it justs amplifise.

for the pass 6 months. I have replaced all bushings to superpro and diff busbings. New pillow *****. Oem new inner lower congrol arm bushing. And new Ohlins DFV along with new toe link trailing arms.
im out of ideas. Its driving me crazy like the rear end is about to fall apart. I looked at the sway bar bushings. Its present and looks good. End links look like its solid. No play.

bad bearing? Axle ?
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Old 10-31-17, 08:14 PM
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I even tried adjusting the ***** from factory 10 to 12 14 15 17
and then 4 5 6 7. The more stiff the seting is the more less bumpy it is.but the ride quality is harsh. Super stiff all around
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Old 10-31-17, 08:56 PM
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What are your alignment settings? Have you verified them?
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Old 10-31-17, 09:29 PM
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Originally Posted by LargeOrangeFont View Post
What are your alignment settings? Have you verified them?
could alignment cause that ? Ive done alignmemt before i even touched anything.. changed from 18s to 16 stockers with new tires . Alignment.. same .. gone through entire suspension with new things. Alignment. Same .. both times spec is same as stock requires
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Old 11-01-17, 03:48 PM
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What are you comparing to? How it felt with stock suspension? What did you change right before the problem started or did it happen without any known changes? What are your spring rates?
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Old 11-01-17, 04:25 PM
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You changed your stock suspension to an aftermarket suspension. If you want a nice cushy ride, change it back to stock

I believe people complained at the time that the 93 stock suspension was too stiff
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Old 11-01-17, 08:22 PM
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It was on tokico when i bought the car awhile back

im comparing to FDs with all range of suspension. From stock to equivalent setup.
2 same FD with same set up down to the tires. Down the same road have not the same feel. The rear wheel feel like its only 5lbs and slaping up and down as im going over little bumps/steps

while the other fd just feels like any normal car would . Damping and bouncing .. absorbing the shocks coming from the pavement.

hard to describe with words. Ill try to get videos. Either slow motion or ubdercar footage. Thanks for everyones time !
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Old 11-02-17, 09:20 AM
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Originally Posted by kensin View Post
could alignment cause that ? Ive done alignmemt before i even touched anything.. changed from 18s to 16 stockers with new tires . Alignment.. same .. gone through entire suspension with new things. Alignment. Same .. both times spec is same as stock requires
if you Removed and replaces everything on your suspension you probably need an alignment.

Sounds like something is loose or binding.
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Old 11-02-17, 11:07 AM
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I guess I'm a little confused by your descriptions. You mention it feels super stiff and you can feel every little bump or crack which would lead me to think you are having binding problems. Then you mention it feels like the rear wheels weigh nothing and are slapping up and down which would imply you are getting no damping from your Ohlins. I'm guessing that what LOF mentioned above is probably what's happening but I think if you could clarify a little more whether you feel like the wheels are not moving at all over bumps or whether it feels like they are moving a lot with no resistance.
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Old 11-03-17, 03:33 AM
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Im so sorry if my explanation is a little confusing. Im confused as well. I am well aware what coilovers feel like and know what to expect when riding on stiff suspension but this issue is entirely another beast

i took it to J-auto . A suspension shop im sure most of you guys know of
anyways. We checked. Tighness on the toelink. Trailing arms. All new btw. New pillow ball bushings. Checked that and its still solid like new. Triple checked the preload on the DFV.
shock nut tight. Tower nuts tight. Every rear component is tight aswell. Bushing for sway bar are new. Endlink haves no play.
diff bushings are new and tight aswell.

after he test drove it. He knew what i was describing and could finally understand what im saying. There is issue and its nothing like hes ever seen. And juan at jauto has done many car and set up many different suspensions. His words : feels like the wheel is floating and feels like somthing is loose when at low speed going over bumps. Like the wheels about to fall off . It feels more severe then just a busted pillow ball


next week we are going to replace every part that moves in the rear 1 by 1 till we isolate the problem. And swap out to stock suspension and see if it gose away. If it does. Then im the lucky bastard that got defective new ohlins that needs revalving
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Old 11-03-17, 10:08 AM
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Do FDs have similar sway bar end link binding problems like the FCs have when you lower the car and stiffen every bushing and mount in the rear? Otherwise yeah I would think your Ohlins are suspect at this point... Would be interesting to put them on a shock dyno and see what that shows
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Old 11-03-17, 11:31 AM
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I thought it was my endlinks binding up aswell. We disconnected the sway bar and drove around. Problem still the same

at this point. Im swaping to stock suspension and see if the issue is still there , and than cross test with another set of ohlins and teins ss coilovers
If it is a legitimate valving issue. Apon testing and revalving ill get a before and after dyno sheet for it and show you guys
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Old 11-20-17, 11:30 PM
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does the rear of the car feel like someone is grabbing it and shaking it up and down really fast? that what mine felt like over 100mph in mine with a 11/11 set up. I swapped to a 8/6 set up and it felt great after that. I am now running a 11/8 and it doesn't do that anymore like the 11/11. Perhaps try a softer rear spring just to try it out?

I have ohlins dfv on the rx8 and it feels great with the stock 9/6 set up I have.
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Old 11-27-17, 12:32 AM
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Originally Posted by kensin View Post
So the problem is litteraly going over little bumps imperfections on the roads. Cracks ,, tiny potholes and what not . Any speed
slow speed it feels like the wheel haves no dampening . Solid stiff . High speed it justs amplifise.

for the pass 6 months. I have replaced all bushings to superpro and diff busbings. New pillow *****. Oem new inner lower congrol arm bushing. And new Ohlins DFV along with new toe link trailing arms.
im out of ideas. Its driving me crazy like the rear end is about to fall apart. I looked at the sway bar bushings. Its present and looks good. End links look like its solid. No play.

bad bearing? Axle ?
If you're located in the Bay Area, CA, hit me up and I'll dial you in for suspension. I spend COUNTLESS hours doing this on a wide array of cars and have 3 sponsored cars out at WinterJam in December @ Sonoma Raceway to prove themselves.
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Old 12-01-17, 12:10 AM
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I will take you up on that offer sir. Pm you shortly
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