2011 mustang noise on tight turns

batmantech · June 19, 2013

2011 mustang GT500 svt 5,000 miles good friend of sales dept. Guy has been to multiple dealers and all show him the ssm 12039 12039 2007-2013 Mustang Carbon Fiber Limited Slip Differential Normal Noise

2007-2013 MUSTANG GT500, 2011-13 MUSTANG GT EQUIPPED WITH BREMBO BRAKE PACKAGE, 2010 MUSTANG GT EQUIPPED WITH TRACKPACK, 2008-2009 BULLITT - LIMITED SLIP DIFFERENTIAL NORMAL CHARACTERISTICS. THESE VEHICLES ARE EQUIPPED WITH HEAVY DUTY/RACING TYPE CARBON FIBER CLUTCHES IN THE LIMITED SLIP DIFFERENTIALS. THIS TYPE OF LIMITED SLIP DIFFERENTIAL MAY EXHIBIT A CHATTER OR MOAN/GROAN NOISE WHEN MAKING SHARP LOW SPEED TURNS. THESE NOISES ARE A NORMAL CHARACTERISTIC OF THE HEAVY DUTY/RACING TYPE LIMITED SLIP DIFFERENTIAL. NOTE: DRIVING THE VEHICLE IN A TIGHT FIGURE EIGHT PATTERN 5 TIMES MAY LESSEN THE COMPLAINT FOR A SHORT PERIODOF TIME.

EFFECTIVE DATE: 13-NOVEMBER-2012

Well I get the old there has to be a fix, his buddy had the clutch packs done and the noise was gone...

The part number is still the same no update.

Any one have any thoughts on this? I don't see a way around the ssm.

Aaron · June 19, 2013

If you put the early style clutches in it, not the carbon fiber ones, the noise will likely go away. That's probably what happened with his buddy's car.

The only way you'd be able to replace the clutches is if the car spun only one wheel in snow/ice/mud.

Have you tried adding more friction modifier?

The later model (13-up, if I recall rightly) went to a Torsen style locker in the rear end, I will double check at work tomorrow, this would be a permanent (albeit expensive) repair avenue.

Aaron · June 19, 2013

Lucas makes a good rear axle dope, combined with the Ford Friction Modifier I've had really good luck.

batmantech · June 19, 2013

I was wondering about adding more friction modifier. I have had good luck with that also but I did'nt know if these carbon fiber type would respond the same as say an F-150.

Thanks Aaron!

Aaron · June 20, 2013

I've never actually heard it, but most of the cars I work on have aftermarket exhaust.

The newer cars with the torsen axle have even louder exhaust in the Super Snake package than the older super snakes.

It's borderline TOO loud with headers, high flow cats, and the borla straight through mufflers. They're like a dynomax race bullet, but louder. It's almost obscene.

Pretty chatty at 7000 RPM on the dyno though.

batmantech · June 20, 2013

I think a vacation is in order.

I could shadow you at work and of course preform all test drives. Posted Image

batmantech · June 25, 2013

update.. This thing got diff. clutch packs and a few bottles of modifier.So far its ok

Aaron · June 25, 2013

Sweet deal.

It makes me laugh when people buy a factory hot rod and the performance updates cause NVH, then there's complaints about it. LOL

I still can't get over guys with the 13's that need to upgrade past 662HP... Or the fact that the factory driveline & clutch can hack it at 850 wheel horsepower.