so if i get this right you can use the xray nt1 diff, of what i can see the Front diff, and you can use a 416 pulley if you make the center hole larger?

i`m looking for a gear diff because the track i`m racing on is quite dusty and i really hate rebuilding diffs!

havent seen that spec-r gear diff anywhere and the xray has a quite good price so if i can use that with little modification i`m sold

Its the rear diff from the NT1, and you have to take out most of the center section out of the gear, leaving just enough so that you can screw secure the gear to the center section.

so i need to dremel the std pulley that are moulded in the cover away?

looks like its moulded into the case from what i can see

looks like alot of work that takes more than i dremel, or am i wrong?

if you have any pics of your diff please post them here