**** *** ****. So my car was supposed to be ready today with a nice fresh rear end, prepped and eager for burnouts and launch control set up.

Instead, I got a call from the mechanic with- "we are still waiting for seals for that torsen you're installing". I was like WHAA??? considering I gave him what I thought was a rx7 clutch diff to swap out with the factory LSD that was in my car. And so I drive to the shop to lay eyes on what the **** was up.

So, this is what I saw. This is what came out of my car:



WHAT THE ******* HELL IS THIS?

Then, he shows me the ring and pinion that came out of my car:

The ring had a lot of small chips in it, like this:



And the pinion had been lightened:





Then I looked inside the clutch diff:



Uggghh



So I broke a tooth on my pinion gear. My **** still worked though- worm gears were ok and clutch diff still engaged. Unless I was doing one wheel burnouts and didn't know it. ANYWAYS what is that diff?

These are the markings on the diff that was in my car:

[URL=http://imgur.com/4yZT3.jpg]



What is this thing? Is it a rx7 diff? Is it a Tochigi fuji LSD? See here for pics of that: http://www.miata.net/garage/diffguide/index.html It looks a whole lot like one.

This is what I gave my mechanic- what I thought was a rx7 clutch type diff. He told me it was a torsen. Was he incorrect? I thought with all the miata torsens you could see the gears inside.

WTF is going on? I need some answers please.

And BTW I will now be cryotreating my r&p.

 

Since you have an '03, it's pretty obvious that your OEM LSD would be a T-F, yes.

Post a smaller photo of the LSD you're putting in and I'll tell you what it actually is. Or you can just throw the piece of **** Rx7 LSD away/sell it to someone who drag races and get something that will let the car handle, like a Torsen or an OS Giken.

 

Yes I guess it is a TF. It does have the hexagonal center pin like this:

 

OK so do these TF diffs wear out? I really want my diff to be launch-sturdy which is why I wanted the RX7 diff. BUT I will just use the TF diff if it is better.


ORRRRR

should I go for a welded open diff? I can get one for free.

 

 

Or maybe if I just weld the driveshaft to the axles I would have more reliability. ?

 

 

Mount a tire directly to the driveshaft. Then you can do donuts like a boss.

 

Hmm that gives me a better idea. Why not mount a tire directly to the driveshaft AND a tire to the crank pully? Then I can go sideways 24/7.

 

fuckinghugepic.jpg