Good Morning Danny,
Hold on just a little before you start any welding on my account. I want to make sure I’m not leading anyone down the wrong path.
I have watched some of your videos but probably not all and I’m not sure I understand your setup.
On the wheel or axle opposite the chunker are you having to lock it still to cause the cunker to operate?
There are many types of differentials and I don’t know what you are using except you said is is a two speed.
Many have the capability to lock the spider gears with just the moving of a lever and some have a limited slip ( farm tractors , log skidders etc)
Just a broad and general statement is if you are having to lock one axle to cause the other to rotate , the speed is doubled but the force is reduced to half.
When I first built my chunker I first tried to use the opposing brake to lock the axle. To work correctly I needed a slower rpm input but twice the torque . That meant a big tractor running at slow rpm.
The chunker is much more efficient working with a very little motor at higher rpm’s letting the flywheel action do the work.