Rear end chatter when cold?

[kratty]

Anyone else feel what seems like chatter from the rear when turning out onto the main road very first thing in the morning? I'm assuming it's the stone-cold diff that I'm feeling.

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[SpursFan]

If it's could could be piston slap your hearing or you could have the same issue I have, inbad exhaust valve that rattles when closed. Are you noticing the sounds with the baffles open?

 

[kratty]

No, it's not a sound. It's the feeling/sensation of skipping/chatter when making the turn out onto a main road and beginning to accelerate up to speed. Almost as if the tires are skipping, which I suppose it could be, but it only happens on the very first turn of the morning when the car is completely cold.

 

[Hack]

It's not the rear diff, it's the characteristic of the Super Sport tires that you can feel when they are spinning in colder temps or in the wet. I believe it's the way the grooves are cut in the tires that you can feel it, because I haven't noticed that feeling in other high performance tires I've owned. I think it's nice having a secondary way (other than the yellow dash light) of knowing you are spinning the tires in low traction situations. I put the SS tires on my 2011 GT and I could feel the same thing happening when the rear tires were spinning.

 

[Ven0r]

I notice it with my car. To go up and down the driveway i have to cut it at approximately 60 degrees, and when going down in the morning when it's cold i get a couple of weird sounds from the diff. Doesn't happen when the car warms up. Reminds me of a locked differential when turning my truck on pavement.

 

[Honus]

Any chance you're going uphill or downhill/fresh into the clutch?

I've noticed some chatter-type feeling from the hill-start assist. It's a weird feeling - akin to Ven0r's sensation of "locked diff." It only lasts a second though and may be different than what you describe.

 

[hiccup]

Ah! The ol morning torsen fuss

 

[dwalker]

Yeah it's just how the Torsen diff acts. My performance package GT had that same sensation every time I pulled out of my driveway onto the road.

 

[Hack]

Huh, I guess it must be too subtle for me to notice. I do start my morning on a gravel road, which probably reduces the odds of me noticing a slight vibration.

 

[kratty]

Yeah it's just how the Torsen diff acts. My performance package GT had that same sensation every time I pulled out of my driveway onto the road.

Thanks. This is what I suspected, but just wanted to confirm with you guys.

 

[xt6wagon]

A good LSD hates wheel speed differences regardless from where it comes from. Most fun is the old Tempo/Topaz is a part time AWD system with FWD in 2wd mode. The rear diff has a clutch LSD that is pretty tight, so you can light up the inside tire in FWD leaving parking lots by doing a very tight turn.

 

[montreal ponies]

Still pretty cold this time of the year here, and i do get the same sound coming from the Torsen, but this is nothing compare to the piston slap especially when cold. I hate it, find it very annoying, it's like i've got a loose heat shield or something. :doh:

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