Shudder at car park speed

[Flyingpip]

Evora s 2011 

shudder from the rear wheels at car park speed on lock,straight after a mot 

is there any do’s or don’ts on the brake test rollers to cause this problem?

Edited November 29, 2021 by Flyingpip
More information

[EGTE]

Check wheel bolts?

Go back and speak to them?

[Colin P]

2 hours ago, Flyingpip said:

shudder from the rear wheels at car park speed on lock

 

Are you sure it is the rear wheels? This sounds very much like the effect of the anti ackerman angle which happens on lock (and is normal). It's worse in cold weather if you are new to an Evora, so may not have noticed it so much in warmer weather. 

[Phillv6]

I’d be very surprised if it isn’t what Colin says, as the weather got colder at the weekend mine has started doing it again.

It can be quite alarming admittedly, I recon you’ll be reporting back soon Russ that all is well 😎

[djmoore]

Which tyre brand’s fitted to your car, Pirelli? Think I read somewhere that swapping to Michelin Pilot Sport 4S cures the anti-Ackerman quirk. An expensive fix unless you were planning to replace them anyway so maybe live with it for now? Not a problem as such anyway if it is that, as others have suggested. 

[Colin P]

Mines a 400 so already on MPSS. I wouldn’t say it’s any less than my N/A was. Simple cure. Don’t use full lock. 

[21gg]

Michelin are definitely better, don't completely stop it though.