“The Volvo Guys” in Toronto, Ontario, can alleviate this meticulous and arduous process same day. They use a high speed gear with the highest quality and hardest material that will simply never break again, by far better than the original. Sure beats ruining an expensive cluster. They do great work,...

This article describes what the TCV does. http://www.wothrline.com/Cars_engine/HW/tcv__turbo_control_valve.htm Note that high performance TCV gimmicks can ruin your cars engine. I installed an ARD unit in mine looking added performance like their selective testimonials only to fine it ran worst, it ...