77 c10 stock rear gear ratio?

Discussion in 'Chevy Truck Forum' started by brantraynor, Jan 27, 2015.

  1. brantraynor

    brantraynor New Member

    Joined:
    Jan 24, 2015
    Messages:
    3
    Likes Received:
    1
    Trophy Points:
    0
    Occupation:
    Technician
    Location:
    Lakewood, Washington
    I do not have access to my truck at the moment and was curious what could my stock rear gear ratio be? I have a 1977 chevy c10 with a 350 and 4 speed manual trans. I cant give any description to bolt pattern, etc otherwise I know I can figure it out. Any info would be appreciated. Thank you.
     
    1 person likes this.
  2. batty1214

    batty1214 Full Member

    Joined:
    Nov 2, 2008
    Messages:
    2,276
    Likes Received:
    510
    Trophy Points:
    113
    Occupation:
    Mine Mechanic(tire guy)
    Location:
    Vernal Utah
    If I had my guesses, it would be either 3.08 or 3.73. not likely but possible a 4.10. not knowing much about the axle is kinda hard to narrow it down
     
    2 people like this.
  3. mowfixer

    mowfixer Full Member

    Joined:
    Jun 20, 2011
    Messages:
    807
    Likes Received:
    1,491
    Trophy Points:
    93
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Sanford, NC
    This is not exact but will give you a ball park figure:

    If your car has a standard differential then leave one wheel on the ground or both off ground if posi.

    Mark the drive shaft and tire .

    Turn the tire 2 full turns and count the number of times the drive shaft turns.

    If it turns 2 3/4 turns then you have a 2.73. If it turns 3 1/4 turns then you have a 3.23. If it turns almost 3 1/2 turns then you have a 3.42

    This is the way us good ol boys did it in the good old days LOL
     
    2 people like this.
  4. chevychase

    chevychase Semi-Admin
    Staff Member

    Joined:
    Oct 15, 2010
    Messages:
    22,489
    Likes Received:
    13,327
    Trophy Points:
    113
    Occupation:
    SELF EMPLOYED
    Location:
    truck forum .org
    Axle ratios available in these trucks range from 2.56:1 to 4.47:1 with nine stops in between...be impossible to say.
    Someone may have it optioned to suit their needs..so look at the rear.or look in glove box when you get to the truck for G-codes.


     
    1 person likes this.
  5. leolkfrm

    leolkfrm Full Member

    Joined:
    Mar 2, 2008
    Messages:
    12,936
    Likes Received:
    8,036
    Trophy Points:
    113
    Location:
    N.Y.
    3.73 with 4 speed and f44 chassis option
     
    2 people like this.

Share This Page