I'm new to the 4 Wheeler world...but a huge fan...I have had 2 different Polaris 4X4's on a fence job recently. We have been using them to haul fencing materials up a steep incline. What a life saver...I'm a huge fan. After swiching from Low forward to reverse and back to Low forward, they have both intermittently started pulled very hard to the right. They do not do it every time, but it is always to the right. Any ideas are greatly appreciated.

 

Usually it's a hub locking up because of a magnetized armature plate that keeps it in awd or worn internal awd parts(bearings,roll cage,etc) Try changing the hub fluid first and see if it helps.Use only Polaris Demand Drive hub fluid. If it doesn't help, then you probably need to service the hubs and check everything out. This can happen even on machines that have been serviced regularly or even if they are neglected.Dirt Cheap Yamaha, Honda, Arctic Cat & Polaris OEM Parts & Accessories – Cycle Parts Warehouse

 

Very interesting....the owner just informed me that he had just topped off the fluid with ATF. I'll follow your advice. I have ordered the Polaris Drive Fluid. Let's start there. Stay tuned....thank you!

 

Check the CV joints on the front axles as well. My 330 did that same thing and i noticed it most when reversing. they are easily serviced..i disassembled it,greased it well and reinstalled it...it was DRY DRY