Originally posted by devil
Does anyone know how to stop the binding in the gears, I have the Tamiya light weight shaft (2mm longer), the new front gears and a brand new gear case but the binding is still there.
Spent some hours on exactly this meself, last night.
First work out *what* is binding.
Is it your bevel pinion? Turn the shaft by hand... if it clicks once every revolution then its the pinion - It will be at the same spot all the time. Note where the rough spot is.
If it jams once every 2.6 turns, its the spur.
Then open up the gearbox carefully, don't pull the gears out yet. Look inside and take note of which teeth are touching between the 2 gears & mark them. Take out the gears and inspect their teeth around the touch point, you may have to clean out any molding excess etc.
If your centre shaft has been dropped on a hard floor before... you could have dented the tip also.
Sometimes just over-tightening the gearbox cover's 3 screws is enough to cause binding. Back them out a half-turn and try again.
Each car needs its own individual finessing, but it does work.