Cyrus wrote:
Do they have a driveshaft end and a gearbox end?
No, you can flip them 180 degrees as suggested.
If installing new joints at each end, doesn't matter which way round the driveshaft is afterwards.
If only changing one joint, there's arguments for both flipping the driveshaft and keeping it in the same position. Flipping it might make it noisier, at least at first, it may or may not make it last longer.
Best practice is probably to rotate the driveshafts every few thousand miles so they wear evenly, but I doubt anybody does that. I'd settle for putting the best joint on the wheel end of the shaft, reason being that the gearbox joints seem to be more prone to damage and I'd rather replace an old joint than a brand new one.
The joints themselves do have an inner (driveshaft) and outer (mounting). I've come across a variety of types, seems VW had them made by more than one manufacturer and/or changed the casting over the years. A general rule that appears to work for all the types I've encountered (save some expensive and nasty replacements) is that 'flat' faces are 'outer' faces (i.e. mounting side). Examine the components carefully and you should see what I mean. The ring on the outer cage is the outer (mounting) edge.
Examine carefully before dismantling.
DO NOT mix parts between joints!!
Use new bolts, best are the ones with 12 point TZN heads.
Torque is 45 Nm.
Never hit anything you want to keep with a hammer
