In Reply to: HUPP TWO SPEED posted by David Miller on September 15, 2019 at 21:46:29:
Hupp combo's there are two versions and either an early or later one.
If your's is just a simple step up, then not much. A Sherman step up brings about $250.
A good working Hupp combo can bring about the same as a Sherman on Ebay.
Hupp combo's have either a 15 or 25 MPH top speed.
I have one combo in her tractor and another in a 5 gallon bucket of oil, somewhere.
Hupp combo's have a ball on the end of the shifter and can be pulled out and then pushed down (I believe) to engage the under drive range.