We had 5, M816's in our motorpool back in the 80's. All went to Iraq during Desert Storm and all came back. We bent one of the booms on the M816 by lifting a 5,000 gallon water tanker( we used two wreckers to lift the tank, but it had about 2,500 gallons of water still in the tank and one wrecker lifted to fast and shifted the water to one end of the tanker. That wreckers boom bent like a wet noodle ). Replaced the boom when we got back to Florida.
In the late 90's we replaced 4, M816 with 3, 10 ton M984 HEMMTT wreckers and another with a M936A2 5 ton wrecker. In 2003 we took all the wreckers to Iraq again. This time we turned-in the last M816 we had oversea's.
If I had to work a wrecker all the time, I would go with the M816 (they would out-lift the M936 that we had all day long) we never had a problem with the M816's. The M936 would blow HYD hose's, Brakes would lock-up, Tires would go flat all the time. There was always somthing wrong with it.