3J Driveline NXG Plate-Type Limited Slip Differential for Mazda MX-5 NA NB 1.8


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3J Driveline NXG Plate-Type Limited Slip Differential

From fast-road and track day to all-out race or drift applications, the 3J Driveline NXG Plate-Type Limited Slip Differential can be set up exactly to suit your requirements. The amount of pre-load and ramp angles are fine-tuned for each application, affecting how the differential locks under acceleration and braking.

Plate-type Limited Slip Differentials have a cross pin which rides up a ramp on the bevel gear, applying pressure to the friction plates and locking both sides of the differential together. For example, a shallow ramp angle of 25 degrees will allow the cross pin to slide up the bevel gear easily, applying more locking force to the differential. Steep 90-degree ramp angles prevent any additional load from being applied, relying on pre-load to lock the differential instead.

Pre-load is used to set how much force is applied to the friction plates before any engine torque is applied to the differential. More pre-load requires less effort to lock the differential, locking it sooner. Due to how plate-type differentials lock, slight noise and wheel judder can be expected at low speeds.

Accel/Decel Ramp Angle (degrees) Preload (lb-ft) Notes
Track 40/90 65-75
Race 30/90 65-75
Rally 30/90 65-75 For more oversteer bias 30/60 or 45/45 ramp angles can be specified.
Sprint 40/90 65-75
Drift 45/45 65-75
Fast Road 50/90 25-35

Suits all MK1 1.8 MX-5s with push-in driveshafts.


3J Driveline




Track, Race, Rally, Sprint, Drift, Fast Road


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