1938 Hudson 112

Unknown
Unknown
edited November -1 in HUDSON
Can someone tell me what the drive gear is in the rear end of my 1938 112? Thanks for the help.

Comments

  • hudsontech
    hudsontech Senior Contributor
    From the 1938 Hudson-Terraplane group parts book, available in the online library - http://hetclub.org/burr/lithomepage.htm - 4-5/9 was standard for all except Models 80-89 commercial; 4-5/9 was optional for all models exc. 80-89 pickup, panel and station wagon.

    Also available were 3-8/9 and 3-5/9 options for $1 extra.

    Hudsonly,
    Alex Burr
    Memphis, TN
  • Uncle Josh
    Uncle Josh Senior Contributor
    Jack up one rear wheel and mark. Rotate 2 complete turns and count the revs of the drive shaft. Probably 4.56
  • RL Chilton
    RL Chilton Administrator, Member
    I'm sure it's the 4-5/9. I've talked to Dr. Doug about the commercials in those years. Terrible ratio for modern-day driving. Those cars were geared so low, that they sometimes will be turning 4000rpm at 50mph. They were made for haulin', not haulin' a**. For the commercials at least, it's probably best to change the gears and/or add an overdrive.
  • Jon B
    Jon B Administrator
    If anyone's interested, I'd be happy to forward the 6-page article from the WTN, written by Bob Elton, entitled "Making the Terraplane a Highway Cruiser". Most of the article deals with fitting a new rear axle from a Brand X, to your late 30's Hudson product. Unfortunately, that is still a 1960's Brand X, which is in itself becoming rare and an "antique!".

    You can of course still shell out $600 for an exact reproduction of the Hudson 3.5 optional rear end gearset....if Pat McDonald has any left!
  • Geoff
    Geoff Senior Contributor
    The standard car rear end gears are a direct interchange into the commercial, and this gives you 4.1 ratio, which is a considerable improvement. There should be plenty of these around. To check the ratio jack one rear wheel up and wind it over twice and count the number of turns of the drive shaft.
  • RL Chilton
    RL Chilton Administrator, Member
    Jon-

    What issue was that article included?
  • Geoff
    Geoff Senior Contributor
    This would fit into your vehicle. It is the standard ratio 4-1/9
    http://www.ebay.com/itm/VINTAGE-1930s-HUDSON-TERRAPLANE-REAR-END-GEARS-DIFFERENTIAL-PUMPKIN-ASSEMBLY-/220930144739?hash=item33707679e3&item=220930144739&pt=Vintage_Car_Truck_Parts_Accessories&vxp=mtr
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