How much (if any) play is too much in rear driveshaft u joints? left, right, up, down play..

Also after noticing a sweat in the right rear axle seal, I noticed play in the differential bearings.

What is my best route to take here?

New bearings, axle seals, u joints?
XMR or Maverick diff upgrade?

I ride lots of 2wd trails and full throttle snow
2013 renegade 1000, 28" swamp lites, only 120 hours

How much (if any) play is too much in rear driveshaft u joints? left, right, up, down play..

Also after noticing a sweat in the right rear axle seal, I noticed play in the differential bearings.

What is my best route to take here?

New bearings, axle seals, u joints?
XMR or Maverick diff upgrade?

I ride lots of 2wd trails and full throttle snow
2013 renegade 1000, 28" swamp lites, only 120 hours