M1008
The M1008 is a 1984 K30 pickup with a J code 6.2L diesel, TH400 3 speed automatic, and a NP208 transfer case.
The M1008 has a Dana 60 front axle open and Corporate 14 bolt rear axle with 4.56 gears, detroit locker.
M1031
The M1031 is a 1984 K30 chassis cab pickup with a J code 6.2L diesel, TH400 3 speed automatic, and an NP205 transfer case. The NP205 transfer case is used because it has provisions for a PTO to be installed on the vehicle to power various auxiliary bodies that might be installed.
The M1031 has a Dana 60 front axle and Corporate 14 bolt rear axle with 4.56 gears, a detroit locker in the rear and a limited slip in the front.
Most M1031s are Contact Maintenance Trucks with an aluminum box containing a PTO driven 10KW generator, air compressor and welder. The generator installation has a governor installed on the engine to maintain 1800 RPM to get 60Hz power regardless of load.
Some M1031s had a bed installed and were redesignated M1028A1s
M1028
The M1028 is a 1984 K30 pickup with a J code 6.2L diesel, TH400 3 speed automatic, and a NP208 transfer case. It is primarily used as a shelter carrier and therefore has heavier rear suspension and mounts for a communications box to be installed in the bed.
The M1028 has a Dana 60 front axle with limited slip and Corporate 14 bolt rear axle with 4.56 gears, detroit locker.
The M1028A1 is a 1984 K30 pickup with a J code 6.2L diesel, TH400 3 speed automatic, and a NP205 transfer case. It is primarily used as a shelter carrier and therefore has heavier rear suspension and mounts for a communications box to be installed in the bed. They typically start life as a M1031 chassis cab and have the bed added.
The M1028A1 has a Dana 60 front axle and Corporate 14 bolt rear axle with 4.56 gears, with a limited slip front and detroit locker in rear.
The M1028A2 is a M1028A1 with the addition of dual rear wheels and rear sway bar, all other specs are the same.
The M1028A3 is a M1028 with the addition of dual rear wheels and rear sway bar, all other specs are the same.
M1010
The M1010 is a 1984 K30 chassis cab with a J code 6.2L diesel, TH400 3 speed automatic, and a NP208 transfer case. It is fitted with an ambulance body and a special 200 amp charging system. The rear of the cab is cut to allow passage between the truck cab and ambulance body. The M1010 is also used as a mobile command post and small shop in some units.
The M1010 has a Dana 60 front axle and Corporate 14 bolt rear axle with 4.56 gears, detroit locker.
The M1010 has a special charging system and air conditioning compressor installed to supply the ambulance body with cold air.
The M1010 charging system uses two Leese Neville 100 amp alternators running to an external voltage regulator (the 'blue box') and is prone to having problems maintaining the 12 volt system's charge. Some units removed the system and replaced it with a standard CUCV charging system, with varying degrees of success.
M1009
The M1009 is a 1984 K5 Blazer with a 1 Ton J code 6.2L instead of the normal C code 6.2L diesel and a TH400 3 speed automatic instead of the TH700R4. These modifications were done at the miiltary's request to make all engine/transmission components the same between the 1008 and 1009 trucks.
The M1009 has Corporate 10 bolt axles front and rear with 3.08 gear ratio and a Gov-Lok in the rear. The front axle is open.