Something happen this weekend when my brother-in-law was riding it my Polaris Sportsman 330 2007. Now when you put it in Low, High, or Reverse the back tires will not turn. The engine idles up find and in AWD the front tires spin as expected but the rear wheels will not.
I put the ATV up on jacks and toggles across the turf, 2 wheel-drive and AWD switch and the back tire lock or spin as expected. Also the while the engine is running in low or high axel is turning fine; it just will not engage the back wheels.
I fear the worst that there is a problem in the rear differential case and my brother-in-law doesn’t have a job. Can someone please advise?
thanks!

 

Please be a little more model specific as there's not a 2007 Sportsman 330! There's a Trail Boss 330,but it's chain driven. If it's a Sportsman 500 x2 then you have rear diff along with the 700 and 800 models. OPT

 

Thank you for responding

My mistake, it is actually a 2004 Sportsman’s AWD ATV-04 ATP 330 4x4 (axle driven).

Thanks again

 

Just from my experience the rear prop shaft leading from the transmission to the rear differential were very bad about stripping the splines! This is because of the hard to see grease zerk in the box frame,plus some didn't have one! I replaced several shafts on the 330 Magnums that had the same type set up. Just jack up the rear end and turn the tires back and forth. You should be able to feel if the splines are jumping teeth on the prop shaft. This was the most common problem. Usually the differentials weren't the problem and weren't damaged because the pinion shaft in the rear diff was much harder steel than the prop shaft! Hope this helps. OPT

 

The front wheels should not engage if the rear wheels do not turn faster then the front wheels on any Polaris AWD.

 

The rear tires are not turning on their ATP 330 shaft drive machine. If the rear prop shaft splines are stripped the front will still kick in like they mentioned that it does even if the rear prop shaft just spins. I've had this happen on several Magnum 330's to where the front tires would grab,the rear drive shaft wouldn't because of the stripped prop shaft. I haven't had it happen on an ATP,but it's the same type drive system. OPT

 

'wouldn't because of the stripped prop shaft' that certainly sounds like my problem. Is this something a novice should attempt fix?

Thanks Guys!

 

Make sure first that it is the prop shaft by turning the rear wheels and see if the prop shaft either makes noise ,jump splines,or just doesn't turn! That's what the shafts would do on the Magnum 330s that I had to replace would do. Hold the shaft with channel locks if you have to since there's no pressure on it with the tires off the ground to see if it slips. It's not an easy job,but you can do it. You have to jack up the frame area at the back,drive out the roll pin in the prop shaft at the rear of the transmission,remove the complete rear end,either all the way out or just enough to have room to get the prop shaft off. I've even tried moving the transmission up a little(too much trouble!),but removing the rear end is the best way.The prop shaft will either come out with the rear end or you can drive it off the transmission splines. Install the new prop shaft on the rear end pinion shaft(grease it up!! ) and make sure the o-ring is in place. Guide the shaft through the frame as you reinstall the rear end. Then align the hole in the prop shaft with the hole in the transmission shaft and replace the roll pin. Best to have a couple people for this job. Hope it's just the shaft and not the rear diff or tranny!. This is a diagram of the rear end and prop shaft. http://www.cyclepartswarehouse.com/f...2004&fveh=5636
OPT

 

Hey Guys thanks for all the help!

It ended up being that the rear section ofthe drive axle where the female splines are housed actually broke loose from itsweld to the shaft, and so the shaft was spinning freely. A good friend who is skilledwelders made quick business of that.

Thanks again for the direction

 

Did you weld the prop shaft female end that comes from the transmission to the rear differential shaft?? OPT