Level Ten for the CD4E. As for the hard parts, I really don't think there is anyone out there that makes a beefier differential or any other of the hard parts. There are no prices on their site for the Level Ten kit avaliable for the CD4E, I think you would have to shoot them an E-Mail and they would be happy to get back with you. At the same time, a lot of guys here have gone with Level 10 and could give you a lot more input there. Just remember that this kit does not includes gears and such.
And as for the MTX-75,
Quiafe makes one hell of a differential that is about as bullet proof as it comes. To get some real world prices, shop around at like ShoShop, or SMP Motorsports, just about anyone listed in the links section of this site. But be looking to spend around $600 give or take. Good luck on finding aftermarket info for this tranny! If you do find something or if anyone else can add to this, please post it here. I am trying to put something together on both of these trannys.
