Put the '01 to work this week, driver in my '21. Other than the typical pillar blind spots on the Dodge/Ram, he really likes it.
The '01, I don't like it anymore

It is rough, noisy, follows the ruts, bucks on launch and reverse and ya gotta shift it, Lol
Pros, it runs like a sewing machine, on level 3 it pulls with the '21, no problem. Exhaust brake and truck/trailer brakes work flowless. The material is really dry this fall so the weight is down. I have plenty of room for more, but I just stuck with my normal 10 yds, so about 23k.
Picked up two loads right at the livestock yard, the guys dump truck is broke down so he couldn't haul it to the dump site. His son was the operator, he is awesome, quick and precise, without being wild. We both had about 12 yds, but it was horse manure, so light and fluffy. Will haul again today.