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.

Axle gear ratio # w/o removing the dif cover and looking in glove box?

Discussion in 'The Garage' started by 88K5Jimmy, Feb 7, 2003.

  1. 88K5Jimmy

    88K5Jimmy 1/2 ton status

    Joined:
    Jan 10, 2001
    Posts:
    1,323
    Likes Received:
    0
    Location:
    Tulsa OK
    Are there any numbers stamped on the outside of the axle that you can get and run them someplace to see what gear ratio they have in them?

    Thanks
     
  2. K05Aggie

    K05Aggie 1/2 ton status

    Joined:
    Feb 22, 2002
    Posts:
    136
    Likes Received:
    0
    Location:
    Dallas, Texas
    Re: Axle number identification?

    From the factory there is a metal tag held on by one of the diff cover bolts. The ratio will appear like this: 3 73 for 3.73. There is no decimal. You could also check the RPO's listed in the glovebox. I think they have been posted before.

    Found it.

    GU2 = 2.73
    GU4 = 3.08
    GU6 = 3.42
    GT4 = 3.73
    GT5 or GT8 = 4.10
    G80 = Gov-lock
    These are courtesy of HarryH3 in a previous post.
     
  3. 88K5Jimmy

    88K5Jimmy 1/2 ton status

    Joined:
    Jan 10, 2001
    Posts:
    1,323
    Likes Received:
    0
    Location:
    Tulsa OK
    Re: Axle number identification?

    </font><blockquote><font class="small">In reply to:</font><hr />
    From the factory there is a metal tag held on by one of the diff cover bolts

    [/ QUOTE ]

    My 88 didn't have one of these tags and I can say with 99% certainty the dif covers were never opened before I changed it. Did they only do this on specific years? Also, I'm wondering if there are numbers stamped on the axle tube or housing itself that would identify a gear ratio and a place to run the number to see what they mean?
     
  4. Silver84k5

    Silver84k5 1/2 ton status

    Joined:
    Feb 7, 2002
    Posts:
    3,769
    Likes Received:
    0
    Location:
    Hillsboro Oregon
    Re: Axle number identification?

    Just take the diff cover off........
     
  5. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    jack up the rear and turn the tire one full turn and count how many times the driveline makes a full turn lets say one turn of the tire and drive line turns 3 full turns and then 3/4 more turn=3:73 4 1/4 turns=4:10's 3 1/4 turns=3:08's you get the idea /forums/images/graemlins/smile.gif
     
  6. Silver84k5

    Silver84k5 1/2 ton status

    Joined:
    Feb 7, 2002
    Posts:
    3,769
    Likes Received:
    0
    Location:
    Hillsboro Oregon
    oh yea, didnt think abuot that lol.
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,169
    Likes Received:
    1,372
    Location:
    E-town baby!
    Re: Axle number identification?

    </font><blockquote><font class="small">In reply to:</font><hr />
    I can say with 99% certainty the dif covers were never opened before I changed it.

    [/ QUOTE ]

    So you had the cover off and didn't check the numbers stamped on the edge of the ring gear? The BOM numbers on the axle tube won't tell you much, the ratio could have been changed by a previous owner...

    The most reliable way to find the ratio is to remove the cover and get the numbers off the ring gear itself. It's 10 small bolts and a few minutes of your time to know for sure...

    rene
     
  8. 88K5Jimmy

    88K5Jimmy 1/2 ton status

    Joined:
    Jan 10, 2001
    Posts:
    1,323
    Likes Received:
    0
    Location:
    Tulsa OK
    Re: Axle number identification?

    Should have made myself more clear, my fault. I know what the gear ratio of my K5 is, I was wondering if there was any way to get the gear ratio off of an axle in a junk yard by running numbers on the axle itself and without having to pop the cover(if the axle is still under the truck and not spilling gear oil everywhere).
     

Share This Page