what should I ck for code po734 on 2005 ford ranger with 2.3

Question

Need help figuring the problem

Answer 1

P0734 Fourth gear error

Incorrect gear ratio error in fourth,is there any other code condition that accompany P0734 ? The EPC on this this type of transmission is known to give incorrect gear ratio operation. Check the transmission fluid condition if it is dark brownish. This would give a clue that transmission should be changed out, you can also try putting in a transmission additive