I have a 2005 Sportsman 700 EFI and I have searched around and I can't find anyone else having this issue. I live in Wisconsin and have a Polaris plow with a front mount (not the belly mount). Been using it for years. Probably a year or two ago I noticed when I am pushing a large amount of snow up on a hill and there is back pressure on the plow blade, it is near impossible to shift out of low (to back up and do more plowing). I have to either get off and try to manhandle/wiggle the ATV using the rear bumper to relieve pressure from the front, try to delicately move forward a little more so I can "roll" back an inch or two to try and relieve pressure, ... But it happens somewhat consistently and usually results in many colorful words from me as I try to get the thing in reverse. I literally have to yank back as hard as I can on the shifter to get it out of low - I am doing it yanking with all my might so hard I wouldn't be surprised if the shifter (or the linkage) eventually snaps or I bend it.
Has anyone else experienced this? I dont think it is anything related to my transmission because it never happens in summer, or any other time for that matter when I am not plowing with a decent amount of back pressure pushing back again the plow.