Mating displays differed in frequency between mated and virgin males. Both engines may be mated to either a 6-speed manual or automatic gearbox. The engine is mated to a 6-speed gearbox. It is mated to a 6-speed manual transmission. The engine was mated to a 5-speed Getrag manual transmission. The engine was mated to a 5-speed sequential shift automatic. It is mated to a 5-speed automatic transmission. All of them mated and four produced offspring. This is mated to an 8-speed automatic transmission. The engine is mated to a new six-speed gearbox. It is mated to a 5-speed manual. The engine is mated to a continuously variable transmission. All engines are mated to a continuous variable transmission. The diesel engine is mated to a 6 speed manual transmission. It travels in nuclear families consisting of a mated pair accompanied by their offspring.