When do the gear ratios in the rear axle determine?

Discussion in 'Technical' started by Positively Ralf, Oct 25, 2009.

  1. Positively Ralf

    Positively Ralf Here and There

    Joined:
    Jun 17, 2008
    Messages:
    585
    Likes Received:
    0
    Trophy Points:
    73
    Location:
    Yonkers, NY
    Vehicle:
    1974 Maverick
    I always see people talking about this when upgrading to better performance engines or just 302s. What do these gears determine when the car is being driven?
     
  2. tim keck

    tim keck truckdrivintrailertrash

    Joined:
    Jul 4, 2004
    Messages:
    1,991
    Likes Received:
    7
    Trophy Points:
    111
    Location:
    sharps chapel,Tn
    Vehicle:
    '72 Comet, '75 Maverick, '85 F150 4x4 ,'93 F150,'75 F100,'77 Jeep Wagoneer,'91 Dodge D250 Cummins,'90 F150 xtra cab 4x4, '93 F150 4x4
    Gears are torque multipliers, lower(numerically higher)gears give you more low end grunt while higher(lower numerically)gears put the torque up a little higher, or longer after you take off. Lower gears are usually used behind smaller engines)to help get things going) while bigger engines do ok with higher gears-because bigger engines usually have more torque.
    Swapping gears in the case of the Mavericks is 99.9% performance related. Going to a 3.55 or 3.80 gear over the stock 2.79/3.00 gear is the best seat of the pants improvement you can make IMO. Only drawback is these gears will raise your cruising rpms up 400-600. Not a big deal if you're a city dweller with occational highway spurts, but kind of a pain if you live where a lot of 65-75 mph driving is required/allowed. An overdrive(AOD or T5)fixes the rpm problem, some fabricating is required to run either in a Mav.
     
  3. rwbrooks50

    rwbrooks50 Member

    Joined:
    Aug 13, 2006
    Messages:
    1,066
    Likes Received:
    33
    Trophy Points:
    158
    Location:
    Forney Texas
    Vehicle:
    71 Maverick & 63 Ranchero
    Good reply Tim. Thanks.
     

Share This Page