The Joint Light Tactical Vehicle is a U.S. Army, USSOCOM, and U.S. Marine Corps program to replace the current HMMWV with a family of more survivable vehicles and greater payload. In particular, the HMMWV was not designed to be an armored combat and scout vehicle but has been employed as one, whereas the JLTV will be designed from the ground up for this role.
The JLTV program is related to, but not the same as, the FTTS (Future Tactical Truck System) program. Lessons learned from the FTTS have been fed into the JLTV requirements.
There are three primary variants of the JLTV, which are categorized by their payload and general mission, and within that category, further variations may exist for specific purposes. All vehicles share some capabilities, while certain configurations may have additional capabilities. All variants are transportable externally by CH-47 and CH-53 helicopters and internally by C-130 aircraft.
General Purpose Mobility: General Purpose Mobility (JLTV-A-GP) is the only variant in Payload Category A, designed for general purpose utility vehicle for use by the Army and Marine Corps, with a 4 person capacity. Unlike other variants a C-130 is capable of transporting two vehicles at a time.
Infantry Carrier: The Infantry Carrier (JLTV-B-IC) has a 6 person capacity, and is designed to carry a fire-team of Army soldiers or Marines. Each service may get a different vehicle, or they may use the same one.
Reconnaissance, scout: Six seat configuration for use by the US Army.
Reconnaissance, knight: Six seat configuration for use by the US Army.
Command and Control on the Move: Four seat command and control (JLTV-B-C2OTM) configuration for use by the US Army.
Heavy Guns Carrier: Heavy Guns Carrier for use by the US Army and Marine Corps for convoy escort, military police, and patrol with four seats and a gunner position.
Close combat weapons carrier: Four seat close combat weapons carrier for use by the US Army and Marine Corps.
Utility vehicle: Two seat utility vehicle for use by the USMC.
Ambulance: Ambulance configuration for use by the US Army and Marine Corps. 3 seats and 2 litters.
Shelter carrier/utility/prime mover: Two seat shelter carrier/utility/prime mover for use by the US Army and Marine Corps.
Ambulance: Higher capacity ambulance configuration for use by the US Army and Marine Corps. 3 seats and 4 litters.
The trailer: Each JLTV will have a trailer capable of carrying the same payload as its prime mover over the same speeds and mission profile. The trailer will also feature all the same reliability characteristics as its prime mover.
Jam-resistant doors: The vehicle's jam-resistant doors will allow the passengers to easily escape after the vehicle has taken damage.
Automatic fire extinguishing system
Extra spall liner: An extra spall liner will help minimize the perforation effects within a vehicle when the vehicle takes hostile fire.
Armor kits: The JLTV will have two armor kits: the A-kit and a B-kit (which adds additional protection to the A-kit). Although the actual armor levels are a classified annex of the JLTV Purchase Description, an RFI (Request For Information) was released in January 2006 which in the interests of market research into the current state of the art requested the following protection levels:
Tires: The JLTV is planned to be able to run on two flat tires in order to keep going after being attacked by small arms.
Small arms fire induced leaks: The vehicle will be capable of traveling one terrain feature after having endured a single small caliber arms sized perforation to the fuel tank, engine oil reservoir, or coolant system.
Electronic monitoring: The JLTV will be equipped with a diagnostic monitoring system that will electronically alert the operator of equipment failures so that they can be fixed. The electronic monitoring will observe the fuel, air intake, engine, cooling, transmission, energy storage, power generation and vehicle speed as well as other systems.