96BigWS6

Hey guys

The last 2 months have been crazy. Did a bunch of work to my 96 WS6. This is what I have done.

1) diff rebuilt, new seals and all
2) yoke / u-joint replaced on my steel driveshaft, they said they balanced it
3) 4 new tires, balanced and all
4) new Competition Clutch stage 2 with a resurface flywheel, SPEC TB


I went up to 90mph the other day and heard a loud humming noise, went away when I slowed down. So it happens 90mph and up. Only thing I think it can be is the driveshaft, but does the aluminum driveshafts help eliminate this? I've done a lot of research, I come up with that.

Any advice would help, everything is new, even had the diff rechecked "had a small leak" but the car hasn't been driven much between the rebuild and check up.

Double-aught_Z/28

iTrader: (11)

Was it a rotational noise? as in did it get louder as you sped up?

What size gears did you put in the rear?

96BigWS6

It is very very faint around 85 but as soon as you go past 90, it is a constant loud noise, could be rotational, everything was left to stock specifications.

Double-aught_Z/28

iTrader: (11)

Hmm. I only asked about the gears because big aftermarket ones can be loud at faster speeds.

There's no shaking or vibration, just noise right?

96BigWS6

Yea that would make a difference

There is only noise at the point, I am still in the break in period on my clutch, cant really rip it lol

RevGTO

iTrader: (12)

Yep, steel driveshaft. I had to replace it with aluminum on all both my LT1 A4 cars to get rid of it. My LS1 A4 originally had 2.73s and the steel driveshaft, and I replaced it as soon as I got the car without even checking if it caused it.

96BigWS6

What makes it do that?

wssix99

iTrader: (5)

Noise=vibration. I'd think just the normal road wear on the drive shaft over the years would be enough to throw it just slightly out of balance to where it would make noise at high speeds. I have to expect that it didn't make noise from the factory.

96BigWS6

Stinks because I wanted the aluminum driveshaft and the guy doing the work said no no keep the steel and have it serviced, money out the door for nothing, I should of listened to my gut feeling

wssix99

iTrader: (5)

Can you just have the steel shaft cleaned of rust and re-balanced?

RevGTO

iTrader: (12)

There was a factory bulletin about this back in the day of the LT1 cars. GM recommended replacement with the aluminum shaft. I had GM connections back then and the factory replaced it. If you want a permanent fix, this is the way to go. Aluminum driveshafts aren't hard to come by.

96BigWS6

Im not going to waist my time or any more cash

I cant wait to get my aluminum driveshaft

Thanks for that info, I feel comfortable now investing 125$ for a aluminum driveshaft, they are all over eBay

96BigWS6

Actually Rev, I have a question for you, when the drive shaft is removed, does any transmission fluid leak out?

RevGTO

iTrader: (12)

Yes, a little. If you can swap them out and in quick, it's not enough to worry about. But if the operation will take a little time you can use one of those tranny end caps.

McGinnis

My window seal breaks loose at 120mph and sounds like a loud hissing noise. The first time it happened I thought something broke off the car lol

wssix99

iTrader: (5)

This happens over time as the glass pulls away from the seal. You may want to check to make sure your regulator rivets aren't tearing in to the door and causing your glass to come up short against the seal.

If all is well, you can adjust the glass stops to seat tighter against the seal.

RockinWs6

Keep driving 90 mph and the hum will be your last worry. lol

96BigWS6

Im just going to put it on my friends lift to swap the driveshaft out quickly, I got my aluminum driveshaft today!

lol that hasn't happen to me and hope it doesn't

Good to know

lol come on, you have a performance car, you have to push it once and a while