Triumph Stag Gearbox
Experience smooth, precise gear changes with our comprehensive gearbox component range. Whether your Triumph Stag features manual transmission with or without overdrive, or automatic Type 35 or Type 65 systems, we supply everything needed for maintenance, repair, or complete overhaul. Each transmission type offers distinct characteristics that suit different driving preferences and touring requirements.
How do manual and automatic transmissions differ?
Manual gearboxes provide direct driver control with precise gear selection and clutch operation. The four-speed unit delivers crisp shifts and mechanical feedback that many enthusiasts prefer. Optional overdrive units extend cruising capability whilst maintaining the manual transmission's engaging character. These systems reward careful maintenance with decades of reliable service.
Automatic transmissions prioritise refinement and ease of use, particularly valuable for touring and urban driving. Type 35 and Type 65 units feature different internal designs and service requirements, reflecting ongoing development throughout production. Our Triumph Stag transmission components maintain these crucial distinctions for authentic operation and optimal performance.
What components typically need attention in manual gearboxes?
Gearbox mountings carry significant loads whilst isolating drivetrain vibration from the chassis. Worn mountings affect gear selection precision and can cause excessive noise transmission. The stiffener units used with automatic transmissions provide additional support for the different mounting requirements of these heavier units.
Internal components including mainshaft, constant pinion gears, and countershaft assemblies work together to provide smooth gear engagement. Gasket sets and overhaul kits include all seals and wearing components needed for complete reconditioning. The gear lever and associated fittings directly affect driver interface and selection precision.
Which overdrive systems were available?
A-type overdrive units provide economical cruising with approximately 25% reduction in engine speed. These hydraulically operated systems engage smoothly and provide significant fuel economy benefits during touring. The main case, adaptor plate, solenoid, and accumulator components work together to deliver seamless operation when properly maintained.
J-type overdrive represents later development with improved reliability and smoother operation. The different internal design requires specific service procedures and components. Both systems feature rear case assemblies with speedo drive arrangements that must match your car's instrumentation requirements.
How do Type 35 and Type 65 automatic systems compare?
Type 35 automatic gearboxes provide smooth operation with three forward speeds plus reverse. The bellhousing and torque convertor arrangements integrate with the V8 engine's characteristics to deliver refined acceleration. Oil cooler systems prevent overheating during sustained high-load operation, particularly important for touring use.
Type 65 units represent later development with improved efficiency and reliability. The different internal design affects service procedures, oil capacity, and component specifications. Dipstick and breather arrangements differ between types, making correct identification crucial for proper maintenance. Parking mechanisms and oil pump designs also vary between systems.
What service requirements keep automatic transmissions reliable?
Regular fluid changes prevent the gradual degradation that affects automatic transmission performance. Modern fluids often exceed original specifications whilst maintaining compatibility with seals and internal components. The correct fluid type and change intervals are crucial for long service life and smooth operation.
Front and rear oil seals prevent leaks whilst maintaining proper fluid levels. Inhibitor switches ensure safe operation by preventing starting except in park or neutral positions. Gasket sets and service kits provide all consumable components needed for regular maintenance. Gear selector mechanisms require periodic adjustment to maintain precise operation and proper safety interlocks. Our transmission components ensure your Stag delivers the smooth, reliable operation that makes long-distance touring such a pleasure.