Fourwheel drive and allwheel drive 505 Driveline arrangements 506 Transmission with gear transfer 507 Transfer case with chain drive 510 Centre differentials 514 Transaxle centre differentials 514 Viscous couplings 514 Transfer unit with chain and viscous coupling 516 Suspension arrangements 519 Fourwheeldrive service 521 Allwheel drive 524 Types of allwheeldrive systems 524 Technical terms 530 Review questions 530