Where'd you see the 373?In Super 8.8, the only pumpkins I've seen new are 3.73 and 3.55.
Ford Racing offers the 4.09 ring/pinion set (for the Super 8.8) and that's as high as they can legally go. Though you'd be hard pressed to find one for sale as only a few of us out there have paid to convert it.
You can get the higher ratios (4.30, 4.56, etc) from US Gear, Yukon, Motiv, etc but you'll have to pay a small fortune to have it swapped out by a shop (that has the tools and experience to swap the Super 8.8). I paid $800 for the installation 4 years ago and that was at the bottom of the market then. Most shops have never done the swap and it's considerably more involved than a traditional 8.8 solid axle swap out.
I think they stopped selling them once they went to the D4. Now new it seems you can only find the 3.55.Where'd you see the 373?
Do you have a link or a reason it is illegal?Ford Racing offers the 4.09 ring/pinion set (for the Super 8.8) and that's as high as they can legally go.
When I spoke with US Gear, they have a contract with FRPP to make their 4.09 ring/pinion set which is exclusively licensed for FRPP (meaning US Gear can't offer it of their own, at least that particular product). He indicated that when they were doing the deal with FRPP, 4.09 was the highest ratio they could go and still stay within some sort of CARB or certification (for economy).Do you have a link or a reason it is illegal?