my2ks2k

if they were that bad, then it's def possible that was your problem. the vibration is typically noticeable under load (accel), but if the contact surface is bad enough, then i guess hard braking might produce enough load to cause vibration
interested to see how it works out, hope you get it cleared up without too much hassle

Billman250

If the pit is bad enough, you can definitely get vibration under deceleration.

Most of the time (since the load is less) it is not a problem.

Replace the one bucket and it will cure it.

Sebring AP1

Will update next week! Thanks guys.

SpitfireS

The pure opposite of accelaration is engine braking - from the CV's point of view.
Using the brakes should have nothing to do with it.
The hardest engine braking is downshifting without rev-matching.
So find a speed in a gear at which you're sure one gear down can handle (if you know what I mean).
Then downshift and "catch it" using the clutch and nothing but the clutch.
If it vibrates doing that its the cups.
IMO.

Sebring AP1

Yes. It's the decel that really pronounces the problem. The cup needs to be changed, thank you!

Sebring AP1

Boot replaced today and problem solved.

For anyone with a similar problem in the future = if the cup is pitted that badly, replace it!

iamxpl

good info here. i think when i come up to this problem i will just replace right away instead of swapping.

Sebring AP1

I recommend this as a fix too but if the problem is minor a swap should be just fine.

I think the idea of swapping the boots was done during a race weekend where someone needed a "quick fix" just to finish the weekend. I'm not convinced it was ever a long-term solution rather than "delaying the inevitable"

tcjensen

Sry to bring this thread up again, but I'm having vibration issues coming from the rear as well. Problem is, I installed a Magnaflow catback exhaust around the same time this started happening ... which is also when I started visiting the track more. So I'm not positive if it's the noise of the exhaust or a possible clearance issue (magnaflow sits close to some stuff and not sure if it's hitting anything under load) .... or if it's the CV boot issue. Is there a way to pinpoint the problem and eliminate the possibility of exhaust noise/vibration outside of putting the stock exhaust back on? Overall, I like the exhaust and would rather not take it off, just to find it's the CV boots, then have to put it back on again

Billman250

CV boots have nothing to do with this, it's the CV drive bucket of the axle that gets pitted.

If you can make it vibrate when accelerating, and turn the vibration off instantly by letting off the gas and decelerating, then it is 100% a pitted CV bucket.