so vibration is probably from lowering and drive shafts are not that happy, depending on mileage and how lo its gone the shafts can still last a good long time, could try raising bit to loose vibration
and what can I just buy new driveshafts? nothing else helps? I heard about driveshaft spacer !!maybe I need to use it?
I check it all and there is no any problems !! heard that this because of lowering !! i have the same problem wen I was on bcracing!! and then I setup cup suspension with grams springs vibration is gone !!
the Grams don't lower the car as much as you can with BC so thats probably why not getting vibration with Grams, also unless going really lo (top of tyre is inside wheel-arch) then dont need spacer
The spacer is just keep drive shaft from coming out gearbox when suspension is fully compressed the vibration is from angle of drive shaft when car is lowered
First need find out reason for vibration, is it all time or just from slow speed when accelerating plus how bad is it ?
two options, if vibrations not too bad and cars not silly lo then could probably live with it for years I did - or - raise vehicle 15/20mm
Did you loosen the control arm bolts to the chassis on front and rear when you put the lowered car back to the ground after fitting the coilovers? If not, the rubber bushes will warp cause they have another tension condition then before when the car was on stock height. You can move the car over a mounting pit (sorry, I´m German ) and untight all control arm bolts just a bit. Then rock the car up and down to reset it and retorque the bolts. Then the rubbers will be relaxed to the lowered positon (and will last much longer). If you have a service lift, jack the car up, loosen the bolts and put a hydraulik floor jack underneath the wheels. Lift the wheels carefully against the suspension till the body itself starts to lift. Then retorque the particular bolts. Performing the first method would be better, because the anti roll bar is not involved, with the service lifter is it. Shouldn´t make that big difference.
BTW: My 2016 Trophy is fitted with a KW Clubsport, lowered about 30 mm against Trophy Setup. Of course I did the relaxing of the rubber bushes as talked above. No vibrations at all, no noises, even with steel top mounts.
I try to relaxing bushes but I have one more problem!! after fited new KW Clubsport kit periodically hear a knock in front of the right or left knocks harder on the right and at the same time there is a backlash and gives to the steering wheel and at pads I checked everything at suspension all new parts front arms and ball joints and also I have new steering rack what will be the problem?
these are the typical cause of knock sound sometimes over rough ground Lower ball joints Anti twist links Drop links Top mounts
id get the crow-bar out for sure have look at top mounts and lower ball joints, if movement is so extreme you can fell it shouldn't be too hard to find
yes i just want to do it to determine where it comes from Buy it starts after Clubsport install I think it is nut at top mount not tighten fine
Maybe not the case, but when I´d fit the adjustable top mounts, a little clank appears sometimes. I´d check all the components and all was OK. So, I think it must be the uniball joint of the top mounts that usually makes that noise. We have to live with it!
