I have a 11 HP Toro w/hydrostatic tansmissiont has a tranny issue and was wondering if anyone could help id the problem. The problem is that the the mower jerks or bucks while driving in gear. I don't think it's the brake grabbing as it makes a snapping noise when it happens. The tranny is a sealed unit. Could it be the transaxle? or is it one unit? Thanks!
These hydro transmissions are shipped with grease in the gear box that stops working after a few years. You need to drill a hole in the top of the transmission and push about 1/3 quart of gear oil in. Then seal the hole. I used metal tape. If the shift lever F-N-R is out of adjustment the tractor will go in and out of gear as you drive. Once it is adjusted you should stay in gear and it will run smoothly. It will leak the gear oil out various unsealed spots until it find the level below these spots. Don't do this if you don't want oil drips on the floor! This dripping should slow / stop after a few days.
