Anyone know the specs of the Sport model differential?
Posi?
Limited Slip?
Something else?

 

If by sport you mean the auto; it still depends on what options came on the car. If you PM me a VIN I can tell you which diff is in it.

Paul.

 

Auto, no. (no, no, no, no....)
6 speed MT, it spins both tires at once on take off, but the window sticker for the Touring and Grand Touring lists a different rear end.

 

What Mazda says:

* Tochigi Fuji Torque-Sensing Limited-Slip Differential

During cornering, weight and balance are constantly shifting, and therefore so is traction. Even the best-tuned suspension cannot prevent some of the traction losses that occur during tight cornering. Tochigi Fuji's torque-sensing limited-slip differential compensates for those changing forces and shifting traction by automatically transferring power to the drive wheel with the greatest traction at that moment. That helps keep the strong drive wheel firmly planted, giving the vehicle the traction needed to power through a corner without losing stability.


What the Tochigi patent covers:

A hydraulically actuated limited slip differential which transfers a predetermined amount of clutch torque each time the clutch mechanism is triggered. The differential includes a hydraulic pump mechanism comprising a plurality of fluid supply passages disposed in a side gear and in fluid communication with a cavity defined by the side gear and the clutch mechanism. The hydraulic pump mechanism transfers fluid into the cavity in response to meshing rotation between the pinion gears and the side gears. Sufficiently high differentiation between the output shafts increases the pressure in the cavity to trigger the frictional clutch mechanism with the differential casing to provide braking action between the side gears and the differential casing. The clutch mechanism includes a cone clutch element having a frusto-conical engagement surface which frictionally engages an insert having a complementary frusto-conical engagement surface. The hydraulic trigger and cam separation produce a predetermined amount of axial movement by the cone clutch element and the insert to provide a predetermined amount of clutch torque.
Other References

* "Visco-Lok: A Speed Sensing Limited-Slip Device with High-Torque Progressive Engagement", SAE Technical Paper Series, No. 960718, Feb. 1996.
* "Eaton Electronically Controlled Limited Slip", Eaton Corporation.
* "LSD's Limited Slip Differentials", Tochigi Fuji Sangyo Kabushiki Kaisha.
* "Visco Lok Benefits/Highlights", GKN Viscodrive GmbH.
* "Tech & Trends Gerodisc Slashes Cost, Weight in All-Wheel Drive", Aug. 1992.
* "Disco-Tech", Automotive Industries, Jun. 1992.
* "Development of the Electro-Magnetic Controlled Limited Slip Differentiall Unit (EMCD)", Tochigi Fuji Sangyo K.K.
* "Eaton Automatic Locker", Eaton Corporation.

 

Torsen... It will handle what you throw at it.... for the most part

https://www.rx8club.com/series-i-tech-garage-22/lsd-q-1716/