Vibration under acceleration

[JGood]

I have a vibration, kind of feels like wheel hop, while accelerating full throttle at the top half of 1st and beggining of 2nd gear. I have a new guibo and CSB. Everything is tight. Good e46 m3 shock mounts. Good bilstein sports/H&R sports. Straight/balanced bottle caps with new Azenis RT615 tires (vibrated with other wheels/tires too).

I'm afraid it the rear subframe bushings, is there any easy way to check these? i really don't want to have to replace them...

My other guess is the driveshaft, I kind of forced it out of the car to replace the CSB without removing the exhaust :loco: :loco: (it's a long story).
Anyway, maybe I bent it?

Thanks,

Justin

[Juanka]

my car was doing the same I change the flex disc and
the driveshaft center bearing and the vibration was over

[DaN]

Have you checked the driveshaft guide bushing? its pressed into the end near the flex disc.

[JGood]

I mentioned in my post the guibo and csb are brand new...

The bushing in the front of the driveshaft is old, but this problem is more of a sudden failure. The driveshaft feels very tight, I can barely move it in any direction. That's why I'm thinking I bent it or the rear subframe bushings commited suicide, or some other problem, like an axle...

[AdamF 88iS]

You may have seized or nearly seized U-joints in the driveshaft too.

[Ryan Stewart]

You may have seized or nearly seized U-joints in the driveshaft too.

Its this, especially with a new CSB.

[JGood]

Thanks, I have a spare DS i'll swap in. Don't worn subframe bushings cause this as well though?

[TUD]

Sounds like my car before I replaced the driveshaft, flex disc, with all new nuts and bolts. Previously, any time I put my foot in it it I would hear the same noise. The U-Joints were shot.

BTW, we were unable to get the exhaust fully removed so we snaked out the old one and snaked in the new one.

[AdamF 88iS]

Bad sub frame bushings make a loud clunk when you transition from on/off power and the cross member moves up and down hitting the body. They don't make it shake.