Finding axel ratio

Discussion in '1967-1972' started by beach9618, Oct 19, 2004.

  1. beach9618

    beach9618 Member

    Joined:
    Sep 14, 2003
    Messages:
    15
    I have a 72 short bed 6 cylinder manual 3 speed that I am converting to a 350/TH350 automatic. My problem is determining the axel ratio that I currently have. I have been told that all I have to do is raise the wheels off the ground and turn the drive shaft x amount of times until the wheel has made one complete revolution. Trouble is that when I do that the drive shaft only has to turn about 1.8 times to get the wheel to make one complete revolution. I'm sure I don't have 1:80 gears so I'm wondering what I am doing wrong.
    Any help would be appreciated.
    Jimx(

    ________
    og kush pictures
    ________
    macintosh games
     
    Last edited: Jan 25, 2011
  2. 72cheyenne

    72cheyenne Guest

    Jim,

    The only way to know for sure what ratio you have is to pull the rear cover. On the ring gear are a series of #'s. You're looking for the ones in the middle of the group, they will be one or two digits then a space and then two more. Examples; 10 41, 11 41, 9 41, 14 43,...etc. To find your ratio divide the first # into the second. 11 and 41 is 3.73, 10 and 41 is 4.10 and so on. Yes, there are #'s stamped on the housing, but you don't know if the gears are original or not. Like I said the only way is to count the teeth yourself and divide the pinion into the ring, or use the #'s on the ring gear.

    Good luck,

    Brant
     
  3. beach9618

    beach9618 Member

    Joined:
    Sep 14, 2003
    Messages:
    15
    I was trying to avoid having to pull the cover but i will probably have to. I did find some numbers on the right axel housing facing towards the front but i can't find my notes right now. I am almost certain the gears are original because the truck only has 43,000 original miles on it. If I told you the numbers would you be able to tell me what they mean?
    Jim

    ________
    Yamaha FZ1
    ________
    buy vaporizers
     
    Last edited: Jan 25, 2011
  4. tech1

    tech1 Member

    Joined:
    Dec 30, 2002
    Messages:
    333
    if you post the numbers i will try to decipher them the best that i can
     
  5. beach9618

    beach9618 Member

    Joined:
    Sep 14, 2003
    Messages:
    15
    Tech 1,
    I will try to get them posted today. Thaks,
    Jim;-) ;-)

    ________
    teen vids
    ________
    drugtest
     
    Last edited: Jan 25, 2011
  6. beach9618

    beach9618 Member

    Joined:
    Sep 14, 2003
    Messages:
    15
    Tech 1,

    This is the code I found on the front side of the right axel housing: NF3896838.

    Hope this helps.
    Thanks,
    Jim

    ________
    marijuana vaporizers
    ________
    Rehab Help
     
    Last edited: Jan 25, 2011
  7. tech1

    tech1 Member

    Joined:
    Dec 30, 2002
    Messages:
    333
    that code did not com back try looking on the bottom sid e of the left or right axel tube to find the numbers. it say that the first three are letters that tell you the ratio and then four numbers to tell the build date and the last letter to tell where it was built.and it looks like it will start with a R
     
  8. beach9618

    beach9618 Member

    Joined:
    Sep 14, 2003
    Messages:
    15
    Tech 1
    I did see a bunch of numbers on the back leftside of the diffirential housing but they just looked like 123
    456
    7890
    But I'll try again.
    Thanks

    Jim

    ________
    iolite vaporizer
    ________
    star craft replays
     
    Last edited: Jan 25, 2011
  9. 72cheyenne

    72cheyenne Guest

    Hello,

    Jim, tech 1 is your man for this one. He has more resourses than I have. After all he's one of my resourses.

    Good luck Jim.

    Brant

    p.s. It might be quicker to pull the cover and do the nasty.
     
  10. beach9618

    beach9618 Member

    Joined:
    Sep 14, 2003
    Messages:
    15
    Last edited: Jan 25, 2011
  11. beach9618

    beach9618 Member

    Joined:
    Sep 14, 2003
    Messages:
    15
    >that code did not com back try looking on the bottom sid e
    >of the left or right axel tube to find the numbers. it say
    >that the first three are letters that tell you the ratio and
    >then four numbers to tell the build date and the last letter
    >to tell where it was built.and it looks like it will start
    >with a R

    I looked everywhere on that axel and here is what I found. On the front side of the differential housing are large letters "GM60". On the upper left back side of the housing I found the letters "CON" and under that 12345
    67890

    Does this help?
    Jim

    ________
    rolling a joint
    ________
    vapir no2 vaporizer
     
    Last edited: Jan 25, 2011
  12. mrlurch13

    mrlurch13 Member

    Joined:
    Jun 1, 2002
    Messages:
    22
    Location:
    Tampa USA
    Charles F Rising JR: is there a tag that is bolted to the rearend cover? if so than this will have the ratio on it as well if not the time to do the nasty and pull the cove. Besides it might be a great time to replace the old gear lube .:)
     
  13. beach9618

    beach9618 Member

    Joined:
    Sep 14, 2003
    Messages:
    15
    I thanks everybody for all the help but I finally decided to pull the cover. Turns out I have 3:73's
    Thanks again,
    Jim:)

    ________
    Honda SCV100
     
    Last edited: Jan 25, 2011
  14. martin 68swb

    martin 68swb Member

    Joined:
    Jan 1, 2006
    Messages:
    2
    numbers on rear end on right side tube

    THA W177 2 please let me know if you come up with anything i list of rear codes but this one is not on there
     
  15. martin 68swb

    martin 68swb Member

    Joined:
    Jan 1, 2006
    Messages:
    2
    http://www.americanclassic.com/paint.htm?p1=axles
    here is site for rear end codes
     

Share This Page