I have not had any problems at all with my tranny. I just installed the Mamba about 3 weeks ago but was running a Novak 5.5R before that. In 3 months all I have done is strip one idler gear. I bought spare trans off Ebay at the same time I ordered the 3s lipo. This is to reduce my downtime when things do break. I will see how long it takes before I need it. I lock my diff down as tight as i can get it then tighten my slipper all the way down and back it off about 1/4-1/2 of a turn. This setup has worked well for me.