Grinding after tire replacement

[Technacolour]

Greetings,

A couple of weeks ago I found a leak in my tire and took it to get it replaced. I had both rear tires replaced and the old tires on the back were moved to the front. Everything seemed great until I got on the highway when I heard a grinding sound. I went back to the shop they realigned everything but I had the same issue. The guy at the counter said the newer rear tires would be 5mm higher than the front. I took to a shop I know well and needed new rear hubs and a front hub assembly. Neither of those things made a difference with the grinding. Then I told them the difference in tire height and after measuring found a difference in height of about 7/8 inch / 22.22 mm.

Could this be enough to create the grinding sound? Please note that the grinding doesn't not occur until above 24-28 mpg. Before that is smooth.

And I drove it 3 days (58 miles) and it's been parked since

Cheers

 

[Ronin8002]

If I'm reading your profile correctly, you have 4x4 and/or Advancetrac with RSC? if so, having mismatched size tires between front and rear can fool your 4wd and/or Advancetrac to think that there is wheel slippage occurring and lead to one of those systems trying to engage to "fix" the issue.

If this is correct, then it would seem that the way to fix it is to get the same brand/size/model tires installed on the front wheels.

Greetings,

A couple of weeks ago I found a leak in my tire and took it to get it replaced. I had both rear tires replaced and the old tires on the back were moved to the front. Everything seemed great until I got on the highway when I heard a grinding sound. I went back to the shop they realigned everything but I had the same issue. The guy at the counter said the newer rear tires would be 5mm higher than the front. I took to a shop I know well and needed new rear hubs and a front hub assembly. Neither of those things made a difference with the grinding. Then I told them the difference in tire height and after measuring found a difference in height of about 7/8 inch / 22.22 mm.

Could this be enough to create the grinding sound? Please note that the grinding doesn't not occur until above 24-28 mpg. Before that is smooth.

And I drove it 3 days (58 miles) and it's been parked since

Cheers

 

[swshawaii]

http://www.explorerforum.com/forums/showthread.php?t=375042
http://www.explorerforum.com/forums/showthread.php?t=385636

http://www.revbase.com/BBBMOTOR/TSb/DownloadPdf?id=145996

 

[Technacolour]

You are correct and perhaps I should have added that info.

Car in question is:

2005 Ford Explorer XLT AdvanceTrac RSC