Using 2 stage pump as a "2 speed" transmission

[farm boy00]

So I've got a mini articulating loader that was built from an old case trenchor. Completely hydraulic drive. I know it is not plumbed the best either. Has one pump feeding into the 2 spool valve for drive and turn then from the valve return to another 2 spool valve for the loader. It is painfully slow and weak. Had to dig a trench before and use a truck to pull it back every time I went to back out.

I know I need specs of everything and to do q bunch of calculations but was wondering if I can use a 2 stage pump from a log splitter to act as a 2 speed transmission. In the high flow/low pressure stage for cruising around/low work and low flow/high pressure stage for when I push into dirt or dealing with hills that require more power?

My reasoning is that it is not much different then a log splitter when it requires it to hit the 2nd stage for splitting hard logs.

Looking to use something like this
https://m.northerntool.com/shop/tools/product_200321055_200321055

Have no pictures of the loader but will be redoing it soon.

 

[oldnslo]

In concept the hi-lo pump will work but I suspect that the sudden shift in flow/speed will be annoying with no way to feather it.

Also potential of being right on the edge shift down, shift up, shift down, etc.

 

[CADplans]

The difference in flow rate makes the two stage pump concept un-workable,,
The flow rates are typically 2GPM,,, or 13GPM,,, that are the only choices.
it would be like having a 4-speed transmission tractor, and only using first, and fourth gear,,
First is typically to slow, fourth leaves you with not enough power to move the machine unless the machine is pointed down a hill,,,