Posted by jdemaris on June 18, 2014 at 04:35:12 from (70.195.146.62):
In Reply to: Cletrac HG - UPDATE posted by Bryce Frazier on June 17, 2014 at 09:38:38:
HG and OC3 is WAY too fast in 1st gear for most work since it was sold as a row-crop tractor and not a dirt-mover. Oliver sold kits to put an aux trans in made by Trasco in California. Some have made their own like mine. Oliver/Trasco used a modified Ford Model A (2nd A from 1928-31) transmission. Makes a huge difference. Having the aux in low-range 1st makes it run near the same low speed as 1st gear in a John Deere 420 crawler. HG with no aux runs over 2 MPH in 1st. In low-1st it runs .6 MPH. A John Deere 420 runs .87 MPH. An Oliver OC4 with the factory hi-low aux runs .8 MPH. 2nd two photos are of the original Oliver-Trasco aux trans kit with a modified Model A three-speed.
Here's the original ground speeds with and without the aux.
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