I'm with ya on that, my friend!
Anything with a 105 on board has my deep appreciation and respect. That gun just kind of grows on you, if you know what I mean.
The M551 Sheridan tank was designed in the early 1960's, as a need arose for U.S. forces needing a light tank. Constructed of aluminum armor, it is extremely fast, using a 300 hp Detroit Diesel engine and cross drive transmission. It mounts a steel turret and an aluminum hull. It was air transportable and fully amphibious with the screen around the sides raised. The main gun fired a 152mm standard projectile or a missile. It packed a lot of punch for a small tank.
The vehicle has seen combat use in Vietnam, Panama and Desert Storm, and it is used today for training in the California desert by the Armored Force Opposing Forces training center. Weight is 34,900 lbs. Top speed is 43 mph. It was built by the Allison Division of General Motors.
The -551 was good on paper, but not in the field. Use the gun, break the tank, use the missile and ...oh, that didn't work either.
As far as the gun variant on an aroumred car, I'll withhold final judgement until I see the autoloader actually work in the field, for more than a few days. If South Africa can get a wheeled 155 to work, this thing stands a chance.