Quick Facts

The Series 50 changed considerably within this five-year span. The table separates the 1936 inline-eight car from the Cadillac V-8 models rather than treating the entire run as mechanically uniform.

The annual prefixes matter when inspecting paperwork or ordering restoration information. A car advertised simply as a late-1930s LaSalle may conceal a mixture of adjacent-year sheet metal, trim or running gear, while the correct designation links the chassis to its model year and Series 50 identity.

Why the Series 50 Matters

The mechanical break between 1936 and 1937 defines this group. Although the 1936 car retained an Oldsmobile-derived straight-eight lineage, the 1937 redesign received Cadillac's 322-cubic-inch V-8, giving LaSalle an engine closely related to Cadillac practice rather than the power unit of a lower GM division.

This decision answered a persistent problem for the companion marque. Buyers wanted a lower price than Cadillac charged, but they also expected a LaSalle to possess recognizable Cadillac substance. The 322 V-8 supplied that connection through its architecture, smooth torque delivery and service familiarity.

The cars mattered commercially as well. LaSalle production rose sharply for 1937, when the new body, longer wheelbase and Cadillac V-8 arrived together. The subsequent recession hurt 1938 sales across the industry, but LaSalle survived through 1940 while Cadillac prepared the lower-priced Series 61 that ultimately made the separate marque unnecessary.

Historical Context and Development

Cadillac, LaSalle and the Companion-Marque Strategy

General Motors introduced LaSalle for 1927 to fill a price interval below Cadillac. The make was styled under Harley Earl, whose early LaSalle work helped establish the importance of centralized automotive design within General Motors. LaSalle remained under Cadillac control, with its own badges and dealer identity but extensive engineering and production ties to the senior division.

By 1936, Packard's One-Twenty had demonstrated that a prestigious manufacturer could use high-volume production methods to sell a smaller, less costly car. Lincoln followed a different route with the aerodynamically styled Zephyr and its V-12. Buick's upper series also offered strong eight-cylinder performance without Cadillac pricing.

LaSalle did not require a racing homologation program, and Cadillac did not develop the Series 50 as a competition special. Its engineering brief concerned showroom price, refinement, manageable dimensions and production efficiency rather than motorsport eligibility.

Design Direction

The 1936 body belonged to the rounded, fully enveloped idiom that followed LaSalle's influential 1934 redesign. Separate fenders remained, but the radiator shell, hood, body and luggage compartment formed a smoother composition than the upright luxury cars of only a few years earlier.

For 1937 the Series 50 acquired a longer, lower appearance, a finely divided vertical grille and cleaner integration between the hood and front fenders. Headlamps remained visually distinct, while the narrow grille and pointed prow gave the car a recognizably LaSalle face rather than a reduced Cadillac frontage.

Annual facelifts progressively lowered and broadened the nose. The 1939 and 1940 cars used more horizontal grille treatment, fuller fenders and a wider visual stance. Closed Fisher bodies had steel roof construction, and the cabins used broad bench seats, centrally grouped instruments, painted or wood-grained metal trim and substantial cloth upholstery in sedans.

Engine and Drivetrain

The mechanical specifications below cover the two principal engines. Torque figures and governed redlines were not consistently published in comparable form, so they are omitted rather than reconstructed from later estimates.

The 1937 engine's 322-cubic-inch displacement came from a 3.375-inch bore and 4.5-inch stroke. Its long stroke, modest compression and side-valve breathing favored low-speed pull and quiet running over high engine speed. The block and crankcase formed a more modern monobloc assembly than Cadillac's earlier multi-piece V-8 construction.

Fuel arrived through a mechanically driven pump and a single downdraft carburetor. A conventional battery, coil and distributor handled ignition, while a pump-circulated water-cooling system and pressure-fed lubrication supported sustained road use. Exact carburetor and electrical component numbers must be checked against the year and build documentation because suppliers and calibrations changed.

A single dry-plate clutch connected the engine to Cadillac's three-speed manual gearbox. Synchromesh reduced the need for double-declutching on the upper forward ratios, although first gear remained a low-speed starting ratio rather than a gear intended for hurried engagement. The propeller shaft drove a live rear axle through a hypoid final drive.

The column-mounted gear selector found on later cars opened the front floor and suited the broad bench seat. Correct linkage adjustment is essential: worn bushings, soft engine mounts and misaligned selector rods can create a vague shift or allow the mechanism to bind between gates.

Chassis, Suspension and Braking

LaSalle retained separate body-and-frame construction throughout the Series 50 run. The following table concentrates on durable identification and service facts rather than body-specific measurements that differ between coupes, sedans and convertibles.

Independent front suspension allowed each front wheel to react separately to broken pavement, a meaningful advantage on the patched secondary roads of the period. The live rear axle remained conventional and robust, though worn spring leaves, shackles or dampers can make a deteriorated car feel much less controlled than Cadillac intended.

The hydraulic drum brakes represented mature prewar practice. They can stop a properly maintained car with reasonable confidence at period speeds, but they lack the heat capacity, automatic adjustment and water resistance expected of later systems. Correct shoe arcing, drum condition, hose integrity and equal adjustment across all four wheels strongly affect pedal feel.

Driving Experience and Handling Dynamics

A sound 322 V-8 Series 50 moves away from rest on torque rather than engine speed. The accelerator produces a measured surge, accompanied by little mechanical harshness, and the long-stroke engine is happiest when the driver changes up early. It does not reward repeated high-rpm operation.

Steering effort is substantial at parking speeds, especially with underinflated bias-ply tires, but the wheel lightens once the car is moving. Response is slower than in a postwar sedan, with a large steering wheel and flexible tire sidewalls filtering the first part of every input. On a sweeping road the LaSalle settles into a stable rhythm, provided the dampers and suspension joints are in proper condition.

The independent front suspension absorbs sharp disturbances more effectively than a beam axle, while the rear can still react as a unit over diagonal ridges. Body roll is apparent, but abrupt float, steering wander or repeated pitching usually points to worn components rather than authentic factory behavior.

The three-speed gearbox favors deliberate movements. First gear gets the car underway, second covers much of urban driving, and top becomes the normal cruising gear. Drum-brake response begins with a firm, progressive pedal in a correctly adjusted system, but repeated hard stops quickly expose the thermal limits of the design.

Identification and Originality

Serial, Engine and Fisher Body Information

Identification begins with the model-year serial or chassis information and the Fisher Body plate. The annual Series 50 designation normally appears in marque literature as 36-50 through 40-50, but stamping locations and number formats should be verified against the Cadillac-LaSalle Club's year-specific records rather than decoded from an unsourced online chart.

The Fisher Body plate typically provides style, body, trim and paint information, along with a body sequence number. That body number is not the same as the vehicle serial. On a restoration candidate, compare the plate with the body style, upholstery remnants, paint found beneath moldings and the physical construction of the shell.

Prewar LaSalles do not fit the later collector concept of a standardized VIN stamped in numerous locations. Engine numbers, chassis identifiers and body records can support authenticity, but a claim of “matching numbers” needs documentary explanation. A correct-period replacement engine may be historically defensible while still differing from the unit installed at final assembly.

Year-Correct Details

Grilles, hood side trim, bumpers, hubcaps, dashboard instruments and exterior scripts changed nearly every year. These parts are frequently exchanged because original pieces are scarce and because incomplete cars were often kept running with whatever Cadillac-LaSalle components could be found.

The 1936 inline-eight chassis should not be represented as a Cadillac V-8 conversion without disclosure. On 1937–1940 cars, verify the 322 engine's casting details, manifolds, accessories and mounting arrangement. Later Cadillac flathead parts can resemble the originals while differing in casting, carburetion or accessory placement.

Original paint and trim codes require comparison with contemporary Cadillac-LaSalle color and upholstery references. Modern metallic finishes often use flakes that are too coarse for a late-1930s appearance. Engine enamel, plated hardware, wood-grained interior metal and cloth patterns are equally visible indicators of restoration quality.

Factory build sheets do not survive for every car, so invoices, old registrations, service records, photographs and ownership correspondence carry unusual weight. Documentation is especially valuable for convertible sedans and cars carrying unusual trim combinations, where the cost of reconstructing missing details can exceed the purchase price of an incomplete project.

Variant and Year Breakdown

LaSalle generally treated body styles as part of one Series 50 line rather than creating separate performance trims. This table identifies the major annual mechanical and body divisions, including the related 1940 Series 52 because it is often confused with the Series 50.

Coupes and open cars command much collector attention, but the touring sedan was central to LaSalle's commercial purpose. The 1940 Series 52 deserves particular caution because advertisements sometimes use Series 50 as a blanket description for every final-year LaSalle. Body style and serial evidence must agree.

Performance and Dimensional Specifications

Period acceleration and maximum-speed results are not sufficiently consistent across all five years and body styles to support a single representative figure. Factory horsepower and wheelbase measurements provide a more dependable comparison of the annual Series 50 chassis.

Weight varied substantially with body style and equipment, particularly between closed coupes, touring sedans and open four-door bodies. Rear-axle ratios also affect cruising speed and acceleration. Any precise performance claim should therefore identify the tested year, body, axle ratio and source.

Compared With Related Models

1936 Series 50 Versus 1937 Series 50

The 1936 and 1937 cars share a model name but not an engine family. The 1936 inline-eight is the choice for a collector interested in LaSalle's pre-Cadillac-V-8 engineering, while the 1937 supplies greater displacement, more power and a closer mechanical relationship to contemporary Cadillac production.

The 1937 car also rides on a 124-inch wheelbase rather than the 1936 model's 120 inches. Its styling appears lower and more extended, and the V-8's torque gives it a less busy road manner.

Series 50 Versus Cadillac Series 60

Cadillac introduced the Series 60 for 1936 as a lower-priced Cadillac carrying the senior make's badge. From 1937, the LaSalle Series 50 and Cadillac Series 60 shared important V-8 fundamentals, which reduced the mechanical separation between the companion make and Cadillac's least expensive line.

Trim, body details, chassis specifications and identity remained distinct. A LaSalle should not be rebadged or described as a Cadillac Series 60 merely because components interchange.

1940 Series 50 Versus Series 52

The 1940 Series 52 used the same basic 322-cubic-inch V-8 but introduced GM's newer Torpedo body language, with a more integrated envelope and different proportions. The Series 50 retained a more conventional body treatment. This distinction is visible and should also be supported by the car's identification data.

LaSalle Versus Packard One-Twenty and Lincoln-Zephyr

Packard's One-Twenty used a smooth straight-eight and sold on Packard identity at a reduced price. Lincoln's Zephyr paired streamlined unit-body construction with a V-12. LaSalle answered with body-on-frame construction, Cadillac's side-valve V-8 after 1936 and styling that combined separate-fender formality with increasingly integrated body surfaces.

Ownership and Restoration Notes

The 322 V-8 benefits from specialist knowledge shared with other Cadillac flathead applications, but that does not make every internal or external component interchangeable. Before machining begins, a rebuilder should inspect the block for cracks, corrosion around water passages, cylinder wear, valve-seat damage and previous repairs. Cooling passages require particular attention because accumulated scale can cause local overheating even when the radiator appears serviceable.

Oil pressure, bearing clearances and crankshaft condition matter more than a freshly painted block. A quiet cold start does not prove good health if hot oil pressure collapses after an extended drive. The carburetor, distributor advance, fuel pump and heat controls must work together for clean starting and smooth low-speed response.

Gearboxes are durable when properly lubricated, but worn synchronizers, bearings and selector components are not inexpensive to correct. Differential whine may reflect bearing wear, incorrect pinion depth or damaged gears. Finding another axle is not a substitute for confirming its ratio, width, brakes and year-specific details.

Brake hydraulics should be treated as a complete system. Old lines can rust internally, hoses can swell shut, wheel cylinders can pit and drums can exceed safe machining limits. Owners should follow the period lubrication chart for chassis joints, steering components, spring fittings and driveline service rather than relying on modern extended intervals.

Body restoration usually consumes more time than basic mechanical work. Rust commonly attacks running-board mounts, rocker and sill structures, lower doors, fender edges, trunk floors, spare-wheel wells and body-mount areas. Convertible bodies add alignment problems, missing top hardware and expensive weather sealing.

Reproduction service parts exist for portions of the brake, ignition, fuel and engine systems, while model-specific die-cast trim, grille pieces, lamps, instruments and interior hardware can be difficult to replace. Plating damaged pot metal is rarely a simple cosmetic exercise because cracking and distortion must be corrected before the final copper, nickel and chrome layers.

Buyer and Inspection Points

A Series 50 inspection should establish identity before assessing cosmetics. A glossy restoration assembled from incorrect annual trim can be far harder to rectify than a sound, complete car with worn paint.

A prolonged road test is more useful than several minutes of idling. Watch temperature and oil-pressure behavior after full warm-up, then check for clutch chatter, driveline vibration, brake pull and steering shimmy. Reinspect for coolant, oil, fuel and brake-fluid leakage after the drive.

Collector and Market Relevance

Open cars and coupes generally attract the strongest attention because of their proportions and lower survival rates. Touring sedans remain historically representative and can be better touring choices, particularly when completeness and mechanical condition outweigh body-style rarity.

The 1937 Series 50 has a clear technical identity as the first LaSalle model year powered by Cadillac's 322 V-8. The 1940 cars appeal as the final LaSalles, while the Series 52 adds the visual interest of GM's Torpedo body. The 1936 model speaks to a different collector, one who values the last inline-eight stage of the marque's development.

Collectors typically reward correct grilles, lighting, instruments, wheel equipment, upholstery patterns and documented color combinations. An intact original interior or an unrestored car retaining factory finishes can provide better historical evidence than a heavily restored example assembled from generic prewar materials.

LaSalle values are sensitive to restoration cost because chrome, upholstery, wood graining and bodywork can consume sums disproportionate to the finished car's market value. Completeness therefore carries exceptional weight. A cheaper project missing unique trim may be the more expensive car by the time it is presentable.

Cultural and Club Relevance

LaSalle's cultural contribution came through design and commerce rather than organized factory racing. Harley Earl's work for the marque helped demonstrate that styling could establish a distinct product identity across grille shape, stance, color and proportion, rather than being applied as decoration after engineering was complete.

The Series 50 also illustrates the decline of the companion-marque system. Once Cadillac could sell the Series 61 at a lower price while retaining the Cadillac name, LaSalle's separate badge became harder to justify. Production ended after the 1940 model year, although later design proposals showed that Cadillac considered reviving the name.

The Cadillac & LaSalle Club provides an essential community for owners, restorers and historians. Club publications, judging standards and technical contacts are particularly useful where factory documentation is fragmented or where apparently interchangeable Cadillac and LaSalle parts differ in detail.

Frequently Asked Questions

What engine did the 1936 LaSalle Series 50 use?

The 1936 Series 50 used an Oldsmobile-derived L-head inline-eight commonly listed at approximately 248 cubic inches and 105 horsepower. It should not be confused with the Cadillac V-8 installed from 1937.

When did the LaSalle Series 50 receive Cadillac's 322 V-8?

The Cadillac-built 322-cubic-inch L-head V-8 arrived for the 1937 model year. It was rated at 125 horsepower through 1939 and commonly listed at 130 horsepower for 1940.

How can I distinguish a 1940 Series 50 from a Series 52?

The Series 52 used GM's newer Torpedo-style body, while the Series 50 retained more conventional body architecture. Confirm the body visually, then compare serial and Fisher Body information with authoritative 1940 Cadillac-LaSalle references.

Does a LaSalle Series 50 have a modern VIN?

No. It predates the standardized 17-character VIN. Identification relies on period serial or chassis information, engine numbering, the Fisher Body plate and supporting title or ownership documents.

What are the most expensive Series 50 restoration problems?

Severe structural rust, incomplete convertible hardware, damaged die-cast trim, missing grille components and an incorrect engine can dominate the budget. Interior cloth, wood graining and extensive chrome work also require specialist labor.

Are mechanical parts available for a 1937–1940 LaSalle V-8?

Some service parts are available through Cadillac-LaSalle specialists, clubs and established vintage suppliers. Model-specific trim, instruments, body hardware and certain drivetrain components are much harder to source than routine ignition or brake items.

What makes the LaSalle Series 50 collectible?

It combines late prewar Harley Earl styling with the final years of Cadillac's companion marque. The 1937 adoption of Cadillac's 322 V-8, the annual styling changes and the scarcity of complete open bodies give collectors several distinct reasons to pursue particular versions.

Collector Takeaway

The Series 50 deserves to be judged by year, not by name alone. A 1936 car preserves LaSalle's last inline-eight arrangement, a 1937 records the crucial move to Cadillac V-8 power, and a 1940 closes the marque's production history while showing how quickly General Motors body design was changing.

The best example is not automatically the rarest body or the brightest restoration. It is the car whose serial information, Fisher body, engine type, trim and finish tell one consistent story. When those elements survive together, the Series 50 explains exactly why LaSalle once made sense and why Cadillac ultimately no longer needed it.