Variable Automatic Transmission

Walt,

Where have you looked so far?????

Is it called a Fenner Drive?

Help us here, Walt. Have you Googled the title to your thread? "Variable automatic transmission"?

Continuously variable transmission - Wikipedia, the free encyclopedia

I lied! It is called a transaxle automatic transmission. The plan is in a Jan 1970 Mechanix Illustrated magazine. I did Google, about 6 mo ago and only found lawn tractor type units. Other units I found would be more fitting on a snowmobile... My wife just threw the book at me. The company was listed as Armor Co. Deer Park Ny. The pictures look something like the friction drive on a snowblower, except there is one on each driven shaft. It may now be called Fenner, I will have to look that up.

No, Walt.

I was making light of your rapid fire questions tonight.

Thus, Fenner. (Wind Farm)

There really is a Fenner Drive Co. Fenner Drives

Sorry, just pullin' yer leg.

I have come across a drive similar to CVT called PIV(positively infinitely variable)drive.

Why not just use two snowmobile drives, with the driver pulleys on a common shaft and the driven pulleys on each separate tread?

Just go out and buy the correct hydrostatic drive units you need and be done with it.

By the time you cobble together a variable belt drive system and then find out exactly why they never caught on due to the high costs and rates of wear on all the parts you would need you will be time money and function ahead to have just got a set of hydrostatic drive units designed specifically for such applications.

I used to drive a swather that had some kind of dual variable transmission. It was somehow hooked up to the steering wheel and you controlled the speed by pushing and pulling on the steering wheel. Pulling it all the way back was reverse. If you cranked the wheel hard to one side it would spin in one spot. I would spin a couple of donuts in the barnyard before I took off to the field.