Originally Posted by SMcpot
I emailed Serpent USA and was told that the 47T diff could be put in the 710. But then I remembered the belt tension issue and think that I was told it would fit since the diffs from both cars share the same dimensions. Now, whether the belt will fit around the pulley is another story
And that belt looks almost like it's a different pitch, though I'd expect the belt not to fit around more of the circumference of the pulley if that was the case.
I noticed we still have that problem in 47T pulley but not that obvious as compare to 45T pulley. if you still mange to get the old 705 rear ball diff pulley 47T. use that in your 710 ball diff and put in 720. you can see there is a different in term of smoothness of the belt turn.
Obviously there is still some minor problem there just that how many people care about it.