HG-42 transmission compatibility

[Revelstoake]

Hey,

I'm wondering if there was ever a 4 speed transmission in the HG series tractors. I have a three speed in my 48' HG-42, and I need a lower gear. If possible, I could sure use some direction here and some numbers even more. What should I look for?

I want to keep the machine original, so I want to keep my three speed in storage, but a four speed would certainly help in the woods.

Thanks,
CL Parr
Washington State

[John Schwiebert]

The HG and OC-3 models were all 3 speed units. Don't forget the HG was designed to farm with to start with. Then as the OC-3 models were being used more for industrial purposes an auxilary  transmission was also offered in conjunction with the regular transmission. Then when the OC-4 was introduced a 4 speed was used. If you are close to a TSC store pick up a copy of the new Oliver Hart/Parr magazine. It has a feature article on the HG  and OC-3 models Also see the aux. transmission section on this form. By  the way Clark made both the 3 and 4 speed transmissions.