I'm anticipating the Motive gears to be noisy. The vendor warned me they will be. Even if they are quiet by Motive standards, they likely will be noisier than Ford Racing. It's the way they are cut.
For me, it was the only way to get the 3.90 ratio which I want to try.
Ford Racing does not make the 3.90 ratio.
I was not ready to jump to 4.10's. I'm searching for sweet spot for road course and driveability with my ported heads and Ford Racing intake manifold.
3.73's lost some low end with the new manifold but great mid and upper range on highway and secondary roads.
Looking for a little extra to dig out of turns but still want decent legs for long straits. Don't want to run out of gear in fourth. On the track, you don't want to use fifth gear.