Lexus Models: 1998-2005 GS300 3.0L, 1998-2000 GS400 4.0L, 2001-2005 GS430 4.3L, 2001-2005 IS300 3.0L, 1998-2000 LS400 4.0L, 2001-2003 LS430 4.3L, 1998-2000 SC400 4.0L, 2001-2005 SC430 4.3L Includes new Solenoid Regulator valve and TCC/Lock Up Boost valve and bushing. Convenient drop in valves, No special tooling or machining necessary! Addresses Shuttle, Bind-up or Flair on 2-3 Shift, Slips with throttle in 3rd and/or 4th, TCC Codes & Rough Kick Down at Highway Speeds due to slow TCC release. Installation recommendation: Experienced technician Transmission removal necessary: No