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WC sherman gearing?
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JM View Drop Down
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Joined: 12 Sep 2009
Location: United States
Points: 379 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JM Quote  Post ReplyReply Direct Link To This Post Topic: WC sherman gearing?
    Posted: 11 Dec 2011 at 11:18am
How much underdrive does the sherman step down provide? 20%? Thanks,Jm
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MNLonnie View Drop Down
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Joined: 11 Sep 2009
Location: Baxter MN
Points: 4812 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MNLonnie Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec 2011 at 12:00pm
I believe 20% is right from the ground speeds I've seen in the ads.
Waukesha B, B, IB, G, styled WF, D17, 615 backhoe, M7, 2-Oliver OC3's, 5 Ford Model T's, 3 Model A Fords, 34 Ford coupe, 57 T-Bird
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wjohn View Drop Down
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Joined: 19 Jan 2010
Location: KS
Points: 2393 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wjohn Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec 2011 at 12:25pm
A fellow forum member has some of the brochures on his site:

http://www.brianahart.net/sherman.htm

20% looks right for the step-up but I can't quite make out the speeds for the step-down.


Edited by wjohn - 11 Dec 2011 at 12:31pm
1939 B, 1940 B, 1941 WC, 1951 WD, 1952 CA, 1956 WD-45
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Fields View Drop Down
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Joined: 25 Apr 2011
Location: Reedsburg, Wi
Points: 359 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fields Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec 2011 at 1:18pm
if you look at the antique tractor pull guide , ground speed book. Zack Peterson has tire/rpm/grearing charts for wc/wc-rc-high crop/ and sherman under dive. I think it is closser to a rc or high crop rear end. I'm looking for one for my WC  puller myself.
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JM View Drop Down
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Joined: 12 Sep 2009
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Points: 379 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JM Quote  Post ReplyReply Direct Link To This Post Posted: 11 Dec 2011 at 3:48pm
Thanks guys. I checked out Brians brochure, looks like about 30%. JM
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