I think what you are referring to is an M-1025/1026 with a armor kit bolted on. Yes we had those too. The kits add a LOT of weight, and it DOES wear down the parts etc... but, they worked. My company lost 0 soldiers in 13 months because of the armor plating.
yeah, I got my facts mixed up, thanks for correcting me.
It is the add-on armor kits for older models that have the suspension problems, etc.
www.InsideDefense.com Vol. 16, No. 35 -- August 30, 2004:
"The additional armor has been problematic for many of the older vehicles, causing suspension and drivetrain wear.
“All humvees are not made to be armored,” said a spokesman for AM General.
To mitigate some of the strain, the Army is adding horsepower and beefing up the suspension of old Humvees through its recapitalization program, said Steve Roberts, assistant product manager for Humvee recapitalization within the programexecutive office for combat support combat service support."
"AM General also is beginning to make two new models that have stronger chassis designed to better withstand the impact of armor..."