OS Giken 1.5 way LSD

SKU: TY421-HA+1

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The OS Super Lock LSD is the culmination of over four years of extensive research and development leading to a revolutionary LSD design. With the capacity to house an unprecedented number of friction plates (up to 28 plates in total) and combined with our patented lock timing system, the Super Lock LSD is able to achieve complete lock in a progressive, smooth, and quiet manner. This effort translates to quick lap times and repeatable tuning and performance.


Each component of every OS Giken Super Lock LSD uses only the highest grade materials and manufacturing processes. They are constructed and finished to extremely tight tolerances to eliminate “break-in” period prior to racing conditions. Expect longer life out of LSD performance compared to its competition. Rebuilds are rarely needed and is recommended to have fluids changed periodically to prolong the life of the unit.

The OS-250R gear fluid is a specially formulated synthetic gear oil that contains the proper amount of gear oil and limited slip additive for LSD protection and reliable locking performance for our RWD applications With that being said, we have had success using a select few non-OS fluids in regards to protection.
Please see our current list below:
Motul Gear Competition FF 75W140 - (FWD Transaxle, AWD, and RWD Applications)
Motul 300 75W90 N/S - (FWD Transaxle, RWD)

 This differential will work in the following:

1992 - 1996 Toyota Mark II / Chaser / Cresta (JZX90)
1996 - 2000 Toyota Mark II / Chaser / Cresta  (JZX100)
**DOES NOT FIT  GX90 / GX100 )**
1998 - 2005 Lexus IS300 / (JCE10) 
2012 - 2016 Scion FRS / Toyota 86 / Subaru BRZ
2006 - 2014 Lexus IS250 / IS350 (XE20)
1999 - 2003 Crown Athlete / Crown Athlete Estate (JZS171 / JZX171W)
1986 -1993 Toyota Supra (MKIII)  

General Shipments - We currently ship 3-4 times a week with our Economy shipping option (USPS), and every weekday with our Standard and Expedited shipping options (DHL, UPS). If an order is placed on Friday or on the weekend, it will be processed and shipped out likely on Monday or Tuesday. However, this is fully circumstantial on product stock and backorder timeline.

How long does shipping generally take? - Depending on where you're located, shipping can range from anywhere to 1 day to 30+ days. Shipping within the United States and Canada is generally 1 to 3 days Expedited, 2 to 4 days Standard, and 4 to 7 days with our Economy shipping option. Shipping elsewhere to say Europe or Australia is generally 5 to 7 days Expedited, 7 to 10 days Standard, and 16 to 30 days with the Economy shipping option.