Aston Martin DB2, 2-4 & Mk II, Mk III

Additional Notes

• The Aston Martin DB2 and DB2 Vantage (1949-1953) share an identical rear differential fluid capacity of 1.1 liters, indicating both variants use the same differential unit regardless of engine tune.
• The DB2-4 Mk. I (1953-1955) carries the same 1.1-liter rear differential capacity as the earlier DB2 models, suggesting mechanical continuity in the rear axle assembly across those generations.
• A capacity increase to 1.4 liters appears with the DB2-4 Mk. II (1955-1957), representing a 27% rise over the 1.1-liter figure of preceding variants, which typically reflects a physically larger differential housing or a revised axle unit.
• The 1.4-liter rear differential capacity introduced on the Mk. II carries forward unchanged into the DB2-4 Mk. III (1957-1959), covering both the standard and limited slip differential configurations on that model.
• The DB2-4 Mk. II and Mk. III each list two distinct rear differential entries — one standard and one limited slip — both sharing the same 1.4-liter capacity, meaning the limited slip unit does not require a different fluid volume than the open differential.
• Across all eight configurations spanning 1949-1959, the fluid check interval is uniformly set at 4,000 km or 6 months under normal use conditions, whichever comes first.
• The fluid change interval is consistently specified at 16,000 km or 18 months across every listed configuration, applying equally to standard and limited slip rear differentials throughout the entire model range.
• The time-based check interval of 6 months relative to the 18-month change interval means a fluid level inspection is due three times before a full fluid change is required, reflecting a maintenance schedule structured around both mileage and calendar time.