12 what do I need to disassemble for Volvo XC90 gearbox?

Throttle, valve body and torque converter.

First of all, remove the throttle, clean the throttle and remove the carbon deposit from the engine. Then clean the inside of the gearbox, remove or replace the valve body and remove the torque converter.

The model of Volvo xc90 gearbox is ZF's 8-speed automatic gearbox, which is divided into manual gearbox and automatic gearbox. Manual gearbox mainly produces speed change and torque change through different gear combinations, while automatic gearbox realizes speed change and torque change through hydraulic transmission and gear combinations.