Polaris 3900 Sticky Wheels

Feb 6, 2018
Milton, GA
Hello - I noticed over the past few weeks that the wheels on my Polaris 3900 began slowing down until finally now they don't spin at all. I can take it out of the water and give the wheels a helping push and they will spin for a while, but soon it stops again. Any ideas on what it could be? The only obvious thing I see that's wrong is water leaking out of the assembly that goes to the tail, but it doesn't seem related.

Thanks in advance!
Update on this after poking around a bit I think the leak might be contributing to the issue. I took off the rear piece where the tail goes into the vacuum and it seems ok. Could it be the seal there? I haven’t been able to find the part for that piece can anyone tell me what it is?