The New Venture Gear 3550 was released in the Jeep TJ Wrangler and XJ Cherokee in 2000, as the replacement to the AX15 transmission. It is also found in Dodge downsized pickups. It's last year in the Jeep was 2004, after which it was replaced by the NSG370 six-speed.
The 3550 is a takeoff from the New Process 3500 as found in smaller GM truck applications, though all external case features are different.
Main Drive Gear Retainer For NV3550 Transmission.
Used in 2000-2004