Hey newbie here,

I recently picked up a MKIV Golf. Its been running nicely but i have two niggles that im not too sure about:

a) the gears tend to stick a bit between 3rd & 4th, the transition is not smooth like it should be

b) when i go over humps i get a slight knocking sound from the rear, i've been told this is something to do with the spring in place on the exhaust and that it is a common golf issue?

just wanted a general idea of the problems before a garage drains my savings!!

appreciate any help, cheers