I slaughtered my Torsen... *video*
 

http://vids.myspace.com/index.cfm?fu...deoID=18191701

Strong my ass :eek4:

If anyone is selling a torsen.. Let me know!

"Whoops.." HAHAHAHAHA

Damn, that does suck though.. At least you got it on video

Damn dude, never seen one fail like that. Did the ring gear do that damage to the case? But seriously though- LOL at that last comment. "That's a big-ass hole."

holy shit first time seeing that too! that shit sounded good though man

The line worker that pushed me off the track picked up a chunk of the case for me, and it his impressions of the ring gear in it. I couldnt really see inside, so thats all I can think of right now. I'll tear it apart this week after work to see what happened. I still cant believe the damn thing broke, I allways heard how "strong" the Torsens are..

Maybe the ring gear broke, since it should be the weak link compared to the torsen. Hoepefully it didn't take out the torsen with it.

It looks like the ring gear broke.When you get a new diff,get the ring & pinion cryogenic treated before you install it.

Funny thing is, I was just talking about that, trying to convince my friend to do it when he rebuilds his M3, and it didn't even dawn on me to cryo treat the replacement torsen...

Does anyone know what all it takes for a RX7 diff swap? One of my sevens may have a LSD, and I would be more than willing to sacrifice it for the better of my Miata haha. I haven't researched it at all.

Im wondering if it would be possible to shoot the ring gear out, and not damage the torsen. Im assuming nothing was spared, it would only take one little tooth off the ring gear getting stuck in a gear on the torsen to ruin it. Plus, the rear end is locked up, which confirms my fears even more..

Hey, if you decide to go with a seven lsd you can give me that old torsen you have. If it's repairable, I'll get a ring gear for it.

Im hoping its repairable so I can just throw in a ring gear and case and call it a day. :p

+1 on getting it chryo'd. It's super duper cheap too.

i've never heard they were that strong, just that they don't wear out like the clutch types. I have a friend that's broken 2 on his 270hp m2. That's why FM was offering the Guru differential.

sure its possible. unless ring gear got into the torsen and it chewed on it a bit.

I could see drag racing doing that.

cryogenic treatment
 

I got a couple PM's regarding cryo'ing parts. There are many places that do it, this was the first result generated from a google search
http://www.metal-wear.com/racing_component_prices.htm

Expect to pay $75-100 to cryo a ring and pinion.

The process involves super cooling the item with liquid nitrogen and bringing it up to room temperature again. I am not qualified to give a great explanation, but essentially the extreme cold causes the item's structure to compress in on itself, and when it warms again, material stresses are all but completely removed. It makes the item much stronger and less prone to fracturing.

Alot of folks also cryo their valves, pistons and/or blocks. It promotes even heat distribution.

An instructor reccomended www.300below.com , they are in Illinois so its close to me. I want to cryo treat my next set of brake rotors.. Curious to see how much of a difference it would actually make.

Nothing in our drivetrain lasts at a drag strip.

Damn.

Only parts I expected to fail were the tranny and possibly the drive shaft once I start running slicks with launch control, but I never guessed the rear end.

I've never heard of the driveshaft braking. I'm honestly not surprised about the rear breaking though. Putting that much shock load on small parts will tear them up.

You have to remember that when mazda made the miata it was never intended for drag racing. The reason v8 diffs are so beefy and strong is because drag racing is what people have been doing in those cars for decades. Not to say that you shouldn't drag your miata, thats not what I'm saying at all. But parts are gonna break from shock loading in drag.

i lost my pinion and ring last spring.

have oem replacements shot peened.

talking with the shop owner who rebuilt my diff, he says it's not so much that the miata differentials are weak, but it's the driveshaft. if the driveshaft has worn, stiff u joints, it causes vibration that rips the gears apart.

yah, i had the driveshaft rebuilt.

My friend sheared his driveshaft in his stock M3 running on slicks earlier this season. Split it into two seperate pieces. That suprised me more than the torsen failing actually haha.

Dude, just hurry up and fix it. Lol. So do you still want to line up? I'll run you right now :p

Ha i'll bring the seven out

Lol, that isn't very intimidating at all, But come on then heh.

wow that suck

Tore it apart earlier this week, looks like one of the gears on the torsen cracked in half under stress, and then two or three other gears split cleanly in half as well. the first gear got mangled but the other gears are a CLEAN split straight down the center, kinda unbelievable. Nothing is salvagable..

wow that blows, the viscous don't have as many moving parts do they?

Looks like it's time for a aftermarket LSD.

No gears in a viscous (aside from the ring and pinion of course), just plates inside the actual differential unit, with jelly like fluid inside.. IIRC

I havent found an aftermarket LSD that appeals to me yet doesnt cost an assload. I think I *should* be good if I cryo the gear set on the next torsen, and properly put it to specs.