GrimlokTT said:
I used Motive Gears, and I chose the Detroit Truetrac because it is, for want of a better way to describe it, a torque splitting differential more than a limited slip. It doesn't use clutches to transfer torque from side to side, it uses a combination of worm gears and conventional gears to split torque. Since a worm gear can turn a conventional gear, but a conventional gear cannot turn a worm gear, it functions by preventing the torque load on the wheel with less traction from trying to rotate backwards instead of forwards. A conventional limited slip does this with preloaded clutch packs in the differential, which can work well most of the time, but are subject to more wear and slippage. My Cobra differential had approximately 21,000 miles on it, but I could overpower it by jacking up one rear wheel and turning it by hand, so it was slipping a lot more than I like. The Truetrac, on the other hand, will last for the life of the rear end with minimal maintenance and care. No clutches to wear out, and it is plenty strong for the torque level that a Mach1 has. As for gear noise, I have a very minimal amount because of setting the backlash of the gears on the tight side. It only comes in around 42-45 mph, and when I set up the gears I knew that it would be there. I set it up this way because I wanted to eliminate as much of the drivetrain backlash as I could (the lash of different parts adds up to contribute to the "clunk" that many IRS systems have when shifting gears). It isn't possible to eliminate all of it, but it can be reduced a fair amount. As far as me doing the install, I have decided to do all my own work on my Mach1. It is out of warranty in a couple of weeks anyway, and I used to be an ASE Master Auto Technician and a Chrysler Gold Certified Master Technician, so I'm fairly qualified to do anything on this car that it might need done.
