well i picked up this very nice 4 wheeler the other day the guy said its a 86 but the parts site dont show one in this year. any ways i have a total of 3 of these and the front diff on the other 2 seem like the TCD or limited slip diff works like it should but this one acks as an open diff. did any of these 80s big bears come with an open diff or is the limited slip in this one stuck?

this ATV seems to have very few miles on it and every thing works as if it was new. and i have had alot of older ATVS. probly 50+ of them. not a single oil leak or nothing so i really dought the limited slip is wore out.