The Vanagon Dictionary

Coupling for shift rod in Vanagon/T25 models with Type-4 or Diesel engine

• transmission
• vanagon
• t25

In a Syncro drivetrain, a driveshaft decoupler disconnects the prop shaft so the front axle is no longer driven through it; it is not the front differential lock. A Gerry discussion on 16 May 2004 compares the original non-viscous-coupling layout, which used a driveshaft decoupler, with viscous-coupling Syncros while debating front-lock behavior. The thread is historical community discussion, not a retrofit procedure; identify the drivetrain configuration before interpreting parts or controls.

• vw
• syncro
• drivetrain

The four-wheel drive version of the Vanagon , made between 1986 and 1991. using a viscous coupling arrangement, the front wheels could be made to automatically provide pulling power (at any time the rear wheels began to slip or spin). This term also applies to the four-wheel drive EuroVans , which are unfortunately not imported into the United States.