Clang from drivetrain

My 2001 Jimny has just started to make a clanging noise when pulling away in first or reverse. (in 2wd)

It doesn't do it if starting off gently in 2nd .

Gear changes have to be made carefully to stop the noise occurring, and the car travels normally once in gear up to 60 mph (I don't go any faster).

I suspect the rear propshaft UJ and indeed I can detect some movement in it when checking by hand, but it doesn't seem terminal yet. But would the collective wisdom be that it is probably the culprit and it is echoing along the drivetrain?

There only seems to be one Hardy Spicer UJ on the rear propshaft. What form of joint is on the front end?

Thanks for your thoughts,
Roger

Might be worth checking the transfer box mounts, the aluminium parts are known for breaking and the rubber bushes that mount it to the chassis can split. Also worth checking the rear engine/gearbox mount, it's made up of 2 metal plates bonded to rubber, these can separate and cause a fair bit of movement. Can't really tell by looking but if you give the gearbox a good shove from under the car you'll know if it's good or bad.

Thanks everyone. It was the UJ. Replaced now and all OK.