I see the importance of setting the bearing flats correctly. That is sound advice. With the motor out and the worm gear shaft out I checked out the running gear. The rear and mid axle rotate fine including idler. The front axle and idler spin fine. When I drop in the worm gear shaft things get a bit more resistance. Then I mount the motor and I can spin everything fine with the flywheel. Next it goes on the track and after about 1 foot forward the rear truck locks up. It will go in reverse but then keeps locking up going forward. I grab the flywheel and it is bound up.
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