Vibration from center console at high speed..

[JeffM]

Anyone with the M6 have this prob? Above 85 (on the track ), when I let off the gas, the center console starts vibrating.. If I stay on the gas, it doesn't. If I push the clutch in at those speeds, same thing, or if I throw it in neutral..

Any ideas? Driveshaft outta whack? Not sure why it wouldn't vibrate under load though, and only when coasting..

Also, if I remember correctly, my 94 Formula A4 did the same thing..

Thanks for any help.

[FireFinder20]

It's a slight possibilty that a u-joint is a little worn...do you do a lot of hard launches with the car? How many miles are on it? Also check to see if you're leaking trans fluid at the yoke, could be as simple as a shot seal...

[JeffM]

Originally posted by FireFinder20
It's a slight possibilty that a u-joint is a little worn...do you do a lot of hard launches with the car? How many miles are on it? Also check to see if you're leaking trans fluid at the yoke, could be as simple as a shot seal...

I just got the car about 6,000 miles ago. It has about 85k now. Few hard launches, but nothing obsessive. I'll check on the trans fluid..

thanks

[KnightFire]

Sounds like its time for a new balanced drive shaft. I recommend Denny's or Spohn. I currently have a Spohn.

I had the same problems about 6 yrs ago...Spohn's hand balanced DS with yoke cleared it up for me.

First, make sure your tires are balanced

P.S. I would also check your trans. mount...could be coming apart.

KnightFire

[markd79ta]

I am finding that my problem is a common problem, and it reared its ugly head when I changed to 410s. The output shaft on the tranny has a brass bushing that wears with time. After you get about 80-100 miles it starts to show up. Unfortunately, I didn't know about this before getting the gears done. I noticed a slight vibration at about 100-110mph before the install so I didn't think much of it...some new u-joints and I am good to go? Well, I got the gears, and my car vibrates right below the console at about 75-80mph exactly as you described. Anyhow, you might want to check this out. A couple of people on this board ended up with this problem. I really wished that I waited to install the gears because it was manageable before then Now, I am stuck with a tranny overhaul. Since I need to pull it, I am doing synchros as well

Good Luck!!!