i have a 1989 tioga 460ford and the trans appears to be slipping when i get around 50mph. the engine revs up but it won't go more than 50. the engine again revs up but there does not feel like the power of the engine is being transferred to the trans. the coach runs fine up until i try to go beyond 50. i have 34000 miles on the rig. some one suggested that i check the catalytic converter. what else should i look for?

 

I am having this same problem any one have any suggestions

 

My suggestion is to take a transmission professional for a ride and get his opinion.