On my 77 Kubota L-285 it calls for 90 wt. in the tranny but I have the bucket up front and a hydraulic pump on the engine using the same oil. So it calls for a much lighter (about 20 wt.) hydraulic oil for the tranny. So far so good I wonder if it really matters what you use. Walt Davies Cooper Hollow Farm Monmouth, OR 97361 503 623-0460