TVR Grantura

Additional Notes

• The TVR Grantura rear differential fluid capacity of 1.3 liters is consistent across all six variants spanning the MK.I through MK.IV 1800S, covering the full 1958-1967 production range.
• A 1.3-liter capacity is relatively modest and typical of compact, lightweight sports car rear differentials from the era, reflecting the Grantura's small-displacement, low-weight construction rather than a larger axle assembly found in heavier vehicles.
• The check interval of 1,500 km applies under normal use conditions across all variants. At that frequency, fluid level and condition monitoring would occur well before any significant degradation could go undetected.
• The change interval of 10,000 km under normal use conditions is the same for every listed variant, from the MK.I (1958-1960) through the MK.IV 1800S (1966-1967), indicating no revision to the drain schedule across the model's evolution.
• The ratio between the check interval (1,500 km) and the change interval (10,000 km) means the differential fluid level would be inspected approximately six times between each full drain-and-refill service under normal use conditions.
• The MK.IIa (1961-1962) sits chronologically between the MK.II (1960-1961) and MK.III (1962-1963), and despite representing a distinct variant designation, carries identical differential fluid capacity and service intervals to both surrounding marks.
• The Grantura MK.III 1800 (1963-1965) introduced a larger 1800cc engine compared to earlier marks, yet the rear differential fluid capacity remained at 1.3 liters, indicating the axle unit itself was unchanged by the engine displacement increase.