1940 Dodge D17 Luxury Liner Special: 218-Cubic-Inch Six

Dodge sold the D17 Luxury Liner Special for the 1940 model year with a 217.8-cubic-inch L-head six commonly rated at 87 horsepower in United States specification. It shared its basic 119.5-inch-wheelbase platform and flathead-six engineering with the less elaborately trimmed D14 Luxury Liner Deluxe, while the Special added the brightwork, cabin appointments, and broader body selection expected of Dodge's upper series.

Best known for combining Chrysler Corporation's durable flathead-six drivetrain with the integrated-headlamp styling and all-steel construction of Dodge's final full model year before American civilian automobile production was curtailed during World War II, the D17 remains especially relevant to restorers seeking a complete, unmodified prewar Dodge.

The D17 was not a separate high-performance derivative, nor was “Special” merely a modern auction-room description. It was the upper trim series in Dodge's 1940 passenger-car catalog. Its appeal now rests on correct identification, surviving trim, and the condition of body-specific pieces that are far harder to replace than the basic engine and chassis components.

Quick Facts

The following table separates the D17's core factory configuration from details that changed with body style, assembly plant, or export specification.

The distinction between D14 Deluxe and D17 Special matters during restoration. Their major mechanical assemblies are closely related, but exterior moldings, scripts, interior materials, instruments, and body-specific hardware can determine whether a finished car is a convincing D17 or a collection of interchangeable Chrysler Corporation parts.

Why the D17 Matters

The D17 records Dodge's approach to the medium-priced American car immediately before wartime production changed the industry. Rather than rely on a novel engine or an elaborate transmission, Dodge developed the car around hydraulic brakes, independent front suspension, an all-steel passenger body, and a large-displacement six that produced useful torque at modest crankshaft speed.

Its styling also captures a precise transition. The headlamps moved into the front fenders under the standardized sealed-beam system adopted across the United States for 1940, yet the body still retained separate fender forms, running boards, an upright grille, and the tall greenhouse associated with late-1930s cars. A restored D17 therefore looks recognizably modern beside an early Depression-era Dodge without losing the visual structure of a prewar automobile.

For collectors, the strongest argument is not raw rarity alone. The D17 combines a usable mechanical package with fragile trim and upholstery details that make genuine, complete survivors disproportionately valuable as references. A sound but cosmetically tired original can answer questions that a glossy restoration cannot, particularly concerning woodgraining, plated finishes, stitching patterns, fasteners, and engine-bay presentation.

Historical Context and Development

Dodge and the 1940 American Market

Dodge entered the 1940 model year as one of Chrysler Corporation's established volume divisions, positioned above Plymouth in price and equipment but below DeSoto and Chrysler. Its direct competition included six-cylinder models from Buick, Oldsmobile, Pontiac, Hudson, Nash, and Studebaker, as well as better-equipped Chevrolet and Ford products.

American buyers expected a family car to tolerate low-speed driving, indifferent roads, winter starting, and long service with straightforward workshop equipment. Dodge answered with conservative mechanical development rather than a high specific output. The side-valve six, three-speed gearbox, hypoid rear axle, hydraulic drum brakes, and coil-sprung independent front suspension were mature systems by 1940.

Design Direction

The D17's nose is dominated by horizontal grille bars and a central prow, with sealed-beam lamps faired into the crown of each front fender. The hood remains long and high because the straight-six sits longitudinally, while the passenger compartment uses an upright roof and broad glass area rather than the lower, more enveloping envelope body shapes that appeared after the war.

Chrome moldings and scripts helped distinguish the Special from the D14 Deluxe. Inside, a painted and woodgrained metal dashboard, broad bench seats, centrally grouped controls, and a steering-column gear lever reflected contemporary priorities. Surviving interiors require careful study because upholstery, rubber floor material, garnish molding finish, and small control details were frequently replaced during decades of normal use.

Motorsport and Homologation

The D17 was neither a homologation model nor a factory racing special. Dodge engineering emphasized road durability and mass production, and the car has no separate competition version that should be treated as part of the factory D17 catalog. Any surviving car presented with later speed equipment should be evaluated as a period-style modification unless supporting documentation proves when the work was performed.

Engine and Drivetrain

United States D17 specifications center on Dodge's 217.8-cubic-inch L-head inline-six. Its valves sit in the block beside the cylinders, operated by a camshaft through tappets, which keeps the cylinder head mechanically simple but produces a less direct combustion chamber than an overhead-valve design. The engine's long 4.375-inch stroke helps explain its low-speed flexibility and reluctance to reward sustained high engine speed.

A single downdraft carburetor supplies the mixture through a conventional intake manifold, with a mechanical fuel pump drawing from the rear-mounted tank. Battery-and-coil ignition, a distributor, spark plugs accessible along the cylinder head, a gear-driven oil pump, and water-pump cooling made the engine familiar to period mechanics. Carburetor and electrical suppliers could differ, so restorers should confirm a component against the correct parts book and the car's assembly history rather than assume every 1940 unit used an identical vendor casting.

The dry single-plate clutch feeds a three-speed manual transmission controlled from the steering column. Synchromesh assists shifts in the upper ratios, while first gear should be treated as a low-speed starting gear rather than rushed during downshifts. Drive then passes through an open propeller shaft to a hypoid rear axle.

These are the consistently documented United States specifications most useful when checking an engine or planning a rebuild.

Canadian-built and export cars deserve separate scrutiny. Chrysler Corporation's Canadian engine production used different block dimensions and displacement combinations in some applications. An engine that looks broadly correct may therefore not be the unit specified for a United States-built D17, and displacement should not be inferred from appearance alone.

Chassis, Suspension, and Braking

The D17 uses a separate steel frame under an all-steel passenger body, apart from the substantial timber structure intrinsic to station-wagon coachwork. Independent front suspension with coil springs separates it from the beam-axle arrangements still familiar on some older cars, while the rear remains a live axle located by longitudinal semi-elliptic leaf springs.

Manual steering and four-wheel hydraulic drum brakes suit the speeds and tire grip available in 1940, but both systems depend heavily on correct adjustment. Bias-ply tires have a narrow contact patch and compliant carcass, so alignment, tire pressure, steering-box condition, and wheel balance exert a pronounced effect on road behavior.

This table concentrates on chassis details that apply broadly across the D17 line. Body-specific dimensions and weights should be taken from the relevant factory body listing.

The separate frame allows extensive structural repair, but it also conceals deterioration around body mounts and frame junctions. A body can look square while sitting on crushed mounts, patched floors, or a frame damaged by corrosion and earlier collision repair.

Driving Experience and Handling Dynamics

A properly sorted D17 starts with the measured cadence typical of a long-stroke flathead six. The throttle response is immediate enough at low speed, but acceleration builds through torque rather than revs. First gear gets the car moving, second handles much of the useful urban range, and top gear suits the steady cruising speeds for which the chassis was developed.

The column shift should feel deliberate, not obstructive. Excessive lever travel, baulking, or a tendency to leave gear can indicate worn linkage, tired engine and gearbox mounts, incorrect clutch adjustment, or internal gearbox wear. Fast modern shifts only expose the limits of the synchromesh and linkage.

At parking speed the steering is heavy, especially with an undersized steering wheel or incorrect radial tires. It lightens once moving and responds best to smooth inputs. The tall body and narrow tires permit visible roll, but sound dampers, springs, shackles, and anti-friction joints keep the car from floating through repeated undulations.

Brake pedal travel should be predictable and the car should stop in a straight line. A hard pull often points to contaminated linings, unequal adjustment, deteriorated hoses, or wheel-cylinder trouble. Even in excellent condition, the drum brakes and period tire footprint require considerably more anticipation than a modern braking system.

Identification and Originality

Serial, Body, and Engine Numbers

A 1940 Dodge does not have a modern 17-character vehicle identification number. Identification begins with the original serial-number plate, the D17 series designation in factory documentation, the body number or body tag where present, and the engine number stamped into the block. Plate location and number range should be checked against an authentic Dodge service or parts reference for the applicable assembly plant.

The engine number is important, but “matching numbers” must be used cautiously. Prewar Chrysler Corporation practice did not provide the same publicly understood body, chassis, and engine matching system associated with many later collector cars. A period-correct 218 can be entirely suitable while not being the engine installed when new, and restamping or an altered pad should reduce confidence rather than create certainty.

Registration records add another complication. Some jurisdictions historically titled older cars by engine number, while others used the serial number. A replacement engine can therefore leave a perfectly genuine car with paperwork that no longer agrees with the block. Buyers should reconcile the physical plate, engine stamping, title, and historical records before money changes hands.

D17 Special Details

The safest identification method treats the car as a complete assembly. Correct Special scripts, grille and hood trim, side moldings, instrument treatment, upholstery pattern, interior garnish finish, hubcaps, and body hardware should agree with period literature. A loose D17 emblem does not turn a D14 Deluxe body into a Special.

Because Chrysler Corporation shared many service components across Dodge, Plymouth, DeSoto, and Chrysler products, later substitutions are common. Carburetors, distributors, generators, starters, cylinder heads, wheels, gauges, and even complete engines may fit while carrying the wrong part number or date. Fit and function alone do not establish originality.

Paint, Trim, and Documentation

Paint codes and trim selections should be established through a surviving body tag, build documentation where available, original dealer material, and protected samples under moldings or behind interior panels. Modern color names applied by sellers are not substitutes for factory evidence. Woodgraining on the dashboard and garnish moldings also deserves specialist attention, since an attractive hand-applied pattern may bear little resemblance to the original production finish.

Useful documentation includes an original sales invoice, owner's manual, service records, period registration, factory parts book, photographs taken before restoration, and records tracing engine or body replacement. Date-coded and supplier-marked components can support a restoration, but no single casting date proves the identity of the entire car.

Variant and Trim Breakdown

The meaningful factory comparison is between the D14 Deluxe and D17 Special. Dodge did not catalog a D17 homologation or factory motorsport derivative, and individual body styles should not be promoted as separate performance editions.

Exact production totals are often quoted differently depending on whether a source separates series, body style, export assembly, and model-year production. A claimed production number should be tied to a factory serial record or recognized marque reference rather than repeated from an advertisement.

Performance and Dimensional Specifications

Standardized acceleration, quarter-mile, and top-speed figures are not consistently documented for every D17 body. Weight also changes materially between a business coupe, sedan, convertible, and wood-bodied station wagon, so a single curb-weight claim would misrepresent the range.

The absence of a defensible universal top-speed figure is significant when evaluating modified examples. Claims based on axle ratio, tire diameter, or engine rpm are theoretical unless supported by a period test, and they do not account for aerodynamic drag, engine condition, or body style.

Compared With Related Dodge Models

D17 Special Versus D14 Deluxe

The D14 and D17 are closest mechanically. A buyer choosing between comparable examples should therefore concentrate on completeness, body condition, and whether the trim matches the claimed series. Restoring a stripped D17 can cost more than purchasing a complete D14 because Special-specific moldings and interior pieces are not reproduced with the consistency of basic service parts.

Compared With the 1939 Luxury Liner

The 1939 D11 belongs to the first Luxury Liner model year and uses the earlier front-end treatment, including headlamp arrangements that predate the 1940 sealed-beam integration. The D17's front fenders, grille, hood ornamentation, and trim must not be reconstructed by assuming adjacent-year panels and ornaments are visually interchangeable.

Compared With 1941 Dodge Models

Dodge revised its series designations and styling for 1941, with D19 and D22 codes appearing in the passenger-car range. Although the underlying flathead-six philosophy continued, trim, sheet metal, instruments, and many identification details changed. A component advertised merely as fitting a “1940s Dodge” demands part-number verification before purchase.

Ownership and Restoration Notes

Mechanical Support

The flathead six is supported better than many low-volume prewar engines because Chrysler Corporation used related designs for decades in cars, trucks, industrial equipment, and military applications. Routine ignition parts, bearings, gaskets, brake components, and some cooling-system pieces can be sourced through established antique Mopar suppliers. Correct 1940 castings, carburetor tags, air cleaners, brackets, and trim are much less predictable.

An engine rebuild should begin with crack inspection, measurement of cylinder wear, checking the crankshaft and bearing clearances, inspection of valve seats and guides, and a thorough cleaning of oil and coolant passages. Chronic overheating may arise from sediment in the block, a restricted radiator, a worn pump, incorrect ignition timing, or a poorly fitted replacement thermostat rather than from one isolated fault.

Low oil pressure when hot, piston slap, valve noise, smoke under load, and coolant seepage around core plugs warrant investigation. The gearbox and axle are durable when lubricated correctly, but worn synchronizers, bearings, seals, universal joints, and shift linkage can turn an otherwise serviceable car into a tiring driver.

Body and Structure

Inspect floor edges, body mounts, rocker and sill areas, lower door skins, trunk floor, spare-wheel well where applicable, running-board supports, cowl, fender mounting flanges, and the seams where dirt and moisture collect. Thick underseal can hide perforation and poor welds. Door gaps should be judged with the car standing on its wheels because a weak frame or body structure may change shape when lifted.

The station wagon is a different restoration proposition. Its structural and decorative timber requires an experienced woodworker who understands automotive framing, joints, moisture movement, door fit, and finish. Recreating the wood accurately can dominate the cost and calendar of the entire project.

Electrical and Service Considerations

A sound six-volt system works well when it retains heavy battery cables, clean grounds, a suitable battery, and a properly rebuilt starter and generator. Converting to twelve volts may improve compatibility with accessories, but it alters originality and can damage gauges, bulbs, motors, and the charging system if performed carelessly.

Owners should follow the factory lubrication chart rather than modern extended service assumptions. Chassis joints, steering components, wheel bearings, generator, distributor, transmission, axle, cooling system, and brake hydraulics all require periodic inspection. Long storage is often harder on fuel and hydraulic systems than regular, sympathetic use.

Buyer and Inspection Points

A useful D17 inspection places identity and completeness ahead of cosmetic shine. The following checks target failures and omissions that materially affect safety, authenticity, and restoration cost.

A short road test cannot substitute for a cold start and a fully warmed drive. Oil pressure, charging behavior, vapor-related fuel faults, gearbox noise, brake pull, and cooling trouble may emerge only after the car reaches operating temperature.

Collector and Market Relevance

Body style, completeness, and restoration accuracy shape D17 desirability more than a simple series badge. Convertibles and wood-bodied station wagons attract attention because their bodies are scarce and expensive to reconstruct, while a well-preserved sedan can provide the most reliable evidence of factory materials and assembly practice.

Collectors generally favor an intact serial plate, coherent ownership documents, original D17 trim, a correct-pattern interior, proper wheels and hubcaps, and an engine that matches the period specification. A sympathetic mechanical rebuild usually harms historical character less than replacing the drivetrain, dashboard, steering, and suspension with modern assemblies.

Modified cars form a separate market. Flathead hop-up parts, later Mopar engines, independent-front-suspension conversions, and modern brakes can make a D17 faster or easier to use in current traffic, but they do not carry the same research value as a stock car. Reversibility and the retention of original components matter when judging a period custom or street rod.

Cultural Relevance

The D17 belongs to the last uninterrupted generation of American family cars before wartime restrictions ended civilian production after the 1942 model year. Its engineering subsequently became familiar to military personnel and commercial operators through Chrysler Corporation's extensive use of related flathead-six engines in trucks and industrial equipment.

In club culture, stock D17s are supported by prewar Dodge and broader Chrysler-product communities, including restorers who preserve interchange data and factory literature. The same durable drivetrain also made these cars candidates for postwar customization, which explains why complete grilles, dashboards, drivetrains, and original suspension assemblies can be more difficult to find than total surviving-car numbers might suggest.

The D17's strongest cultural role is therefore documentary rather than competitive. It shows what a well-equipped American Dodge looked and felt like at the end of the 1930s design cycle, before postwar ponton bodies, automatic transmissions, higher-compression engines, and smaller-diameter wheels changed the visual and mechanical grammar of the family car.

Frequently Asked Questions

What engine did the 1940 Dodge D17 Luxury Liner Special use?

United States-specification D17 cars used a 217.8-cubic-inch L-head inline-six, commonly rounded to 218 cubic inches and rated at 87 horsepower at 3,600 rpm under the period SAE gross system. Canadian-built and export cars should be checked individually because Chrysler Corporation used market-specific engine combinations.

What is the difference between a 1940 Dodge D14 and D17?

The D14 identified the Luxury Liner Deluxe series, while D17 identified the more highly trimmed Luxury Liner Special. Their basic chassis and United States flathead-six specification were closely related, but the Special received additional exterior and interior appointments.

How can I identify a genuine D17 Special?

Check the original serial plate and its number range against factory references, then compare the body tag, engine stamping, title, Special scripts, moldings, instruments, and interior treatment. No emblem or single trim component is sufficient proof on its own.

Does a 1940 Dodge D17 have a modern VIN?

No. It predates the standardized 17-character VIN. Surviving cars are identified through their factory serial number, body information, engine number, and period documentation, and some old titles may use the engine number.

Are parts available for the D17 flathead six?

Many mechanical service parts remain obtainable through antique Mopar suppliers because related Chrysler Corporation flathead sixes remained in use for many years. D17-specific trim, instruments, interior hardware, correct castings, and body panels are substantially harder to source.

What problems should be checked before buying a D17?

Inspect frame and body-mount corrosion, floor and sill repairs, cooling-system sediment, hot oil pressure, brake hydraulics, steering play, gearbox engagement, six-volt wiring, and missing Special trim. On a station wagon, structural wood condition can outweigh every other restoration concern.

What makes a 1940 Dodge D17 collectible?

Its one-model-year D17 designation, upper-series trim, prewar styling, integrated sealed-beam headlamps, and durable flathead-six drivetrain define its appeal. Collectors place particular weight on complete original trim, coherent identification, stock mechanical specification, and documented restoration work.

Collector Takeaway

The 1940 Dodge D17 is most convincing when restored as Dodge engineered it: a long-stroke six working through a three-speed gearbox, modest tires, hydraulic drums, and a compliant chassis built for real American roads. Adding power is easy compared with finding the correct grille pieces, reproducing the woodgrained dashboard, rebuilding the steering without free play, and preserving the documents that prove the car began life as a Special.

Buy the complete car, not the brightest paint. A D17 with sound structure, legible identity, correct trim, and an honest flathead drivetrain preserves a specific 1940 Dodge rather than merely the outline of one, and that distinction is what gives the Luxury Liner Special lasting value to serious prewar collectors.