clunk/thump sounds after spl bushings installed

Zoren 370

Let as know what you find out what's causing this abnormal sounds. Maybe it needs more drive miles to make everything settle in.

I'm considering of changing my transmission mounts but I would use the Z1 polyurethane one.

For one there's are a lot of plastics/ foams, heat shields that vibrate in the trunk after I switched to coilovers, had to use dynamat to cover all my trunk, heat shield, license plate bracket, stuffed the rear bumper foams with rug towels from vibrating, reinforce my exhaust hangers and bushing.

The price we pay for upgrading our suspension system.

But the car handles so good on the twisties.

nismo13807

i will update this page as what i tried or did to fix this problem..
i have a pair of whiteline poly diff bushings at home but then after i purchase all the other spl solid bushing and motor/trans mounts.. i might as well go all out right? haha so i ended up with the spl solid diff bushings ..
dam and thats just from coilovers? i cant wait to put mine on!

yea i no know lol functional parts aint cheap .. u should see the labor on these bushings.. it cost more than the parts itself lol

Zoren 370

I have whitelines sways bars too.. You said it right labor cost is a killer that is why I invested the money instead in buying quality tools little by little and do the job myself or ask fellow members to help for a cost of a pizza and beer!

IMO suspension upgrades and quality tires are worth the investment rather than doing any engine hp gains. Your in the right direction If you do plan to track your Z.

Masterbeatty

WOW you went full retard on sound dentoning. I don't notice it until my wife tells me its annoying. But I would rather maintain the weight of my car and deal with the noise than put all that extra weight in.



For OP I sent you a PM back. From what I can tell its possibly the tranny mounts or sub-frame bushings. But now seeing what you have the only other possibility is the tranny mounts. Other manufactures use a bushing in between the tranny and the drive shaft that when torn makes a clunk sound but ours do not have that. So by process of elimination the only to spots are the motor mounts and tranny and you have the motor mounts too. But before you spend more dough, take it into a speed shop and see if their tech has any recommendations. Because to make that clunk noise it has to be a big heavy component between something malleable and a relatively large change. A smaller component with little play would make a rattle noise, vibration.

__________________
2011 MB 6MT
Masterbeatty journal