Originally Posted by dan_vector

Yes. The new diffs filled were about 5gr lighter (filled) each than the 747 diffs. I havent weighed the new gearbox as I just bolted it on at the worlds and haven't looked at the car since but by virtue that it's a smaller assembly with 2.5mm bolts instead of 3mm bolts, smaller springs, adapter, shoes and bell it must be a good few grams lighter than the 747 unit.