"Overdrive" in italic text on the left side of the boot opposite the Vitesse 6 chrome script badge on the right. Synchromesh was present on 2nd, 3rd and 4th gears. The rear axle was changed to a slightly uprated differential, but retaining the same 4.11:1 ratio and flange sizes as the Herald. Front disc brakes were standard as were larger rear brake drums, and the Herald fuel tank was enlarged, retaining the reserve feature (essentially a curved pickup pipe that could be rotated to dip into the last few centimeters of fuel) of the smaller Herald tank. The front suspension featured uprated springs to cope with the extra weight of the new engine, while the rear suspension, a swing-axle transverse-leaf system, was mostly unchanged from the Herald. The chassis looked outwardly similar to the early Heralds, but in fact was substantially re-designed and strengthened, especially around the differential mountings, improvements which were immediately passed through to Herald production. The dash and instrument panel of the earliest Vitesse was the same as the Herald, with a single speedometer dial featuring fuel and temperature gauge insets. The Vitesse was available in convertible and saloon forms; a coupé never got beyond the prototype stage. The separate chassis construction of the car meant that no additional strengthening to chassis or body was considered necessary for the convertible model, the only concession being additional door catches to prevent the doors opening during hard cornering. A handful of Vitesse estates also were assembled to special order at Standard-Triumph's Service Depot at Park Royal in West London. The Vitesse received a more luxurious interior compared to the Herald; wooden door capping were added to match the wooden dashboard and the car featured slightly better seats and door trims. Optional extras included a vinyl/fabric 'Britax Weathershield' sunroof on saloon models. Exterior trim was also improved with an elongated stainless steel trim piece which extended further down the body than the Herald, including a Vitesse specific piece of trim rearward of the petrol filler cap and satin-silver anodized alloy bumper capping replacing the white rubber Herald items. In September 1963 the Vitesse received its first facelift, when the dashboard was revised with a full range of Smith instruments instead of the large single dial from the Herald (large speedometer and cable driven tachometer flanked by smaller 2 inch fuel and temperature gauges). From September 1965, at commission number HB27986,