Limited Slip Diffs & LSD Rebuild Parts

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Limited-Slip Units (71-92)
Limited Slip Unit 84-85 12A and 13B (Stock) No Longer Available
86-88 Non-turbo GXL No Longer Available
86-92 Turbo (Stock) 27-200B-P090

 

Kaaz LSD 1.5 Way* (Road Racing)
KAAZ LSD 84-92 N/A DBZ1810
84-92 N/A WPC** COATED DBZ1810-WPC
87-88 TURBO SBZ1310
87-88 TURBO WPC** COATED SBZ1310-WPC
89-92 TURBO SBZ1315
89-92 TURBO WPC** COATED SBZ1315-WPC
 
Note- If you have an 89-92 RX7, please let us know if your original diff was open or Limited Slip.

*The 1.5 Way LSD (shown above) is ideal for road racing because under deceleration the diff does not lock up as aggressively, allowing for more control and traction going into turns. The 2 Way LSD (shown below) is ideal for drifting because under deceleration the diff does lock up, allowing for better control when sliding. Kaaz diffs are known for their consistancy and quality. Kaaz LSDs are considered to be far superior to stock LSDs and are widely used in racing and drifting circuits.

Driving styles differ greatly. This is a general definition; there are certainly instances where these definitions will cross over.

**WPC is a coating applied to the LSD to allow for less noise when turning. If you will be using this LSD in a street car and would prefer not be noticed every time you turn, it is recommended that you get WPC coating. However, if you do not mind a loud "banging" noise when turning, WPC coating is not needed.

Kaaz LSD 2 Way* (Drifting)
KAAZ LSD     84-92 N/A DBZ1810-2
84-92 N/A WPC** COATED DBZ1810-WPC-2
87-88 TURBO SBZ1310-2
87-88 TURBO WPC** COATED SBZ1310-WPC-2
89-92 TURBO SBZ1315-2
89-92 TURBO WPC** COATED SBZ1315-WPC-2

 

Kaaz Gear Oil
Kaaz recommends using ONLY their gear oil in their LSDs. Using synthetic oil will destroy your diff.
Part Number (per 2.0 Liters) GL-5/80W-90

 

Turbo Diff Stub Shafts
87 Turbo LSD
(-608385) 		27-270A-P016
87-88 Turbo LSD
(608385+) 		27-270B-P019
89-92 Turbo Left Viscous (Short) 27-280B-P094
89-92 Turbo Right Viscous (Long) 27-270A-P094

 

Torque Sensing Limited Slip ("Torsen LSD")
TORSEN 84-92 Non-turbo MZTX-TORSEN1
93-95 Twin Turbo 27-200E-P099
These very unique torque sensing differential limited slip units are now available for 84 and later RX-7's. They really are the absolute best design for rear traction under ALL different conditions. It is able to transmit far more torque to the wheel that still has traction than any other type of differential. It uses the friction of the worm gear teeth and the thrust washers for the differential limiting force. In comparison with viscous type, or friction type LSD, it has the following benefits:
1) Large bias ratio torque proportioning
2) Less change of bias ratio over time of car use
3) No special differential oil or LSD additives needed
4) Improved overall traction and improved controllability under acceleration.
5) Virtually no change of torque sensing or traction control through differential temperature range.

 

81-88 Limited Slip Differential Rebuild Clutch Parts:
Cone Spring
(2 needed)		 Non-Turbo 27-2590-M020 Cone Spring
Turbo Not Used
LSD Disc w/inside pins Non-Turbo
(Uses 4)		 27-2560-M020 Inside Pin Disc
Turbo
(Uses 4)		 27-2560-P020
LSD Disc w/outside pins Non-Turbo
(Uses 4)		 27-2580-M020 Outside Pin Disc
Turbo
(Uses 6-outer)		 27-2660-P020
Turbo
(Uses 2-inner)		 27-2580-P020
Use the high performance parts below for stronger lockup. Interchange these thicker parts
to create a thicker stack, which will have a higher clamping force.
LSD Disc w/inside pins +.1mm
(Uses 4)		 Non-Turbo 27-2570-M020
Turbo 27-2570-P020
Oversized Thrust Washer (Two Needed - High Performance) Non-Turbo
+ .2mm		 27-2530-M020
Turbo + .1mm 27-2530-P020
Turbo + .2mm 27-2540-P020

 

 

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