Hey guys im lookimg at a g6e turbo and the owner mentioned that it has diff backlash...

These are his words
"It makes a clunk when you go on and off light throttle about 50-60kms per hour most noticeable but happens at higher speed with sudden acceleration. Gentle driving you don't hear it"

Is that something serious? Or more so just maybe a diff bush?

Diff Bushes (rear) are a very common thing in them - Im seeing Superpro Bushes Recommended as the replacement to solve the problem.

Not sure how much to fit - I think (not 100% sure) that the diff cradle may need to be dropped to do it - but a good fulcrum or similar shop should have the tools etc

i have no idea re FG ... but similar drying with a BF produced 'knocking' from the centre bearing? only items that were replaced were both blades & centre bearing. no more 'knocking'