An aftermarket shift kit would be the easiest way to do this project, if you didn't want to just figure it out for yourself. These kits usually consist of a couple new check balls and a Motorized Valve Actuatorsnew metering plate that gets sandwiched between the wormtrails. This changes the shift logic and, consequently, the transmission behavior. A large part of the reason one way clutches are used is to simplify the act of shifting gears. As patdaly noted above, you can't have two gears of different ratios engaged at the Multi-functional Water Pump Control Valvessame time without risking a very quick stop. This implies that each gear ratio needs a clutch so it can be individually engaged. In a manual transmission, that would be the synchronizer or a BALL VALVESdog clutch. In a planetary automatic , you have friction clutches and one-way clutches. Until recently, the OEMs have had great difficulty in making shifts from one friction clutch to another smoothly. Too much delay between release of the CHECK VALVES lower clutch and engagement of the higher ratio clutch, and you're in neutral. Not enough delay, and you're back to the two-gears-at-once scenario. However, if you put an BUTTERFLY VALVESoverrunning clutch on the lower ratio, then you can engage the friction clutch for the higher ratio without releasing the friction clutch for the lower ratio, because the overrunning clutch will effectively release the lower ratio gear when the higher ratio gear takes up the torque. When you're looking through the service manual, you want to find the "clutch schedule". This is a text chart that will show the gear selections on one axis, individual clutches on the other, and the field will indicate which clutch is involved in selecting which gear. There's often an adjacent chart that indicates the status of the one-way clutches under engine braking. Once you understand what's needed mechanically, then you can go hunting through the worm trails to figure out how to make it happen.

MORE NEWS