Collision free transaction and error correction system always a challenging issue in mobile ad hoc networks because of its innate characteristics of mobility, link failures and erroneous channels. An effective scheduling methods and error correction methods will obviously improve the Quality of Service of MANET. In collision free transmission, it assured that transmission takes place without any collision with other nodes. Even though there is a collision free transmission, some time the packets are dropped at receiver due to bit error or packet errors of received packets. This paper provides a way to achieve a collision free and reliable multicast transaction in MANET. The deterministic scheduling approach instead of probabilistic approach for channel access using orthogonal array method provides collision free transaction. A rateless forward error correction as an acknowledgement scheme using Luby Transform Code is used to provide a reliable multicast transaction. To provide greater performance and reliability the neighbors’ node of the multicast group send a message back to the transmitter to stop sending the encoded packets for the receiver node which has correctly decoded the message. The deterministic Schedule and Rateless Forward Error Correction for reliable multicast is simulated using NS2 simulator. The results show that there is observable improvement in throughput.