I used to shift properly without any hiccups before. Lately, I am hearing a "bang/thud" noise while I shift gear. Its mostly experienced in lower gears and it's really smooth in higher gears.
Why is this happening and how do I resolve it?
There are a couple things that can be causing this.
I would suggest attempting to shift slower, and in proper sequence, to see if it resolves the issue. If not, then adjust the clutch properly. After that, if there is still an issue, take it to a mechanic. If you intend to do the work yourself, purchasing a service manual is a great investment.
One other possibility are the engine mountings or bushes - you should check them for tightness and possible wear.