Triumph TR series

Additional Notes

• Rear differential fluid capacity for the Triumph TR series ranges from 0,8 to 1,3 liter across the 1955-1982 production span, reflecting changes to axle housing size between earlier and later chassis designs.
• TR3 (1955-1957), TR3A (1957-1961), TR3B (1962), and TR4 (1961-1965) share a 0,8 liter fill and a dual-stage schedule under normal use: a check at 9600 km/6000 miles and a full change at 19200 km/12000 miles, with the change point set at double the check distance.
• TR4A (1965-1967), TR5 PI (1967-1968), and TR6 PI (1969-1976) retain the same 0,8 liter capacity as earlier models but list only a single check interval of 20000 km/12000 miles, without a separate change figure.
• TR7 (1974-1979) carries a larger 1,3 liter capacity, nearly 63% above the 0,8 liter figure used in TR3 through TR6 PI models, indicating a differently sized differential unit.
• TR7 production shows an interval change over time: the 1974-1979 build lists a check point of 10000 km with no mile equivalent given, while the 1980-1982 build doubles this to 20000 km/12000 miles for the same 1,3 liter fill.
• TR8 (1978-1980) and TR8, EFI (1980-1981) specify a 0,9 liter capacity, distinct from the 1,3 liter figure used in the overlapping TR7 production years, despite sharing body platform lineage.
• Both TR8 variants list a 10000 km check interval with no mile conversion, matching the metric-only figure used for early TR7 production rather than the later 20000 km/12000 miles standard.
• Capacity figures under 1 liter, such as the 0,8 liter and 0,9 liter values found across most TR3 through TR8 entries, correspond to typical rear axle housing volumes rather than combined drivetrain totals.
• Check intervals expressed only in kilometers, as seen in TR7 (1974-1979) and both TR8 entries, differ from earlier and later listings that pair kilometer figures with a corresponding mile value.