Wish I could help but I have no clue, I think would change out all the fluids the cost of lube is cheap insurance. JMHO

 

Could it be this trans vent tube broken off?

 

The nipple is on there pretty good. I had to force the hose I installed onto it on and it did not move. It is on the backside of the rzr. I am currently changing all fluids... i don't know what engineer thought using a tiny allen key on the transfer case drain was a good idea...

But even being under the machine I cannot tell what part the mystery nipple is coming off of because I do not have clear line of sight while under it.

 

It is the transfer case vent.

 

Haha you posted the same time I did. Thank you so much CA 800. The adjacent bolt holes in your photo are there in my photo so I agree it is the transfer case vent... unfortunately the transfer case is giving me the hardest time while changing fluids. I might have to suction out the old fluid through the top fill hole

 

When you get the drain plug out replace it with new style.

3234499 internal hex (old number) 2008 RZR
5133731 external hex (new number) 2009+ RZR

Both 3/8-24 straight thread with O-ring seal.

The O-ring is a Parker 3-903

I would get drain plug from Amazon, a lot cheaper than Polaris.

 

When you get the drain plug out replace it with new style.

3234499 internal hex (old number) 2008 RZR
5133731 external hex (new number) 2009+ RZR

Both 3/8-24 straight thread with O-ring seal.

The O-ring is a Parker 3-903

I would gat drain plug from Amazon, a lot cheaper than Polaris.
View attachment 700558

So, I stripped the plug, making sure to clean all the debris from it before hand. I even used penetrating oil and a lighter on it to heat it up, being careful not to get too close to the gasket material.

I did order the new style from Amazon but will have to dremel a groove into the plug tomorrow to unscrew it with a flathead when I have more time.

I am glad that I drained it because when I unscrewed the level check plug watery fluid gushed out. I wonder how many rzrs have met their demise due to these vents.

 

Impact driver and correct socket, works every time:

 

Oh that's funny I do have one of those from when I rebuilt a carb and totally forgot about it. I'm still going to just get the external hex though as I'm not gonna run it without the ski plate.

 

If you have torx bits take one that will almost go in and hammer it in the stripped hex. Then use that impact driver. Usually works. If that strips out then can tap in a bigger hex. One or the other usually gets it done for us

 

Air chisel if you can get to it happens a lot around here especially on these mud bikes that stay dirty lots of stripped bolts and drain plugs nice flat chisel good angle with some pressure and braaaaaaaaaaap it right out.,

Good luck! Common we replace stripped drain plugs with heavy duty hex bolts basically.

 

" I just need to know which fluid to change."
ALL of them and check repair ALL the vent lines from tranny, differential, engine, everything. Your machine won't last long in water with vent tubes missing.

 

" I just need to know which fluid to change."
ALL of them and check repair ALL the vent lines from tranny, differential, engine, everything. Your machine won't last long in water with vent tubes missing.

Indeed. I just checked all the vent tubes and also added air filters to the transfer case, front and rear diff tubes.

The engine vent goes into the air filter.

I don't "think" the transmission has a vent right?

I also changed all fluids with Polaris ps4/angle drive/demand drive/agl fluid. Too many fluids..

 

I took all my vent tube and extended them up behind the passenger seat to keep all the water and mud from getting in to the tube. I even ran my fuel tank vent tube up there a put a inline fuel filter on it to keep it from sucking in dirt . So far everything has worked out.

 

Yes, all gearcases have a vent that I've ever seen

 

it is a vent tube port put a hose on it and run it up as high as you intend to into water then put a j are hook in to it at the top so it has to go over a 180 degrease bent for intrusion

 

Run it above the level of your nose.

 

Vent tube or hose