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WD/WD45 speeds
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mjbower View Drop Down
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Joined: 04 Oct 2009
Location: Michigan
Points: 255 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mjbower Quote  Post ReplyReply Direct Link To This Post Topic: WD/WD45 speeds
    Posted: 02 Oct 2017 at 9:19am
I've been told that there is a wheel speed difference between these two models. Is there? Books I look at show both models to be 2 1/2 mph in 1st gear. I have heard that a 45 diesel is slower in 1st. Can someone clear this up for me? Thinking of building a transfer sled tractor. Thanks for the help.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 20528 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 2017 at 12:23pm
Old WD's had a low gear of 2.5 MPH.  Late WD's and all WD-45's had a low gear of 2.3 MPH.  All WD-45 diesels and all D-17's have a 15% slower ring and pinion gear set making ALL gears a slower ratio, but the engines run more RPM's to get the ground speed back up to where the others are.  I've got all the transmission gear ratio numbers at home, but these are the basic differences.
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mjbower View Drop Down
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Joined: 04 Oct 2009
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Points: 255 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mjbower Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 2017 at 11:40pm
Ok thanks
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DrAllis View Drop Down
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Points: 20528 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2017 at 7:42am
Low gear ratio thru the differential (not the final drives) is 18 to 1 for a D-17 or WD-45 diesel......15.3 to 1 on a WD/WD-45 with curved gearshift..........13.3 to 1 on a straight stick WD.
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