3.308
#26
If there's one thing I know about Bill, its that when you buy one of the MR products, you're not just going to get that product, you're also going to get every part to install it, and then some other parts that go along with what you bought that you have to look up what they do because you had no idea that you actually wanted them, and you'll end up with a small tube of more loctite than you'd ever need to do the install. So knowing bill, the R&P kit will come with new diff bearings, a tube of grey RTV, some loctite, all the seals for the diff, and a crush sleeve eliminator kit, along with a few parts I didn't even know were in the rear end even though I've had a bunch of them apart and swapped ring gears before.
#27
I can't offer "crush sleeve elimination" as part of a kit because that's a specialized machining process where the machine shop has to have the actual pumpkin and gears in their possession to create a solid spacer tube. I can refer people to a respected colleague of mine who offers that service, plus others including reinforced saddle caps.
The following will be explained in more detail when I formally announce the GB, but my plan is to offer people two kit options: "Basic" and "The Whole Enchilada."
"Basic" kit would include the 3.3:1 ring and pinion, a crush sleeve, and a pinion nose nut. This would be for people low-mileage differentials where they are confident that their bearings and seals are reusable.
"The Whole Enchilada" kit would include all of the above plus (4) bearings and (3) seals. All of these would be genuine Mazda parts.
I can also arrange WPC Treatment as an upgrade for either option: WPC - Metal Surface Treatment / Micro Shot Peening
FYI, cryogenic treatment is not recommended by the manufacturer because the gears will be heat treated.
Thanks for your interest and patience!
#39
I have to think above 300whp you're going to pick up some significant overall acceleration compared to stock gearing with a 6 speed. 3.90s are great with 100hp, but as power increases you're really rowing though the gears. Maybe it's different for all out track cars, but these seem like a great idea for those of us who spend most of our time on the street.