One problem related to transmission shudder has been reported for the 1999 Ford Ranger. The most recently reported issues are listed below.
Transmission problems: transmission shutters and shakes car violently at start of acceleration, and in between some gears. Transmission clunk into gear intermitently. Shutters at braking as transmission is gearing down. Problem was so bad. In shop 42 days total. Dealer (peyton creamer) tried to fix. Could not. After filing under CA lemon law to get a replacement vehical, Ford offered me a buy back of my vehical. I accepted. I now have a new truck and it too is doing most of the same transmission problems. I no longer own this 1999 truck but do still own the 2000 truck which I too have made a complanint on. Dealer is pretty much refusing to have my truck in thier shop any more unless they hear from Ford.