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In this Discussion
- 46HudsonPU March 2012
- Geoff C., N.Z. March 2012
- hudsontech January 2012
- Jon B March 2012
- RL Chilton March 2012
- Uncle Josh March 2012
1938 Hudson 112
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Can someone tell me what the drive gear is in the rear end of my 1938 112? Thanks for the help.
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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 -
Jack up one rear wheel and mark. Rotate 2 complete turns and count the revs of the drive shaft. Probably 4.56
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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.
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Yup, unless you've got something 'special' (always a good idea to check, as described by Uncle Josh), the commercial series will be that 4-5/9. If you're going to spend much time on the road, you'll want to either invest in an OD, or change-out the rearend.RL Chilton wrote: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.
To anyone/everyone: For changing-out the rearend, any thoughts as to a modern unit replacement, and ratio? Most of those 'recommended' from online sources are late 50's thru mid-60s, and are getting more difficult to find...
BTW - I am going to move this out of 'Discussions', as it is directly related to Hudsons... -
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! -
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.If you're stuck in a hole, stop digging.
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Jon-
What issue was that article included? -
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=mtrIf you're stuck in a hole, stop digging.
