[UPDATE May 2021: ARP is badly backordered on the wheelstuds we normally use. As such we are temporarily suspending wheelstuds as an option on orders. Please reference the Grande install instructions for several alternative part numbers that may work for you.]
An 8.8 axle option that allows use of the giant Ford Explorer outer CVs as well as inners. This version is the standalone kit for those upgrading an existing Ronin 8.8
The 8.8 Grande Kit includes:
You will need to source your own donor axles from a 2002 to 2010 Ford Explorer as these will provide the needed CVs. Please note only OEM Ford axles are recommended as several aftermarket suppliers have been found to alter the splines at the interface we care about.
Optional: have Ronin install 2.5" ARP wheel studs
The Ford 8.8 is a substantially stronger diff than the factory Mazda rear end but historically Ronin was always limited by the Mazda outer CV joints. Running the Ford outer CV allows us to maintain a larger diameter throughout the shaft. Diameter matters a great deal for splines as it’s the main driver of strength. Torsional strength is a function of radius to the 4th power (IE a shaft 2x the diameter is 16x as strong) so it's worth fighting for.
We’re also aware that Mazda outer CV’s are becoming hard to come by, especially in the T2 variety. Now you can use any year 2002 to 2010 Ford Explorer shaft as a CV donor for the inner and OUTER parts and therefore not sacrifice your OEM halfshafts. This of course helps offset the cost of the upgrade as the used Mazda parts are in demand. Every now and then we also had customers tell us that T2 CVs could be a bitch to disassembly, something that’s not the same for FD or the explorer CVs. Avoid the headache and get a more heavy duty solution in the meantime.
How much power will it hold? Well, wheel hop can still kill most things but folks have been knocking on 8s with our STANDARD axles. We expect these to drop below that barrier. The shafts come with a lifetime warranty so if you do break one just let us know and we'll send you another (international users we ask to pick up shipping).
Finally, if you recently bought a Ronin 8.8 (2019 and newer) and would like to trade in your mint/uninstalled axles and boots for the upgrade kit, select the trade-in option above. Customer responsible for inbound shipping. Condition of parts to be verified prior to shipping Grande outbound.