Gearing...

snakebit97

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A question for u guys.

I am swapping out my 3:27 rear end gears for 3:55's, 3:73 or 4:10's.

My question is this...which should I go to?

What will my MPG be with each? I am getting about 18 around town and 20 highway with my current 3:27's.

What will be my top speed with each? Factory calls for 152 MPH with current 3:27's.

Any input will be appreciated. 8)
 

ripper

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4:10's Screw the gas mileage. You will like em. :eek:uttahere:
 

uncltrvlnmatt

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My 1997 Cobra had 3:27's. I was getting about 22-23 mpg as an ave per tank.

I installed 3:73's I now ave 20-21 per tank. I drove the car to Florida from Pennsylvania. I ave 25-26 mpg with the 3:73's Same when I drove it to Ma, and my trip to Ct
 
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snakebit97

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I have already installed underdrive pullies, catback exhaust and a BBK cold air intake. I ran a LT-1 Trans Am and got eaten up after the quarter mile, I thought maybe lower gears would help me stay closer.
 
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snakebit97

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Are these (3:90's) installed in your Stang? If so what are your #'s (gas milage, top speed, etc)?

The 3:27'2 do alright, but are to slow out of the gate for me and way to long in getting into the 125+mph area.

I dont run 125+mph much, but I want to get there quick when I do. :eek:uttahere: O0
 

uncltrvlnmatt

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DFG_Pimpin said:
with a DOHC motor, i wouldn't go any lower than 4.10s.

I am very happy with my 3:73's. If you use your car as much as I use mine, go with 3:73's. If you only use it for a weekend play toy, go with 4:10's.
 

19mustang95

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well i have 3.73s in my GT and i would love to step up to 4.10s. :dunno:
 

68mustang5.0

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snakebit97 said:
Are these (3:90's) installed in your Stang? If so what are your #'s (gas milage, top speed, etc)?

The 3:27'2 do alright, but are to slow out of the gate for me and way to long in getting into the 125+mph area.

I dont run 125+mph much, but I want to get there quick when I do. :eek:uttahere: O0

I dont have those installed in my stang, but im getting them installed in a few weeks...Just that people always look at 3.73 or 4.10, but hardly anyone looks at 3.90's. 3.90's are a pretty good gear from what i hear. Just that they are really hard to find now...idk why though.
 

uncltrvlnmatt

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One thing to think about is that anything higher than 3:73 gears you need to get a speed cal. With 3:73's you can still change the speedo gear and your speedo will be right.
 

Bluextc

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4.10's ftw! I've got 4.10's and they are awesome! :thumb:
 

Bluextc

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Snakebit said:
screw all these gears you guys have mentioned, go 430's 8) 8) 8) 8)
'

I wish I would have gotten 4.30's, but alot of people were saying I'd hate the 4.10's. I didn't listen to them, but was afraid to go further. If I could do it over, I'd have gotten the 4.30's...
 

uncltrvlnmatt

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Snakebit said:
screw all these gears you guys have mentioned, go 430's 8) 8) 8) 8)

Why not just say screw it and go with 4:86's and get it over with.
 
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snakebit97

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my uncle used to have an old International pickup that had like 4:86's or 5:38's. That thing was so slow it would have taken it a week to die a sudden death. 8)
I'm sure those gears would be great in a Mustang for the 1/4 mile though.

My friend has 4:10's in a Camaro and he says they are to low...Beats me what to get. :dunno:
 

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