Eaton 851 worn

[fdew]

I have a Ferris Pro Cut 20 with a Eaton 851 Transaxel. It appears to be wearing out. It works fine when cold, but after about 45 min loses power and top speed. also if I stomp down on it, it takes a while to get up to speed.

I can think of a few fixes
New one
Rebuilt one

heaver oil
add a oil cooler so it stays cool. Any experence, comments, advice?

Thanks

[khouse]

it won't hurt to try 50 wt racing oil.