Greetings from Central Oregon. I dug this 1988 Fourtrax 300 out of my grandparents pasture a couple of weeks ago. My grandpa bought this when it was new and used it up until a couple of years ago when he broke the driveshaft at the u joint. Unfortunately pieces of the drive shaft traveled up and broke the out put gear case so that also needed to be replaced. He ended up buying a new one instead of fixing this one and the trusty old ’88 has been sitting in the pasture ever since.

This ATV is rough, but I have fond memories of bombing through the orchards when I was younger so I’m pretty determined to make this one work. I didn’t realize at the time that I was going to have to pull the motor and split the case to put the output gear case back on but I think I can figure it out between youtube videos and the clymer manual.

My questions are…

– I accidentally bought a output gear case for a 4×4 instead of a 2×4. Is it going to cause any problems to bolt this one up instead of the correct one ? I don’t really care if the forward splined end spins while it runs.

– Do I need to replace gaskets etc ? What other supplies will I need ?

– Also, is there anything else I should be thinking about doing while I have the motor on the bench ? Pretty sure this motor hasn’t been touched in 30 years other than general maintenance.

On a handiness scale, I’d give myself about a six out of ten. I’m a little out of my element with this project but I think I can tackle it myself hopefully with the help of you guys.

John