Table of Contents

1.0   Background & specifications

1.1   GT-6 models

 

1.1.1   GT-6

1.1.1.1   Production overview

1.1.1.2   1967 model

1.1.1.2.1   Features & options

1.1.1.2.2   Contemporary Reviews

 

1.1.2   GT-6 Mk2 / GT-6+

1.1.2.1   Production overview

1.1.2.1.2   Differences between GT-6 Mk2 & GT-6+

1.1.2.2   1968 model

1.1.2.3   1969 model

1.1.2.4   1970 model

 

1.1.3   GT-6 Mk3

1.1.3.1   Production overview

1.1.3.2   1971 model

1.1.3.3   1972 model

1.1.3.4   1973 model

1.2.1   Development history
1.2.2   Engine data & comparison

1.3.1   Description
1.3.2   Gearbox & rear axle serial numbers
1.3.3   Gearbox & rear axle data

1.4.1   Front road spring data

1.5.1   Brake system specifications

1.6.1   Dimensions
1.6.2   Capacities

1.8.1   Racing wheels (USA)
1.8.2   Air conditioning (USA)

2.0   Maintenance & Repair

2.1.1   Workshop manuals

2.1.2   Maintenance schedule

2.1.3   Quick modern lubrication guide

2.1.4   Part numbers & interchangeable parts

  2.1.4.1   List of Triumph GT-6 part numbers and interchangeable parts

  2.1.4.2   Triumph part number system for fasteners

2.2.1   Setting valve clearances
2.2.2   Oil Pressure relief valve specifications
2.2.3   Oil Pressure warning light sensor specifications

2.3.1   OEM carburettor dashpot oil specification

2.4.1   Lubricants & capacities

2.5.1   Re-centralising the brake PDWA
2.5.2   PDWA O-ring specifications

2.6.1   Finding quality replacement Rotoflex couplings

2.7.1   Mk3 variant wiring diagram
2.7.2   Fuse specifications
2.7.3   Lamp specifications

2.8.1   Paint color codes & matching
2.8.2   Body tub mounting to frame

3.0   Modifications

3.1.1   Suggested literature

3.2.1   Overview of performance differences between USA & home-market GT6 models as a result of additional emissions equipment
3.2.2   Increasing compression ratio
3.2.3   Competition camshafts
3.2.4   Camshafts data & comparison
3.2.5   Triumph 6 cylinder heads, data & comparison

3.3.1   Electric fuel pump

3.4.1   Lucas Sports Coil

3.5.1   Differential ratios & interchangeability
3.5.2   Creating a 3.63 differential

3.6.1   Conversion of Mk1 rear swing axle to swing spring

3.7.1   Performance brake pads

3.8.1   Increased output replacement alternator

3.9.1   Addition of seatbelts