A new valve body improves gear shift responsiveness and control, while an optimization in oil pump size aids in improving operating efficiency. (greencarcongress.com)
This is a transmission internal issue of trying to go into reverse and drive at the same time from a leaking valve body. (yourmechanic.com)
Also, the new system will be joining the present eight - speed transmission used for Kia models with rear - wheel drive, featuring smaller hydraulic oil pump or a high - performance direct control valve body with 12 valves out of 20, which reduce shift times; it allows as well a 34 percent ratio increase over the six - speed automatic, improving thus acceleration and fuel economy. (automotorblog.com)