Parts for troy built can be ordered from a MTD service center (cub cadet, white, troy, yard man, etc). Some deals will repair the tiller models and stock parts. As far as the ammount of play in the rear output shafts, the only play in mine is in rotation. With the engine off and the drive in high or low gear, the tines can rotate roughly 5 degrees. Even though this tiller is 25 years old, there is no other play in the output shafts. I am not quite sure what is causing you woble, I would check to see that the rear housing for the output shafts in secure on the drive shaft tube. When you replace the rear seals, it is VERY IMPORTANT that you remove all rust and any burrs from the shaft. When I replaced mine, I used scotchbrite and a little gear oil. It takes a little time if you have tough burrs, but it is gentile on the machine and leaves almost no abrasive residue (nice finish too). Don't bother trying to get generic seals at an auto parts store. I got the kit from a mtd deal. It had all the seals for the trans, replacement gaskets for the cover plate and output shaft plate, and sealant. Cost me about $22. Wish you the best of luck.
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