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|  MIL-T-2452J
3.4.9.1 Rear bogie. The rear bogie on class D and E vehicles shall be of the four-wheel
type, complete with axles, springs, torque rods and all other necessary parts. The bogie shall be
provided with a means permitting differential action between the two axles, and a manually
controlled lockout assuring equal power to each rear axle. The lockout control shall be located
in the cab and shall be equipped with a warning light to indicate when the lockout is engaged.
3.4.9.2 Traction control. An automatic traction control shall be furnished. The traction
control on class D and E trucks shall be either on the forward or on the rear axle of the tandem.
The traction control shall actuate automatically to ensure that power is transmitted to the wheels
having traction when the opposite wheel loses traction. Maximum traction capabilities shall be
maintained at all times under each drive wheel for the life of the vehicle.
3.4.9.3 Two-speed axle. Class A vehicle shall be provided with a two-speed axle having
electric or vacuum shift and ratios which permit proper gear splitting.
*
3.4.10 Wheels, rims, tires and tubes. Unless wide base tires are specified, the vehicle
shall be equipped with single front and single front and dual rear wheels. Rims and tire ratings
shall conform to Tire and Rim Association recommendations for the type and size of tires
furnished. Tire type and size, tire load range (ply rating), and rim sizes shall be the same for all
wheels on the vehicle. After being mounted, each front tire and wheel assembly shall be
balanced within industry limits so as to eliminate wheel tramp or drumming at road speeds up to
50 mph. When specified (see 6.2), the vehicle shall be equipped with wide base type tires and
wheels for the front and rear axles in lieu of conventional front and dual rear wheels and tires.
Wide base wheels shall be interchangeable without the use of an adapter. When specified
(see 6.2), disc type wheels shall be furnished.
3.4.10.1 Tires. Tires shall be tube or tubeless type with highway tread. Tires shall be
steel belted radial, or when specified (see 6.2), bias ply. Tires shall be of rated capacity at least
equal to the load imposed on each tire, measured at each wheel, at the ground, with the vehicle
loaded to specified GVW. Tires shall conform to Tire and Rim Association recommendations,
or to ZZ-T-381 with a size designation system the same as the Tire and Rim Association.
3.4.10.2 Inner tubes. When tube type tires are furnished, inner tubes shall be of the
heavy duty type, and shall be of the proper size for the tires furnished. Tire flaps shall be
provided for tube type tires in accordance with Tire and Rim Association recommendations.
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