TSA ADVISOR

TRA ADVISOR questions should be directed to jwhowland@outlook.com. Here are some common topics:

Here is a bulletized summary of typical questions people commonly have about vintage Triumph TR3 and TR4 cars, categorized for clarity:

🔧 Engine & Performance

Here’s a reference for engine restoration with potential performance upgrades

• What are the engine specifications (displacement, horsepower) for TR3 vs TR4?

• What type of fuel and oil should I use in a TR3/TR4?

• How do I set the valve clearances and timing correctly?

• Can I upgrade the camshaft or pistons for better performance?

• What's involved in converting to an aluminum flywheel or installing performance carburetors?

🛠️ Maintenance & Repairs

Here’s a document with the basics of maintenance

• How often should I change fluids and check valve clearances?

• What are common oil leaks and how can I prevent them?

• What parts are most prone to wear and failure?

• What tools are essential for working on these cars?

• Are there specific torque specs for major engine and chassis components?

⚙️ Transmission & Drivetrain

Here’s a handy reference for asking the right questions for gearbox rebuilds….

• How do I rebuild or adjust the TR3/TR4 gearbox?

• What is the proper clutch replacement procedure?

• How can I check for worn synchros or input shaft bearings?

• What are common rear differential problems?

🔌 Electrical System

Here’s a handy summary sheet for common electrical issues….

• How do I convert from positive ground to negative ground?

• What are common issues with Lucas generators and voltage regulators?

• How can I add a modern alternator or USB charging port?

• What are the wire color codes for TR3/TR4 harnesses?

🔩 Brakes & Suspension

Here’s a handy summary reference your brake and alignment issues…..

• What brake upgrades are available (Girling calipers, dual master cylinders)?

• How do I rebuild front calipers or adjust rear drums?

• What are the benefits of polyurethane bushings?

• How do I set the proper front-end alignment?

🔄 Cooling System

Here’s a handy reference for your cooling system repairs….

• What’s the best way to flush and refill the cooling system?

• Should I convert to an electric fan or aluminum radiator?

• What are signs of a failing water pump or clogged radiator?

⛽ Fuel System

Here’s a handy reference for your fuel system repairs and trouble shooting….

• What’s the correct jetting for SU or Stromberg carburetors?

• How do I fix throttle shaft vacuum leaks?

• Are modern fuels with ethanol harmful to my car?

• How do I replace old steel fuel lines safely?

🧰 Body & Interior

Here’s a summary reference for common topics for the body of older TRs

• How do I fix rust in floor pans, sills, and the rear valance?

• What are the best options for interior restoration (dash, seats, trim)?

• How do I convert to a modern seatbelt system?

• How do I fit a soft top or hardtop correctly?

🔍 Identification & History

Here’s a summary of the basics for ID and model changes for early TRs….

• How can I verify the original engine and chassis numbers?

• What are the production differences between early and late TR3/TR4 models?

• What year is my TR3/TR4 based on VIN or commission number?

• What factory options were available (overdrive, wire wheels, etc.)?

🧭 Upgrades & Modifications

Here’s a summary for your reference for potential upgrades….

• What are the best performance upgrades for reliability and drivability?

• Can I add a 5-speed transmission conversion?

• What tire sizes and modern wheels fit without rubbing?

• How do I improve lighting (LEDs, halogen conversions)?

🧑‍🔧 Ownership & Community

• Where can I buy reliable parts (NOS, reproduction)?

• Are there Triumph car clubs or forums I can join?

• What’s the current market value of TR3/TR4 models?

• What should I look for when buying a used or restored TR3/TR4?