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Old 02-22-2014, 05:56 AM   #1
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Wider tires and rear bearing wear

Hi all,


I bought a new 2010 GT, way back in 2010, which came with standard 19" wheels and 245/45/19 tires.

I yearned for a better look of my Stang, and have installed American Muscle Bullit wheels, 9" x 18" front, 10" x 18" rear, and mounted tires with dimensions: 255/45/18 front and 285/40/18 rear.

The car looked awesome, but after 45'000 miles, the rear bearings worn out and it had to be replaced

I use the car as a daily commuter, and am not accelerating excessively.

I wonder if:

- is it normal that bearing goes after 45'000 miles, and if it is not

- could it be caused by the wider rear wheels that I mounted?

I am puzzled, and am even considering to switch back to original wheel/tire dimensions.


Cheers
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Old 02-22-2014, 09:39 AM   #2
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I assume you mean the axle bearings, not the diff/ring gear bearings.

There is no question that wider tires/wheels place more levering force on hubs and bearings. This is why jacked-up pickups blow through wheel bearings like they were made of cheese.

It is pretty odd that you are experiencing issues if you drive like you say, Usually, it's the cornering and braking loads that do these things in, more than anything.

If you like how it looks, just a premium-price bearing set from Timken or similar and go forth happy.
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Old 02-22-2014, 09:58 AM   #3
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Quote:
Originally Posted by 5LHO View Post
I assume you mean the axle bearings, not the diff/ring gear bearings.
Actually, I wanted to cut the long story a bit shorter. I first replaced the axle bearings only, but that wasn't the issue. Only when I replaced ALL bearings was the thing fixed.

Quote:
Originally Posted by 5LHO View Post
If you like how it looks, just a premium-price bearing set from Timken or similar and go forth happy.
Thanks for the advice
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Old 02-22-2014, 10:04 AM   #4
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That is weird, did you check those axles are straight? Runout here could cause premature bearing failures. I've never seen it take out and entire set, though, unless it was in extreme racing situations.
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Old 02-22-2014, 10:18 AM   #5
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That is weird, did you check those axles are straight? ...
No
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Old 02-22-2014, 10:25 AM   #6
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low fluid level can cause this issue as well....outer bearing seals or differential cover leaks ......if you had oil on the inner side of your wheels or look at the bottom of your differential under the cover... if your axel is bent your outer seals will start leaking before to long....keep an eye on the inside of your rear tires for a wet look.....oil
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Old 02-22-2014, 11:08 AM   #7
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You can look for runout at the axle ends, wheels on. Just slowly rotate them, watching a fixed point of reference. They will wobble in and out if they are bent.

When out, I check them by rolling them on a saw table or similar guaranteed flat surface raised off the floor a bit.
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