Hello everyone

Does anyone know approximately how much it would cost to convert a
non-locking differential on a 1986 Syncro GL to a locking differential?  Can
this be done?  My previous mechanic in Boulder, Co (Wolfsburg Automotive)
stated that it appeared that I may have a locking differential minus the
button on the dash.

One more question: Is it possible to have a Syncro with both, front and rear,
locking differentials?

Thanks.

John C.
Jersey City, NJ
86 Vanagon Syncro GL "Ran-again"