1991 GMC 1500 Pickup Q&A

1991 GMC 1500 Pickup Question: my truck has suddenly stoped shifting or advancing into a higher gear it will go

but stays in the lower gear and reves rpm on the motor.Just moved from the desert in scottsdale az. Any effect from timimg. I am thinking torque converter any suggestions. There ia no leaking of fluid in the transmition -
Answer 1
see previous post -