Our transmission is acting up on or t-bar belt drive, when you apply force to the t-bar the transmission wants to stop. When you release the force it starts turning again. We removed the transmission removed the old grease, splines and gears seemed fine turned easily by hand no missing teeth or metal in the casing. Put back together with new grease everything seemed fine, still doing the same thing even a little worse. Went to my dealer new transmission 450$ I barely paid that much for entire mower. What bad is the rest of the mower is in great shape hour meter shows 417 hours deck is great mower starts 1st pull every-time. 32" toro t-bar proline 12 hp Kohler Any ideas thanks guys???