I just bought a 2003 Trail Boss and want to change the oil in the transmission but I can't find the drain plug. My ATV has a solid steel plate under the transmission and there is a hole in the plate (similar to the hole in the plate to access the engine oil drain plug) but there is no transmission drain plug that I can see.

Can anyone tell me where the drain plug is?

Thanks....

 

Drivers side of the gear case at the bottom. Item#35 Dirt Cheap Yamaha, Honda, Arctic Cat & Polaris OEM Parts & Accessories – Cycle Parts Warehouse

 

My age must be getting the better of me.....I can't find the drain plug there?

 

Sure you have a 2003 Trail Boss 330?It's down low at the bottom. Some early models also used a combo drain/transmission brace. They had a bolt and locking nut through the drain plug that had to be backed off. Can't remember what was the last year model to do this.Or you talking about the engine 6mm drain plug? Item #16 http://www.cyclepartswarehouse.com/f...2003&fveh=5623

 

That was it, mine has the combo brace/drain plug. My manufacture date is 12/2002 and it is registered as a 2003.
Thank you very much for the help.

 

Just loosen the lock nut and turn the 9/16' bolt in far enough to remove the big drain plug. When you reinstall the drain plug,back the bolt out until it touches the frame,then turn 1/2 turn more and tighten the lock nut. Sucks I know on this type drain plug!!

 

Got it done. It was pretty easy once you helped me figure that out.
Thanks for your help.