Quote Originally Posted by phoenix View Post

By the way, did any of you know that the TH400 found only in motor homes had straight cut gears that are stronger than normal TH400 gears? Since they are not helically cut, they make more noise.
If I remember correctly, the weakness is not in the gears, but in the thrust forces caused by the helical gears, which can crack the transmission case. Straight cut gears don't have those thrust forces.