This gearbox is considered weaker than other S13/S14 gearboxes. Single-speed or two speed motors are designed for coupling to gear motor system gearboxes. Later models included locally produced components including&colon; engines, gearboxes and rear axles. Just as important are additives for oils used inside gearboxes, automatic transmissions, and bearings. In contrast to most manual gearboxes, most automatic transmissions have far less effective engine-braking. Gearboxes are limited to six forward gears. No gearboxes or drive shafts are required. Maybach had a British subsidiary, Maybach Gears Ltd, that specialised in gearboxes. The cars were advanced models with 3-speed gearboxes and shaft drive. Both Allison B500 automatic and ZF AS Tronic automated gearboxes are available. All 2.4 litre models have CVT automatic gearboxes. All three engines were available with either five- speed automatic or five speed manual gearboxes. Fires can also start when heat is introduced by bearings or gearboxes that have failed. The deal also included a supply of McLaren-Mercedes gearboxes, hydraulic systems and the KERS feature. Manual and automatic gearboxes are available.