Gearing...

Discussion in 'The Garage' started by snakebit97, Jun 8, 2007.

  1. snakebit97

    snakebit97 New Member

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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)
     
  2. ripper

    ripper Well-Known Member

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    4:10's Screw the gas mileage. You will like em. :eek:uttahere:
     
  3. 19mustang95

    19mustang95 Legend

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    what other mods do you have or have planned?
     
  4. uncltrvlnmatt

    uncltrvlnmatt Legend

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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
     
  5. snakebit97

    snakebit97 New Member

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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.
     
  6. 68mustang5.0

    68mustang5.0 Active Member

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    Ever gave 3.90's a look?
     
  7. snakebit97

    snakebit97 New Member

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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
     
  8. 19mustang95

    19mustang95 Legend

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    with a DOHC motor, i wouldn't go any lower than 4.10s.
     
  9. uncltrvlnmatt

    uncltrvlnmatt Legend

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    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.
     
  10. 19mustang95

    19mustang95 Legend

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

    Dalamar Legend Retired Staff SN95 Supporter

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    410's if your staying NA
     
  12. 68mustang5.0

    68mustang5.0 Active Member

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    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.
     
  13. uncltrvlnmatt

    uncltrvlnmatt Legend

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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.
     
  14. Bluextc

    Bluextc Well-Known Member

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    4.10's ftw! I've got 4.10's and they are awesome! :thumb:
     
  15. Lightning Struck

    Lightning Struck Legend

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    screw all these gears you guys have mentioned, go 430's 8) 8) 8) 8)
     
  16. Bluextc

    Bluextc Well-Known Member

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    '

    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...
     
  17. uncltrvlnmatt

    uncltrvlnmatt Legend

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

    Lightning Struck Legend

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    that might be a Little overkill :D :D :D
     
  19. 68mustang5.0

    68mustang5.0 Active Member

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    Screw 4.86, go 5.38 :hammer: 8)
     
  20. snakebit97

    snakebit97 New Member

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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: