[klejeune]

You'll want to get a rear end cover gasket, either from your Cub Cadet dealer or CaseIH dealer. If from the CaseIH dealer, ask for a Farmall Cub rearend cover gasket, they are about half price than the Cub Cadet gasket and the same thing.

Loosen all the bolts on the rearend and pop the bottom loose with a large drain pan underneath. There will be nearly 7 quarts of fluid in a hydro rear end and it comes out quick. Then you can pull the plate all the way off and clean the gasket material from the plate or rear end. Jack up the front of the tractor and let it drain for a long time. Once it's mostly drained take some brake cleaner and spray out the interior really good and wipe out the excess goo.

Now you're ready to put the gasket and cover back on. I don't use any gasket sealer, just put it on dry. Torque down the bolts evenly by hand. Not sure what torque spec, I just do it by feel. Don't forget to change the filter using a genuine Cub Cadet filter. Now fill the rearend through the check/fill plug in the rearend cover plate. Get a good flexible funnel and pour slowly until it starts to come out of the hole. Replace the plug and start it up and let it warm up and then cool down. Now check the fluid level. If it's not up to the bottom of the plug hole, refill until just at the bottom. Remember, hot oil expands, so you want to check it cool.

I buy my HyTran from my CaseIH dealer or my Case Industrial dealer by the gallon for around $17/gal. Some places will sell out of their bulk tanks for much cheaper if you bring in good gallon jugs.

Good luck!