Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Rear diffs

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by kustom71, Jun 26, 2004.

  1. kustom71

    kustom71 1/2 ton status

    Joined:
    Mar 14, 2003
    Posts:
    117
    Likes Received:
    0
    Location:
    NJ
    Arent rears from an 86 k5 blazer and a 77 k10 pickup the same(interchangable)Also if the front and rear gear ratio is different will it hurt anything?????? /forums/images/graemlins/crazy.gif
     
  2. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

    Joined:
    Jan 6, 2003
    Posts:
    1,003
    Likes Received:
    1
    Location:
    Algonquin,illinois
    as far as bolt in yes they are the same but the gear ratios beign different can you say brokin thats no good
     
  3. 87BrnRsd

    87BrnRsd 1/2 ton status

    Joined:
    Apr 21, 2003
    Posts:
    2,457
    Likes Received:
    0
    Location:
    Boone, North Carolina
    If the front and rear gear ratios dont match, and you put it in 4wd, it WILL cause something to break!!
    -Harrison
     
  4. Eric M.

    Eric M. 1/2 ton status

    Joined:
    Dec 10, 2001
    Posts:
    2,118
    Likes Received:
    0
    Location:
    Oakland, CA
    I forgot what the "maximum percent difference" you can have between front and rear gears, but if you have something like 4.10 and 4.11, you're OK. I remember the old 70s Ford F250 had 4.10 in the rear and 4.09 in the front. You run into trouble when you start matching 3.73 with 4.10 or 4.10 with 4.56. Also, your front and rear tires have to match in height as well. Not just the height stamped on the sidewall - if you are running different tires front and rear, you need to get the manufacturers spec. sheet on the tires and make sure the actual heights match front to rear.

    Good Luck,

    Eric M.
     

Share This Page