Suspension clunking (i think)
 

Been having a weird issue with the car. I think its suspention related

From a stand still if i rev to about 3.5-4k and let the clutch slip i can hear knocking in the rear (barely any if any wheel spin). It certainly does not feel like tire hop but maybe it is? The sound goes away once the car is going over 25km/h. I can re perform the sound everytime from a stop

Not sure if anyones had any similar issues. Thinking it could be axles maybe

Im on cheap coilovers (bc racing), 265 tires with supercharger if that helps

If you were making a turn, I would suspect a rear axle.

But, going straight ahead, I would suspect a drive shaft universal or a bad acting differential.

You may wish to check that your coil overs are bolted down tight.


humfrz

I think OP is saying he's practically launching it. "Barely any wheelspin." It also sounds like he's describing a cyclic/repeating sound until he gets up to a certain speed.

I think OP has a failed CV joint.

I had similar issues and I could feel the clunk too. After investigating; the damn seats were lose from the latch. LOL I know, the obvious right

You say "on cheap coilovers" but not if you have done the other supporting mods. LCAs or anything else?

:slap: .......that's for not being able to tell the difference ...... :D


humfrz

Shut up old man! At least I could hear it!:party0030:

Does it happen on hard braking too? And do you have aftermarket LCAs? Could be them.

WHAT DID YOU SAY ....... ???????



humfrz

yeah this. if i set off normally, i cant hear it. il try and film it and see if i can get it on tape. only happens on low speeds

only other mod back there is SPC control arms at about 2.3 degrees camber

i cant see it being the coils since its only at low speeds. maybe contributing to the cause?

il check under braking and yes SPC lower arms

I forgot to ask how much drop. Anything over about an 1 1/2 has been known to cause axle issues.

It could also be as simple as needing to tighten the retaining nuts though. I would start with that since you certainly fit the description.

Axle issues - http://www.ft86club.com/forums/showthread.php?t=49511

Nut tightening - http://www.ft86club.com/forums/showthread.php?t=92971

ok this is certainly the issue. exact description in the second link. lowered + sticky tires + 300whp will do it.

Thank you!

Excellent it is likely the easier fix of the two. Let us know if that fixes it so we can pass it on to the next guy.

Now I can go troll a few posts in good conscience.

http://personaltao.com/wp-content/up...10/yinyang.gif

Before you blow money on axles I'd spend five minutes disconnecting the rear sway bar (just remove one endlink) and going for a test drive.

I was going crazy searching for a clunk as well, thought it was my custom spring perches but it turns out my LCA's (not SPC) didn't play well with my stock rear bar and endlinks especially after being lowered, the way everything was toleranced created a clunk.

Might not be the answer but it's a cheap test.

:cheers: