[Hlynn91]

Basically my question is will the rear end out of a 2wd 90s fourtrax 300 work in a 4wd?

 

[SamUK]

It will indeed

 

[fishfiles]

... the only change I know about between 88-2000 on 2wd or 4wd was in 1998 they started putting a large stainless steel washer on top the seal on the left side the differential , if you have an older rear end that doesn't have this washer and ride the bike in mud then I would get one and install it as an upgrade , I really believe that it helps to make the seal last longer

 

[machinecrook]

@fishfiles I'm guessing they did that in 1998 because they learned about the weakness of the TRX300 right? If that's the case, wouldn't I be better to put a stainless steel washer on the left side of my rear diff for my 1995 TRX300?

 

[mac102004]

I'm sure it would help, but the be all end all 300 rear end repair is for sure the 250/350 rear end swap.