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Old 05-25-2014, 09:27 AM   #1
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2001 V6

Difference between 3.73 & 4.10 racing gears? suggested ratio?
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Old 05-25-2014, 10:10 AM   #2
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3.73 is for manual mustangs and 4.10 is for automatic.
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Old 05-25-2014, 07:43 PM   #3
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thank you so much.
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Old 05-25-2014, 11:01 PM   #4
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Quote:
Originally Posted by Sluder4 View Post
3.73 is for manual mustangs and 4.10 is for automatic.

Its not that simple at all. You can put any gears you want on any car. The reason why they say 4.10s are for automatics only is because first gear would be extremely short for a manual and shifting would be bothersome. The steeper the gear ratio the shorter you gears become BUT the bigger increase in movement you get. Stock we have 3.27 gears so 3.73s and 4.10s are a big upgrade to that but 4.10s are a nice upgrade compared to 3.73s. Then you factor in the gas mileage loss on the highway you get with steeper gears. Steeper gears cause your RPMs to rise higher compared to your stock gears for every mph. With our 3.27s in a 4 speed, we cruise at 70mph at 2100RPMs, with 3.73s probably 2400-2500 and 4.10s probably 2700-2800. This all causes gas mileage loss and extra wear on the engine. Its whatever you want in the end. Either way, 3.73s or 4.10s are both a massive upgrade opposed to stock gears, they will really wake up your car
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Old 05-26-2014, 09:59 AM   #5
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My point is proven then.....
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Old 05-26-2014, 06:21 PM   #6
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Quote:
Originally Posted by Sluder4 View Post
3.73 is for manual mustangs and 4.10 is for automatic.
I went 4.10s with my manual. If you're so concerned with highway gas mileage then why upgrade the gears? Or just cruise at a lower speed than 75. OP there's thousands of these threads out there, take some time and research them. At the end of the day it's all about what you want and what you are willing to deal with
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Old 05-26-2014, 06:50 PM   #7
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I put 4.10s in my manual, after driving with them for a while I know 3.73s would have been a waste.
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Old 05-26-2014, 08:28 PM   #8
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Around how much did u guys pay for the gear swap
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Old 05-26-2014, 08:36 PM   #9
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$200 labor on the condition that I helped my friend install it.
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Old 05-26-2014, 08:37 PM   #10
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I've been having my 4.10 sitting in my car too scared to call to see how much it'll cost me haha
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Old 05-26-2014, 08:40 PM   #11
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Expect the $400-$800 range depending on the shop
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