I’m getting exactly the same, clunking and knocking noises going over bumps, driveways
I had moderate springs installed about a month ago.
Took it back to them last week, they wrapped the rear springs, but noise is still there, when going over bumps. So, they said they need to REPLACE the rear springs. But they only had Super Performance springs & MILD in stock, so They pushed me towards SP and I agreed to SP since it would be the same drop...so, SP springs were put on the rear and they kept moderate springs in front. Not my ideal choice but ... I wanted the noise gone.
After the replacement, I immediately noticed the rear super performance springs are 1-2 inches higher than moderate springs were they took off — but according to them, the SP is supposed to have same drop as Moderates. They had no explanation for me about this.
I have a feeling they put Milds in back by mistake?
Now, the rear springs don’t make any more clunking noise, but I hear noises coming from the front springs, albeit, not as loud as before with the rear moderates
At this point, I like the ride comfort and I’ve grown to be ok with the rear of car being slightly higher than front... so, I have decided to just leave it be
However, I still get that clunking noise from the fronts & I have a feeling I’ll be taking the car back to UP again ..