Compatible With: Toyota Jeep A340 AW4 Transmission Transgo Shift Kit A341 A343. This Super High Quality Kit is made by TRANSGO. Fits 4 Speed Toyota 340, 341, 343 and Jeep AW4 "Year models 1985-2008" Contains New TCC/Lock Up Boost Bushing with Valve, New Accumulator Spring upgrades and calibration items. Convenient drop in valves, No special tooling or machining necessary! Addresses Rough shifts when cold, soft shifts, lazy kick down. Reduces TCC Slip/Overheating. Improves and restores correct drivability with added durability. This kit creates nice clean quick shifts that feel great. A nice upgrade and improvement in drivability for Toyota trucks or Jeeps.