Busted Center Diff First a little story of what happened before I show you the damage... I took the car to Sears Point for their Bracket Racing. This was the first time I got to add a little race gas to my pump gas and turn up the timing. I was running a 50/50 mix of 100 unleaded and 92 octane with 16-19 psi boost fluxuation. This allowed me to up my timing to 19 degs adv. for 3 runs: 2nd run - 13.311 @ 103.341 - 1.787 60ft. 3rd run - 13.636 @ 102.252 - 1.916 60ft -- On this run, I busted the center diff. I launched the car at about 5500 rpm, and spun all four tires. As I got about 3-4 ft out, the front wheels went bump..bump...BAM! By the time I realized I was wheel hopping it was too late. The BAM sounded like I bottomed out my rear suspension. I wasn't sure any thing had happened until I stopped the car. I got ready to drive home and I heard a little clunk in reverse. Moving forward, I did not hear any unusual noises. My next give away was when I went to pass a bus on the highway. I floored it to go around the bus and the whole car started getting squirrelly. I wasn't sure if I was spinning my front or rear tires, but it was something an AWD car shouldn't be doing. I drove home keeping the rpms below 3000 the rest of the way. The following morning I lifted the car started it and put it in gear... Only the rear tires spun! The following pictures are of the center diff after I pulled it out.

This is a picture of one of the oil passages on the center diff. Before I opened
it up I noticed that this gear was wedged into the opening. I also noticed the diff
jingled!

This is a another view. At first, I thought that was the only problem.

This is a picture of the insides of the center diff. When I first looked inside
I really didn't think there was too much wrong. Then I took a closer look and
noticed the gears were split.

This is a closer look of the split gears. I was lucky that it was pretty clean.

When I removed all the pieces, you can see where the gears wedged themselves
against the casing.

This final picture shows all the pieces removed. The each gear broke into 3 pieces.
I ordered the last Quaife Center Diff in the US (until they get their next shipment)
I will take picture of it when I get it.

Picture of my Quaife Center Diff before installing the bearings.

Picture of my Quaife Center Diff.

The Quaife has been installed in my car for a while now. It was in there
when I ran my 12.5 @ 111 mph. I did not wheel hop this time and the car
left with the wheels spinning. I later found out that the front drivers
side tire was spinning the worst. I now wish I had the Quaife front diff too!!!