Transmission a bit stiff and clunky

[pothole]

Have the Box booked in for fresh transmission oil, but just wanted to check the symptoms with you guys and prepare for the possibility that fresh oil doesn't do the trick.

Gear change has become rather stiff and notchy in most if not all gears. 1, 2 and reverse are the worst, 3rd and 5th the least effected, 4th somewhere in between.

Think there's a very slight clonk selecting 1st and particularly reverse when stationary.

If the oil doesn't sort it, what are the other candidates. Obviously the tranny might just be toast (117k miles, no idea if the tranny oil has even been done - had been planning to do it in any case).

But maybe engine mounts?

The clutch is also very worn and also due to be replace soon. The pedal has been stiff for ages (it was stiff when I bought the car on 76k, I've been nursing the car and carefully rev matching my downshifts ever since!). But recently it seems the bite point has shifted to very low on the travel. I really have to push the pedal right to the floor.

This seems counter intuitive to the high bite you expect with a worn clutch, so perhaps other clutch related components are on the Fritz and this could be influencing the gear change? Perhaps the clutch isn't fully disengaging?

I've had a search and I can get a replacement transmission for about £250, so the worst case scenario isn't entirely horrifying. But anyway, grateful for any ideas / experiences.