How do you replace the transmission in a 1966 dodge d100?

To replace the transmission in a 1966 Dodge D100, start by disconnecting the battery and draining the Transmission Fluid. Next, remove the driveshaft, exhaust components, and any crossmembers obstructing access to the transmission. Detach the transmission from the engine by unbolting it and then lower it using a transmission jack. Finally, install the new transmission by reversing the removal steps, ensuring all connections are secure and fluid is refilled properly.