Today I changed another travel motor from planetary failure , I have lost count on how many I have done so far , getting good at it , change the drive motor and 2 filters , and the rock drain filter is kinda hard to do , all in 2 hours------ a new motor is $4,300 plus you have to buy a $593 new spocket wheather you need it or not as the old sprocket doesn't work with the new style travel motor as the offset depth of the teeth are different as the newer one has a bigger planetary housing which is good , the old style motors are no longer avaiable so you have to upgrade , seems to me that isn't really fair to the customer , the OEM parts are no longer available after a little over 1 year of having the machine and you are pentilized $593 to buy something that you really don't need to make a retro fit work , the original unit shouldn't have gone out 2 months and 200 hours out of warranty to start with , by the time you add up parts , labor , oil and filters it's pushing $6,000 per side to do a travel motor job on a T series , throw in a set of tracks and some idlers and rollers and are you really making any money with your T seris machine , a rough estimate we banged around yesterday , thinking of periodic servicing , fuel , track wear , normal parts wear out and failures and the ridcules prices of parts , we figure the cost of operation for the Tseries to be at least $20 per hour if you are lucky , if your charging say $60 per hour , thats 1/3 of your money before you pay any notes or insurance on it , so what are you really getting per hour to operate it