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14ff ratio?

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by blazerboy72, Jun 21, 2002.

  1. blazerboy72

    blazerboy72 1/2 ton status

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    What is the most common gear ratio in 14ff it is in a 1976 truck if that helps anything <font color="blue"> </font color>
     
  2. ol_grayfeather

    ol_grayfeather Registered Member

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    All the ones I've seen have been 4.10's. Both my '75's have 4.10's They're both K20's also. Hope that helped.

    Dan
     
  3. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    The ratio is stamped on the ring gear....all you have to do is pull the cover and write down all the numbers you see and post them here.....

    Then you will KNOW for sure what the ratio is!

    BTW -&gt; I currently have two 14BFF's one has 4.10, and the other has 3.73

    Military axles (CUCV) most commonly have 4.56s, I think.
     
  4. chulisohombre

    chulisohombre 1/2 ton status

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    the most common ratio i have seen is 4.10.ive checked out 2 or 3 at the junk yard and all three had this ratio.i also had a friend with 14 bolt and 4.10.
     
  5. arq

    arq 1/2 ton status

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    i've also noticed that (2wd)trucks with the I-6 292 engine and sm465 tranny came with 4.56s. not certain if all but the ones that i've found do have the 4.56s
    also 2 out of 3 K20 disels that i've run across came with 3.73s.

    ARQ.
     
  6. NITRO

    NITRO 1/2 ton status

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    i got 4.10's out of a 78 3/4 ton

    NITRO
     
  7. R72K5

    R72K5 Banned

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    i found 4.10 locking in a 76 454 auto 3/4 ton even though stamping on axle tube said 3.73 - it was incorrect/false stamping, also i once had had a stamping code that said 4.10 on an '85 9.5" and I opened it up and it was actually 3.42....
     

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