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Old 10-20-2014, 02:26 PM   #1
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2013 GT Gear Bearings

Does anybody have some info about gear bearings? I replaced factory gearing to Ford's Racing 4.10s and my car had 15,000 miles. Due to the fact hey were aftermarket, i replaced my factory bearings as well. 8,000 miles later the whining and grinding commenced so i replaced the bearings with the factory set up. Car now has 35,000 and the whining and grinding started again. Ican understand that i possibly installed them incorrectly the 1st time but a 2nd? very doubtful. i had a 1996, 2004 and 2006 where i changed gearing to 4.10 and never had this issue. Can anybody explain why? im afraid to take it to the track now . i have to replaced them again and its a pain in the ***.
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Old 10-20-2014, 03:27 PM   #2
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I can't help you on the bearing problem but I will say the 4.10's you installed were way overkill on the gearing and a total waste. Just because they were effective in previous year cars doesn't mean they're the answer in these cars.

You should have done your research.
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Old 10-20-2014, 08:48 PM   #3
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2013 GT Gear Bearings

Quote:
Originally Posted by Grabber Blue5.0 View Post
I can't help you on the bearing problem but I will say the 4.10's you installed were way overkill on the gearing and a total waste. Just because they were effective in previous year cars doesn't mean they're the answer in these cars.

You should have done your research.

I was considering 4.10 gears because my tires are 305/35/20 at 28.43 inches tall. This is fuking tall with top speeds of 52-53mph in 1st and 78-79mph in second with my 3.31 gears.

With 4.10 gears and 7500rpm I'd cross the line at 118/119mph which is maximizing the bandwidth power.

But 4.10 would be overkill if I went with like a 285/30/20 tire at 26.73 inches or shorter because I'd have to shift into 5th lol.

So I was advised that 3.73 is better because with best overall cuz with:
305/35/20 - 4th top speed is 130mph
285/30/20 - 4th top speed is 123mph

This is the most versatile gear for street and track and allows me to go smaller on tires without making my car too short on gears.

Grabber what do you think? 3.73 for my setup? I'm thinking I'm sticking with at least 305/35/20 from now on until I widen my rims if I want meatier tires.


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Old 10-20-2014, 08:50 PM   #4
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Quote:
Originally Posted by Grabber Blue5.0 View Post
I can't help you on the bearing problem but I will say the 4.10's you installed were way overkill on the gearing and a total waste. Just because they were effective in previous year cars doesn't mean they're the answer in these cars.

You should have done your research.
All depends on how your car is setup.
I have 4.10's, I'm also manual. ( not sure what the op is )

I have no regrets going with them, but as I said your car has to be setup for them

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Old 10-21-2014, 04:58 AM   #5
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Quote:
Originally Posted by DallasStang77 View Post
I was considering 4.10 gears because my tires are 305/35/20 at 28.43 inches tall. This is fuking tall with top speeds of 52-53mph in 1st and 78-79mph in second with my 3.31 gears.

With 4.10 gears and 7500rpm I'd cross the line at 118/119mph which is maximizing the bandwidth power.

But 4.10 would be overkill if I went with like a 285/30/20 tire at 26.73 inches or shorter because I'd have to shift into 5th lol.

So I was advised that 3.73 is better because with best overall cuz with:
305/35/20 - 4th top speed is 130mph
285/30/20 - 4th top speed is 123mph

This is the most versatile gear for street and track and allows me to go smaller on tires without making my car too short on gears.

Grabber what do you think? 3.73 for my setup? I'm thinking I'm sticking with at least 305/35/20 from now on until I widen my rims if I want meatier tires.
I think 3.73's would still work better for you.
Quote:
Originally Posted by Rapinator126 View Post
All depends on how your car is setup.
I have 4.10's, I'm also manual. ( not sure what the op is )

I have no regrets going with them, but as I said your car has to be setup for them
Your situation is different plus you aren't drag racing. Plus it sounds like the OP just chose 4.10's based on that's what worked on previous years.
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Old 10-23-2014, 10:28 AM   #6
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I have 285/35/20X10.5. Car runs a 12.01 at the track. i shift at 2,500 RPM on daily driving so i do not think it is an overkill. what i do not get is the wearing down of the bearings, all of them. My car meets the track 1 a month and i am 100% they were put on correctly. if any other info or possible thoughts/experiences you guys can share, i would appreciate it. Thinking of downgrading to 3.73 and hoping to solve the issue.
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