Standard-Triumph 4-speed manual, 3-rail is a manual gearbox from Standard-Triumph. The Society has 4 vehicles on file with it, 4 with a source we opened and 0 still leads.
Triumph
| Vehicle | Years | Shift pattern | Gearbox source | Members |
|---|---|---|---|---|
| Triumph Spitfire Spitfire Mk I-III (3-rail external box) 4-speed, no overdrive in some cars [1]Applies to: Mk I-III (all) | 1962-1970 | 4 speed, reverse top left | Corroborated | |
| Triumph Spitfire Mk2 / Mk3 (page says 'T2 1967') 1147 cc, no overdrive [2] | 1967 | 4 speed, reverse top left | Corroborated | |
| Triumph Spitfire Mk3 4-speed (3-rail) [3] | 1968 | 4 speed, reverse top left | Corroborated | |
| Triumph Spitfire Spitfire Mk IV (3-rail external box) 4-speed, with or without overdrive [4] | 1970-1974 | 4 speed, reverse top left | Corroborated |
Research notes
Caveats and conflicts (3)
- Source thread does not print a Triumph part code; Fast Marina forum says the 3-rail box is the Herald design. Overdrive units are Laycock de Normanville (type not established for Spitfire here).
- Source thread does not print a Triumph part code; Fast Marina forum says the 3-rail box is the Herald design. Overdrive units are Laycock de Normanville (type not established for Spitfire here). Row says no overdrive: plain 4-speed.
- Conflict: a Fast Marina forum post says the single-rail casing was shared with the late Spitfire "Mk4 & 1500"; Wikipedia says synchro on first arrived with the 1500. Rail type of the Mk IV not settled.
References
- Forum. Andy Mace (VTR) on britishcarforum: "The Mk3 gearbox is identical in every way to the original Mk2 gearbox"; Wikipedia infobox lists a 4-speed manual with optional overdrive on top and third. [link]
- Forum. Andy Mace (VTR) on britishcarforum: "The Mk3 gearbox is identical in every way to the original Mk2 gearbox"; Wikipedia infobox lists a 4-speed manual with optional overdrive on top and third. [link]
- Forum. Andy Mace (VTR) on britishcarforum: "The Mk3 gearbox is identical in every way to the original Mk2 gearbox"; Wikipedia infobox lists a 4-speed manual with optional overdrive on top and third. [link]
- Forum. Andy Mace (VTR) on britishcarforum: "A MkIV gearbox is almost identical, save for a synchro first gear and about 5/8 in additional length"; single vs three rail is told by input spline count (10 three-rail, 20 single-rail). [link]
Categories: Gearboxes | Standard-Triumph
This page was last edited on November 11, 2026. Gearbox codes change by year, engine and market. Send a correction.