🏷️ Basic Information

Make:

Triumph

Model:

TR4

Product Type:

Parts Catalog / Parts Manual

Product Title:

TRIUMPH TR4 TR 4 Parts PART Manual CATALOUGE

Model Generation Code:

TR4

👋 Introduction

Historical Context:

The Triumph TR4 was a key model in the popular 'Triumph Roadster' (TR) series, bridging the gap between the earlier TR3A and the later, more modern TR5/TR6.

Key Competitors:

MG MGB, Austin-Healey Sprite/Midget, Sunbeam Alpine

Design Influence:

Styled by Giovanni Michelotti, offering a more modern and European aesthetic compared to its predecessors.

Target Audience:

Enthusiasts seeking a classic British sports car with good performance and distinctive styling.

Restoration Support:

Essential for restorers and owners undertaking any work requiring part identification and replacement.

Part Sourcing Efficiency:

Enables efficient and accurate sourcing of correct parts, minimizing errors and delays.

📋 Manual Details

Primary Coverage:

All factory-specified parts for Triumph TR4

Major Assemblies Covered:

Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, Fuel System, Cooling System, Exhaust System, Body Panels, Interior Trim, Chassis

Chassis Codes Covered:

CT1/1L to CT53918L (TR4); CT53919L onwards (TR4A)

Estimated Page Count:

200+

Manual Type:

Parts Catalog / Parts Manual

Purpose:

Identification and ordering of genuine and replacement parts

Language:

English

Format:

Printed

Digital Availability:

Likely available in PDF format through specialist suppliers

📖 Manual Coverage

Engine Parts:

Detailed illustrations and part numbers for engine block, cylinder head, pistons, crankshaft, camshaft, valves, timing gear, oil pump, manifolds, etc.

Transmission Drivetrain Parts:

Components for the gearbox (e.g., TR4 Four-Speed with Laycock Overdrive), clutch assembly, propshaft, differential, rear axle, hub bearings

Suspension Steering Parts:

Independent front suspension components (wishbones, kingpins, trunnions, coil springs, dampers), rear axle, trailing arms, leaf springs (TR4), half-shafts, steering rack, track rods, steering column

Brake Parts:

Front disc brake components (Girling or Lockheed), rear drum brake parts, master cylinder, wheel cylinders, brake lines, brake pads/shoes

Electrical System Parts:

Dynamo/alternator, starter motor, ignition system components (distributor, coil, spark plugs), wiring harnesses, lighting (headlights, taillights), dashboard instruments, switches, fuse box

Fuel Cooling Exhaust Parts:

Carburetor (Zenith Stromberg or SU), fuel pump, fuel lines, radiator, water pump, thermostat, exhaust manifold, pipes, silencer

Bodywork Chassis Parts:

Chassis frame, body panels (fenders, doors, bonnet, boot lid), bumpers, grille, windscreen, convertible top frame, interior trim panels, seats, dashboard fascia

Part Identification:

Visual identification through exploded diagrams and part number cross-referencing

Assembly Disassembly Reference:

Implicit guidance for reassembly by showing how parts fit together

Depth:

Detailed part number identification and illustration; not a repair manual, but essential for sourcing correct components.

📊 Manual Specifications

File Format Type:

Print (original publication)

Diagram Quality:

Typically black and white line drawings with clear labeling

Binding:

Original binding would be stapled or perfect bound

Paper Quality:

Standard paper stock for technical documentation of the era

⚙️ Engine Specifications

Engine Type:

Inline 4-cylinder, OHV (Overhead Valve)

Displacement Cc:

2138

Bore X Stroke Mm:

83.54 x 97.03

Engine Code:

Standard 2.2L OHV (ST) or 2.5L OHV (on later TR4A with modifications)

Horsepower Bhp:

105 (at 4,750 rpm)

Torque Lb-Ft:

132 (at 3,500 rpm)

Carburetion:

Twin Stromberg CD2S or Zenith-Stromberg 175 CD2 carburetors

Fuel Type:

Unleaded gasoline (with appropriate octane rating, lead substitute may be advised for older engines)

Cooling Type:

Water-cooled

🔧 Transmission

Transmission Type:

4-speed manual synchromesh

Overdrive:

Optional Laycock de Normanville J-Type Overdrive (Engaging overdrive in 3rd and 4th gears)

Clutch Type:

Single dry plate, hydraulically operated

Rear Axle Ratio:

3.73:1 (standard), 3.55:1 (with overdrive)

📐 Dimensions

Wheelbase Mm:

2134

Front Track Mm:

1220

Rear Track Mm:

1206

Overall Length Mm:

3912

Overall Width Mm:

1454

Overall Height Mm:

1260 (hardtop), 1270 (convertible)

Unladen Weight Kg:

975

Gross Vehicle Weight Kg:

1315

🛡️ Safety Features

Crash Testing Era:

Pre-modern crash safety standards; minimal structural safety features by today's standards.

Braking System:

Front disc brakes (Girling 9-inch or Lockheed 10.5-inch), Rear drum brakes

Steering System:

Rack and pinion steering

Seatbelts:

Lap belts often fitted as standard, shoulder belts may be optional or retrofitted.

Body Construction:

Body-on-frame construction with separate chassis

💡 Technology Features

Audio System:

Original cars would have had basic AM radios; modern restorations often include upgraded sound systems.

ABS:

Not equipped with Anti-lock Braking System (ABS)

Airbags:

Not equipped with airbags

Connectivity Features:

None from the factory; modern installations may include Bluetooth or USB integration.

🔧 Maintenance

Oil Change Interval Miles:

Typically every 3,000 miles (or 5,000 km), or annually

Grease Points:

Regular greasing of kingpins, UJs, and other suspension/steering points is crucial (often weekly or bi-weekly for active use).

Valve Adjustment:

Recommended at 6,000-mile intervals

Engine Oil:

SAE 20W-50 (mineral oil recommended for classic engines). API SF or SG rated

Gearbox Oil:

EP 90 (API GL-4 recommended for older gearboxes to protect yellow metals)

Differential Oil:

EP 90 (API GL-5 for limited-slip diffs if applicable, GL-4 for standard)

Coolant:

50/50 mix of antifreeze and distilled water

Brake Fluid:

DOT 3 or DOT 4 (check manual for specific recommendation, but DOT 3 is common)

Chassis Corrosion:

Rust is a common issue, particularly in sills, wheel arches, and outriggers due to age and design.

Engine Oil Leaks:

Leaking rocker cover gaskets, oil seals, and sump gaskets are common.

Suspension Wear:

Wear in kingpins, trunnions, and bushes can lead to steering looseness and handling issues.

Overdrive Reliability:

The J-Type overdrive can be sensitive to low oil levels and requires proper servicing.

Example Part Number Format:

Likely uses a numerical system, e.g., AUCxxxx, SPxxxx. Specific examples require manual lookup.

📚 Vehicle History

Triumph Legacy:

Part of the Standard-Triumph Motor Company's celebrated line of sporting roadsters known for their robust engineering and driving pleasure.

Tr4 Introduction:

Introduced in 1961 as a successor to the TR3A, it featured a more modern body and improved comfort.

Tr4A Introduction:

The TR4A, introduced in 1965, featured independent rear suspension (IRS) for improved ride and handling, a significant change from the TR4's live rear axle.

Production Period:

TR4: 1961-1965 (approx. 40,000 units), TR4A: 1965-1967 (approx. 10,000 units)

Manufacturing Location:

Coventry, England

🏆 Awards & Recognition

Classic Status:

Widely recognized as a classic British sports car with a strong following in motorsport and club events.

Enthusiast Appreciation:

Consistently ranked highly by classic car enthusiasts for its performance, styling, and driving engagement.