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 Post subject: 1924 gearbox question
PostPosted: Tue Aug 19, 2014 10:21 am 
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Joined: Tue Nov 12, 2013 2:46 pm
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I recently acquired a Doctors Coupe and I am rebuilding the gearbox. Please can anyone recommend what oil to use?

BTW, I have two spare gearboxes, both stripped, if anyone needs parts.

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Mike Wright,

Zionsville, IN


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PostPosted: Tue Aug 19, 2014 1:48 pm 
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Joined: Thu Dec 29, 2011 5:57 am
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600 wt. steam cylinder oil


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PostPosted: Thu Apr 16, 2015 6:11 pm 
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Originally, Dodge recommended that a mixture of 2 parts 600wt steam cylinder oil to one part medium grease be used, creating a semi-fluid grease. This 600wt oil is available from aftermarket suppliers, HOWEVER, after consulting with lubrication engineers, i have found that there is a modern equivalent to the home-made semi-fluid grease. The 600wt oil is, in modern units, an ISO VG 460 oil. After contacting Exxon-Mobil's lubrication consultation service, they do make a semi-fluid grease, NLGI 00 (which is semi-fluid) in an ISO VG 460. It's Mobil SHC 007. It's designed for, among other things, old gearboxes, leaky gearboxes, and steering gears on large trucks. It has an EP additive which is needed in gearboxes.
Can be bought in a 5 gallon pail, otherwise known as a 35lb keg at amazon, or other place you can buy bulk oils. Here's a link that hopefully wont go dead like most forum links. http://www.amazon.com/dp/B00G97ECX4/ref ... T2F5G87711


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PostPosted: Sun Apr 26, 2015 7:27 pm 
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Restoration Supply sells a 1500wt steam oil. I bought some and plan on using it in my 25 tranny and rear.


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PostPosted: Wed May 06, 2015 7:12 pm 
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Thank you all! :)

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Mike Wright,

Zionsville, IN


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