hehehe, you are not alone there, dont worry. The amount of times i get a look that says what the hell have you been smoking.......
Ok, drive motor seals!
You have a few choices. Loader parts source will have seal kits at a batter price than the dealer. I got kits from them years ago to re-seal my 763.
Not trying to do them out of some business, but i have had great success with replacing only the Orings on my drive motors IF they are the older style that don't have weird seals that the newer ones do. I re-sealed drive motors a few years back and it cost me $5 per motor as the plastic backup rings were still good. It's a different story if the backups are cracked, you will need a kit.
I got my orings from the local hydraulic seal shop, take the samples in and even the parts they fit to and they will match them for you.
Get your motors apart and inspect the backups and the other seals, then you know where to start.
Hopefully at least a bit of that made sense....