3:73 or 4:10 for automatic - Ford Mustang Forum
 
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post #1 of 8 (permalink) Old 07-26-2013 Thread Starter
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3:73 or 4:10 for automatic

I'm thinking of getting a 13 or 14 automatic GT and adding 3:73 or 4:10 rear. Since it's to be a daily driver don't want to be too far out. Any thoughts ?
Thanks.

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post #2 of 8 (permalink) Old 07-26-2013
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I have 4.10s in my 03 V6. Just put them in about 150 miles ago (along with full suspension) the car seems to launch a LOT better and it is able to keep up with stock and lightly modded GTs of the same year. I havnt driven a ton though since I still need to get the car aligned and it seems I started chopping my tires.

I say 4.10s as the auto can take it and they add more GO to the car.


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post #3 of 8 (permalink) Old 07-28-2013
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Quote:
Originally Posted by larietrope View Post
I'm thinking of getting a 13 or 14 automatic GT and adding 3:73 or 4:10 rear. Since it's to be a daily driver don't want to be too far out. Any thoughts ?
Thanks.
4:10s are pretty tight for a V8 street car. My guess is you will be happier with the 3.73s.

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post #4 of 8 (permalink) Old 07-28-2013
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for a 5 speed street car 4.10s are a bit much, but for the auto is responds better with 4.10s then with 3.73s. I just put a few highway miles on the gears and they do not seem to rev too much higher.

Generally, 4.10s are what are recommended for auto while 3.73s are recommended for stick on a street car.

2003 Redfire V6,
Show: Smoked everything, cobra front bumper, gt rear bumper, rear decklid and lower valence blackout with black mustang letters, 5% rear front 15%, black 98 Cobra rims front, 95 Cobra R rear black with chrome lip, black scoops and spoiler and exhaust tips

Go: CAI, True Duals with flowmaster super 44's, Bama Tune, full suspension (lowered, 8.8, 4.10s, UCA, LCA, springs, CC plates)
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post #5 of 8 (permalink) Old 08-13-2013
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Quote:
Originally Posted by larietrope View Post
I'm thinking of getting a 13 or 14 automatic GT and adding 3:73 or 4:10 rear. Since it's to be a daily driver don't want to be too far out. Any thoughts ?
Thanks.
Opt for the 3.73 gear man, I just had mine done and it is great. First gear is very tall in these new Mustang's so 4.10's are too much unless you are doing quite a bit of drag racing. I have driven both and that would be my honest opinion.

Race-Red 2012 GT: Automatic - K&N Drop-In, Resonators Deleted, GT500 Axle-Backs, Ford Racing 3.73 Gears, Tune
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post #6 of 8 (permalink) Old 09-01-2013
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3.73 best of both worlds. 4.10 get you going faster on low end , higher rpm @ highway speeds. Nuff said.

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post #7 of 8 (permalink) Old 09-03-2013
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Tune it first most are having good great results with the stock 3.15s.
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post #8 of 8 (permalink) Old 09-04-2013
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i just put 4.10's in my 93 LX with auto trans and absolutely love them! I dropped 2 tenths at the track goin from 3.73's to 4.10's. Dont fear the gear!!!

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