Triumph TR250 & TR6 Vehicle Identification
When ordering parts, it is essential that your car is identified exactly, by model year and serial number. Since many part changes were made during model years, the commission number, engine number and body number provide the only positive identification. Quite often, a car’s registration will not show the correct model year. Before ordering parts, please use the space to the right to copy the applicable numbers from your car. Use of these numbers is the best way to ensure that you order and receive the correct parts.
The commission number is the one which should live with your car forever. Engines, gearboxes etc., can be exchanged and thus new serial numbers will appear on those major units. The commission numbers live with the body shell and chassis assemblies. It appears Triumph used the “body number” as a separate identifier, but they seem to have always used the commission number with the numbers reversed and letters used as a suffix rather than a prefix: Thus a car with the commission number CC53876 would have a body number of 53876CC.
For ease of use we use model years as applications wherever possible. Check your commission number against the chart below to determine your car’s “theoretical” model year. In some cases specific commission numbers are quoted in the text where a specification change occured in the middle of a model year range. In general the axle and engine numbers follow the chassis number. The TR gearboxes were essentially the same as the Triumph 2000/2500 series of saloon cars and thus there is considerable intermingling of gearbox numbers including a ‘CD’ series.
It is always useful to know the serial number of the units in your car, as it may give our sales staff a clue as to whether your car has been altered from the original specification. When ordering gearboxes (especially) or engine components it is important to provide us with the serial number of the unit concerned.
The Commission Number for US models from 1968-’69 & for UK models from 1967-’74 is stamped on the left-hand front wheel arch.
The Commission Number for US models from 1970-’76 & for later 1974 UK models is stamped on the left-hand door post.
The Engine Number for TR5/250, TR6 is stamped on the left-hand of the cylinder block.
The Body Number for TR5/250, TR6 is stamped on a plate secured to the right-hand bulkhead panel.
The Gearbox Number for TR5/250, TR6 is stamped on the left-hand side of the gearbox casing.
The Differential Number for TR5/250, TR6 is stamped on the bottom of the differential casing.
|MODEL YEAR (S)
|BODY # START
|ENGINE # START
|GEARBOX # START
|MODIFICATION CHANGES (USA)
|6 Cylinder introduced - TR250, TR5
|New body design - TR6
|Ignition switch moved from dash to steering column
Rostyle wheel caps replaced by plastic caps
Fender beading no longer fitted to rear fenders
|Twin downpipe exhaust fitted to carb models
|Spoiler fitted, chrome bezels on instruments, new seats
J-type overdrive replaces A-type
Same camshaft in PI and carb cars
Number plate lamp on bumper replaced by pair on valance
|Redesigned interior with center door pulls fitted
Chestnut and beige trim introduced
|Rubber overriders fitted
Front bumper raised and indicators
mounted into bumper cut-outs
|Air injection system introduced
|Front indicator lens became all amber