Vibration nosie when driving

Hi all

Freelander newbie here
just brought a 2001 kseries 1.8 freelander and for a small sum of 287 cheekly won on ebay with a brand new tow bar for free

i have notice is i am in low revs 2nd 3rd 4th 5th gears under 2k and i put my foot down i get a massive vibration i am thinking maybe a rear diff mount reciepts prove it has had 2 diff mounts replaced rear left and right but not the front one how can i check this

The IRD bracket was known on some to have cracked and allowing the vibration. But the Land rover TSB states you should get a vibration at 4000 RPM whereas yours is at 2K. Get underneath it and investigate, see what's lose or moves about freely or with no resistance. See if the gearbox and engine mounts are good.