Rear knocking in rough or bumpy areas.

[yankeehtwo]

I recently installed a set of lowering springs in my car, and now when I drive in rough areas or bumpy driveways I hear a knocking noise in the rear. I looked around and I could not see any signs of wear on the struts, control arms, etc...
When i hit large bumps that make the car hop, E.G. dips in the road, It does not do it. I do not have an aftermarket sway bar... what could this be??

 

[AllGOnoSHOW]

It's because you put aftermarket rated springs on oem shocks. You need a aftermarket shock

 

[yankeehtwo]

what would be a recommended brand for shocks? or should I just get coilovers?

 

[LowerMyCG5]

get coiovers. the nocking is the spring moving up and down.

it happens with lowering springs, sleeves and coilovers that have been adjusted by lowering the spring whether its a set of teins or someone who adjusted a coilover like type 1&2s the WRONG way.

 

[DrOwZee]

Double check of the top 2 bolts on the shocks are tighten

 

[kiddcoupe]

In for some answers too. I also been getting this "Thump" sound from the rear passenger side, its annoying and cant figure it out. I got function and form type 2's.

 

[truWarier02]

In for some answers too. I also been getting this "Thump" sound from the rear passenger side, its annoying and cant figure it out. I got function and form type 2's.

Could be something as simple as the single bottom lock-ring not being tightened. Or maybe they're blown?

 

[JniG]

Interesting..I've been hearing the same noise from my FF type 1's and i was thinking of posting here too. But mine are basically brand new. No more than 4k miles on them..I'll try checking those top 2 bolts in the morning.

 

[=KRAZY-K=]

it definitely isn't because of the lower springs on stock shocks, because i'm still fully stock and i get the same knocking sound in the rear of my car. The initial thought by me and my dad (who sees this kind of thing all day being a parts manager at a honda dealership) was that the shocks were just worn out after the 217k miles that they have, but my i got to ride in a 2004 accord coupe with 98k miles and it had the same knocking.

 

[TheMole]

I had a similar knocking sound from the front suspension. New endlinks and bushings got rid of the sound. Might be worth checking out for the rear.