1、Vehicle Fitment: The kit is replacement for Toyota RAV4 2006‑2017, replacement for Toyota ACA31 ACA33 ASA33 ASA38 ASA42 ASA44 AVA44 GSA33 GSA38 ALA49 ZSA44 ALA41. 2、OE Number: Rear differential viscous coupler replace part number are 4130342023, 4130342020, 4130342021, 4130342022. Please check the number before ordering. 3、Powerful Function: The viscous coupling assembly ensures smoother shifting of the automobile transmission, and also effectively reduces vibration and noise at high speeds, enhancing driving comfort. 4、High Efficiency: Efficiently transmits engine power to the transmission, providing quicker response and acceleration. With high fault tolerance and can withstand large torsion, making the car smoother when starting and accelerating. 5、Strong Durability: Manufactured from high strength and abrasion resistant metal materials, rugged construction ensures that the coupling assembly can maintain good working conditions in a variety of harsh road and weather conditions.