I’ve got a 2001 Yamaha Wolverine 350 4x4 that (I think) leaks oil out of the front of the transmission where the front drive shaft begins. Any thoughts on what could have gone bad and how to fix it?

 

It will be the oil seal, behind the UJ spider, split front UJ remove nut in the middle of the spider, attaching it to engine, behind it is an oil seal. Never done it on a Wolverene, but looks like you can pry seal outwards and press a new seal in. On older models of Big Bear etc, you had to take the whole "middle drive gear" unit off, strip it and shove old seals inwards, a right PITA.