Aisin Seiki AW450-43LE Forward Planet Angled Cut Gears with Low Sprag 1997-2007

Aisin Seiki AW450-43LE Forward Planet Angled Cut Gears with Low Sprag (1997–2007)

The Aisin Seiki AW450-43LE forward planet with angled cut gears and low sprag is a critical internal transmission component designed for vehicles equipped with the AW450-43LE automatic transmission from 1997 through 2007. This forward planetary assembly transfers engine torque through the geartrain while supporting smooth gear engagement under load. Because it features angled cut gears, it improves gear contact strength and helps distribute load more efficiently across the planetary set.

Over time, worn gears or a failing low sprag can cause slipping, noise, harsh engagement, or internal transmission damage. Replacing the forward planetary assembly restores proper torque flow and stabilizes gear operation. In addition, installing a new low sprag improves one-way clutch performance and protects internal components during acceleration and deceleration. Always confirm that your transmission model is AW450-43LE, since similar Aisin units may use different planetary configurations.

This AW450-43LE forward planet assembly works best during a complete transmission rebuild or major internal repair. For example, pairing it with new bearings, thrust washers, clutches, and seals ensures long-term durability and consistent performance. Customers can also browse related components on our site, including AW450-43LE rebuild kits, valve bodies, and hard parts, to complete a full overhaul.

Below is the list of 43LE Parts that we have in stock!
43LE Transmission Parts

Vehicle Compatibility

Common Applications

• Toyota Land Cruiser: 1998–2007

• Lexus LX 470: 1998–2007

• Toyota 4Runner (V8 models): 2003–2007

Fitment Notes

This forward planet with angled cut gears and low sprag fits AW450-43LE transmissions only. Always verify the transmission code, engine configuration, and production year before purchasing. Proper verification ensures correct gear alignment, smooth torque transfer, and extended transmission life.

Also, consult official Toyota or Lexus service manuals for installation procedures and torque specifications.

Below is the diagram of the 450-43LE Transmission!
450-43LE Transmission Diagram