Hi all, have 2 quick questions:

1) Are metal coolant pipes prone to rust thru, that run from the back to
the radiator? How expensive are replacements? Are plastic available?

2) I have a driveline shutter that increases with speed of vehicle(and
rotation of tire).  It seems to smooth out as the vehicle gets driven
longer distance. I seem to think it is the driveshafts? Could they be
dry or wearing out? There is no clacking?  There doesn't seem to be any
hesitation or fluctuation of the engine. Joel Hembel / Wisconsin / 82
Westy Diesel