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Ford 25 Tooth Cluster Gear

Discussion in 'The Hokey Ass Message Board' started by Little Wing, Jul 12, 2010.

  1. Little Wing
    Joined: Nov 25, 2005
    Posts: 7,504

    Little Wing
    Member
    from Northeast

    Another odd cluster gear in the batch...25-22-17-14,,and the end is different from the others ..is this for and OD transmission ?
     

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  2. Little Wing
    Joined: Nov 25, 2005
    Posts: 7,504

    Little Wing
    Member
    from Northeast

    for the night people
     
  3. dirty old man
    Joined: Feb 2, 2008
    Posts: 8,912

    dirty old man
    ALLIANCE MEMBER

    Don't know about the last 3 numbers as I never memorized past the big end. But the 25 tooth is the rarest of the rare, that's for a "25 tooth Zephyr" and has the lowest numerical ratios in intermediate gears of any of the FoMoCo '32-'48 trans.
    Haven't messed with one of those trans since around '59-'60 so I don't remember the corresponding tooth counts required on the front main drive gear, the 2nd gear, and the low & reverse slider. But I bet if you check around on Ford Barn or if Flat Ernie or Dick Spadaro see this they can offer more info.
    Dave
     
  4. Little Wing
    Joined: Nov 25, 2005
    Posts: 7,504

    Little Wing
    Member
    from Northeast

    what do the different cuts on the small end mean ?
     

  5. dirty old man
    Joined: Feb 2, 2008
    Posts: 8,912

    dirty old man
    ALLIANCE MEMBER

    Most likely just a different way of cutting oiling grooves on a thrust surface. May even be a different manufacturer made the gears.
    Dave
     
  6. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    The grooves take ears that locate the thrust washer...there are several different washers, plus another odd one from Canada.
     
  7. Fortyfordguy
    Joined: Sep 16, 2002
    Posts: 643

    Fortyfordguy
    Member

    That is NOT the L-Z gear you might have hoped for. This is a Ford C2TZ-7113-B (Warner #AWT-8R). It was used with the C0AR-7119A thrust washer. Applications:
    1955-56 Ford car - 272 V8 w/o OD
    1956-62 Ford F100 truck - 272 & 292 V8 w/o OD
    1957-62 Ford F250 truck - 272 & 292 V8
     
  8. Little Wing
    Joined: Nov 25, 2005
    Posts: 7,504

    Little Wing
    Member
    from Northeast


    what stops it from being used in earlier case? the size is the same
     
  9. dirty old man
    Joined: Feb 2, 2008
    Posts: 8,912

    dirty old man
    ALLIANCE MEMBER

    My apologies, but glad you corrected me! Didn't realize that Ford ever used a 25 tooth in anything oher than the L-Z.;
    Dave
     
  10. Little Wing
    Joined: Nov 25, 2005
    Posts: 7,504

    Little Wing
    Member
    from Northeast

    Only difference I find is the thrust washer,,so I don't see why it could not be used. Bore is still 1.125


    Also the later 55 gears are much longer than the earlier ( early is like 6 3/4 )

    The 24 tooth T - bird gear was used and that is same design


    Also maybe some later boxes could be pirated for a good gear
     
    Last edited: Jul 14, 2010
  11. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    Will try to remember to research tooth counts for the cluster...that should be in the Lincoln H series parts book. Have only Ford here.
     
  12. Fortyfordguy
    Joined: Sep 16, 2002
    Posts: 643

    Fortyfordguy
    Member

    For one thing, the tooth counts on the other gears on the cluster don't match up with the mating gears on the typical 40-48 LZ gears. Second, the actual tooth shape and design on the 51 and later gears is all different than 1950 and back. The bore size is large to accomodate the larger countershaft used in 1955+ along with the needle bearings.
     
  13. Little Wing
    Joined: Nov 25, 2005
    Posts: 7,504

    Little Wing
    Member
    from Northeast


    Yes not a replacement gear,,it is an early aftermarket gear. Which can be used if one is building there own trans. and wish the LZ gearing.
     
  14. Fortyfordguy
    Joined: Sep 16, 2002
    Posts: 643

    Fortyfordguy
    Member

    I think perhaps the problem here is that you can't use any of the 51 and newer gears in the early (1932-48) passenger car transmissions because they were closed drive (torque tube) and the early mainshaft will not accept the 51 and newer slider gear....thus none of the rest of the gearset could be used. 1949 and newer passenger car could possibly be set up with that gear however. So, as always.....it depends........
     
  15. Little Wing
    Joined: Nov 25, 2005
    Posts: 7,504

    Little Wing
    Member
    from Northeast

    yes and its the 17 gear,,,found a chart ( was posted on the HAMB somehwere ) that tells ya what gear is needed.
     
    Last edited: Jul 15, 2010
  16. outagas
    Joined: Sep 28, 2008
    Posts: 19

    outagas
    Member

    The Lincoln Zephyr gear that used a 25 tooth cluster gear had a
    25-22-18-14 gear count front to back. The ratios were 2.120to 1 1st gear,
    1.430 to 1 2nd gear, and 1 to 1 in 3rd gear.

    Good to use if you had a light weight rod or something with some extra HP and torque as it was kinda high geared off the line.

    The other L-Z gear set used a 26-22-18-14 tooth count on the cluster gear.
    the ratios were: 2.330 to 1, 1.577 to 1 and 1 to 1 in high gear.

    To use the L-Z gears you needed the Main Drive gear (input shaft) , the cluster and the 2nd gear as these were unique to the Lincoln gear sets.
     

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