1970's Michigan loader 8v71detroit diesel

Thinking about a larger payloader than the the Case W-11 I've got, I'd like something in the 5-7 yd range. I've found this machine that is certainly cheap enough, But the seller says it has transmission and brake issues. What would is the transmission like to work on? Are parts available? It looks to me like the machine is struggling in general, I'd guess the small bite is because of the weak transmission, but the hy

Discuss this in the forum topic Need Advice on a Michigan 125B.