RIght now I have my atv suspended in the air and when I move the back tires it makes a rattle in the middle of the axle. What could be the problem and how can I fix it

 

When my atv first broke My dad was downshifting to stop from hitting his friends on the top of a levy or going off the sides. HE downshifted and it broke but it doesnt sound like the trans.

 

The Sound is coming from the rear gear case or around it. Can anybody help please. Everytime I move back tires it makes a rattle sound in gearcase.

 

Thanks to absolutley nobody I thought these forums were to help people. I figured it out it is the pinion shaft that is broke in the rear gear case. I know how to take it apart and put it back together, but when i look for the parts online there are always two of them can anybody tell me which one I need to buy.

Look here at these webpages and tell me what is the difference between the two.

On these webpages it is number 19

Polaris ATV Parts 2000 A00CK42AA XPEDITION 425 REAR HOUSING Diagram

2000 Polaris XPEDITION 425 (A00CK42AA) Rear Housing | Babbitts Polaris Parts House

 

Hang loose fella,it's football season and the Cowboys are finally looking good for a change.
May not be your old man's fault. Could have been just the last straw on the prop shaft coupler that connects the rear diff to the transmission. This was the most common problem on the Expedition and Magnum models because the coupler is overlooked a lot of times and the only way you can grease the blame thing is through a cut out hole in the box frame. Place it in gear and turn the rear wheels to see if the coupler just spins or partially grabs. The coupler splines are a lot softer than the pinion shaft on the rear diff,plus water,corrosion doesn't help over the years. This is my best guess since I've had to replace quite a few of these over the years.Item #18 on this parts break down.Dirt Cheap Yamaha & Polaris OEM Parts & Accessories – Cycle Parts Warehouse