Click or scroll to zoom Tap or pinch to zoom CTA 7650 Transmission Oil Drain Kit Out Of Stock $185.73 SKU CM7650 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Out Of Stock Fully drains transmission oil cleanly by air pressure. Most draining methods use gravity, leaving up to 2.6L of oil left in the system. Services Mercedes 722.6 & 722.9 Transmission. BMW 6HP & 8HP Transmission.