Yes, filling the tank and getting FULL is a problem. One of my 87 Syncros I
had bought used a few years back, and on this one, the tank gets full when
the pump stops. I questioned the previous owner about it, and he told me
that he was having the same problem, but that he had a "retrofit kit"
installed into the gas line somewhere that allowed extra venting of the gas
line. He did not know exactly what was involved, and I have never heard of
this "kit" since.

That 87 is the only Syncro I've owned that fills completely at the gas
station.

As far as other problems with Syncros (besides being harder to maintain),
the only thing I have noticed is that a few times during extreme cold, the
trans can get really stiff. I assume that ice builds up on the driveshaft
after driving in slush, then when it sits the slush freezes.

Other than those things, I love my Syncros and prefer them for driving on
slippery roads.

Michael J Vickey - northwest Pennsylvania

the current VW collection:
84 Vanagon Wlfsbrg blue (parts)
85 DblCab Pickup lt gray
87 Vanagon Syncro GL Wolfram gray
87 Vanagon Syncro GL dove blue
88 Vanagon Carat burgundy
88 DblCab Pickup Tornado red
90 DblCab Pickup navy blue
90 DblCab Pickup Syncro black
91 Vanagon Camper GL orly blue
91 Vanagon Syncro flash silver
93 Eurovan MV Tornado red
95 Eurovan Camper white