The Grumman LLV, or Long Life Vehicle, was the mail truck built for the United States Postal Service from 1986 to 1994. Its aluminium body sat on a General Motors chassis derived from the Chevrolet S-10, and its right-hand drive, low floor and tight turning circle were all shaped around curbside delivery.
Grumman LLV at a glance
| Maker | Grumman, Allied Division, Clinton Township, Pennsylvania |
|---|---|
| Production | 1986–1994 |
| Chassis | General Motors, based on the 1982 Chevrolet S-10 Blazer |
| Contract | April 1986, $1.1 billion for 99,150 vehicles |
| Drive | right-hand drive |
| Engines | 2.5-litre four-cylinder TBI Iron Duke; later 2.2-litre SPFI LN2 |
| Gearbox | three-speed automatic, low gearing |
| Payload | 1,000 lb (450 kg) |
| Design life | 24 years, extended to 30 years in 2009 |
| Fuel economy | 17 mpg-US combined (EPA); 8.2–10 mpg-US in postal use |
| Fleet in 2024 | about 130,000 in USPS service (141,000 in 2010) |
| Built | more than 100,000 |
Based on one source, the English Wikipedia article on the Grumman LLV.
History of the Grumman LLV
A vehicle designed around the mailbox
The LLV was the first vehicle designed specifically for the United States Postal Service. The USPS wrote a specification and three teams built prototypes that were tested in Laredo, Texas, in 1985: Grumman with General Motors, Poveco (a joint venture of Fruehauf and General Automotive Corporation) and American Motors. Serviceability, handling in confined areas and economical operation were the points that mattered in the competition. Each prototype ran a 24,000-mile (39,000 km) test with constant stops and starts, gravel, cobblestones and potholes, carrying a payload of up to 2,000 lb (910 kg).
From prototype to contract
Grumman had already built a small number of KurbWatts, battery-electric vans with aluminium delivery bodies, tested by the USPS in the early 1980s, and about 500 KubVans on a Volkswagen Pickup diesel chassis. Both influenced the body design offered for the LLV. Grumman won the competition and in April 1986 was awarded a $1.1 billion contract for 99,150 vehicles, with an option for a further 54,000.
Production in Pennsylvania
The vehicles were assembled by Grumman’s Allied Division in Clinton Township, Lycoming County, Pennsylvania. The first was finished in April 1986. At peak the plant completed 95 LLVs a day, roughly one every five minutes. Grumman spent $28 million on the factory, doubling it to 213,000 sq ft (19,800 m²) and raising the workforce from 250 to 600. The USPS bought more than 100,000 of the trucks, the last in 1994.
Outliving its design life
The contract asked for a 24-year service life; in 2009 the USPS extended it to 30 years, and an LLV can run over 200,000 miles on its original engine and transmission. To supplement the fleet the USPS bought 21,000 Ford–Utilimaster FFVs in 2000 and 2001, similar aluminium right-hand-drive trucks on Ford chassis. In 2024 about 130,000 LLVs were still in use, down from 141,000 in 2010, all past their service life and making up 57 per cent of the local delivery fleet. Replacement comes from commercial off-the-shelf trucks and the Oshkosh Next Generation Delivery Vehicle, the first of which entered service in 2024.
Design and features
- Right-hand drive: the driver sits on the curb side, with a metal tray for three trays of letter mail where the passenger seat would be, so mail can go straight from the vehicle into the mailbox.
- Tight turning circle: a short wheelbase and a low-geared three-speed automatic made residential streets and cul-de-sacs easy work.
- Mixed axle tracks: the front wheels come from the two-wheel-drive S-10 Blazer and are set narrower than the rear, which uses the four-wheel-drive axle; the result is a small footprint but low ground clearance and poor behaviour in heavy snow.
- Simple mechanicals: the 2.5-litre Iron Duke four and later the 2.2-litre LN2, with an instrument cluster and front suspension shared with the Chevrolet S-10.
- Cheap to run: 1,000 lb of cargo capacity, twice that of the Jeep DJ-5 it replaced, at an EPA combined figure of 17 mpg-US.
Grumman LLV versions
- USPS LLV (1986–1994): the standard right-hand-drive mail truck, more than 100,000 built.
- Canada Post LLVs: a small number went to postal customers outside the United States.
- Later LN2 cars: the 2.2-litre SPFI engine replaced the 2.5-litre Iron Duke towards the end of production.
- KurbWatt and KubVan: earlier Grumman aluminium delivery vans, electric and Volkswagen-based, that shaped the LLV body.
- Ford–Utilimaster FFV: 21,000 similar trucks bought in 2000–2001 to supplement the fleet.
The LLV came out of the same aluminium step-van tradition as the Grumman Kurbmaster. More vehicles are in the Grumman collection.
Sources
- Grumman LLV, English Wikipedia: design, contract, production, technical description, fleet
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