The gearbox is from Ford Sierra (Mercury Merkur XR4Ti in the USA), 1.6L & 1.8L: 1982-91, & 2.0L: 1982-87. The gearbox is not included in the kit, but may be procured locally or through the kit supplier. Various alternative gear ratios can be provided including a close ratio gearbox and a standard ratio gearbox with a higher first gear ratio of 2.98:1. The vehicle speedometer will need calibrating. Several companies are able to do this. Sierra is the most common set of ratios used in the MGA 5 speed.
Granada is more difficult to obtain. In the USA the Ford Merkur box is the same as the Type 9. Many gear ratios are available on special order. 2.445 c/r 1st gear in a Twin Cam can be a pig on hill starts. 3.640 std. barely gets across a stop road junction without changing (with std. diff.) 2.930/2.830 1st in the Sierra/Granada is a nice compromise. Includes paint and sealant. Supply drain plug and mill, drill and tap main case to suit (As drain plugs are not fitted from factory). 12 month guarantee.