2.5 Ranger 1999 Automatic Transmission problem

[Oldman99]

Just inherited a Ranger. Runs good except between 1 and 2 gears has a long transition then a hard thump into 2 gear. Could it need a fluid filter service and perhaps transmission solenoid replacement. I‘m not even sure the transmission model number yet?

 

[franklin2]

Pull the dipstick for the transmission. New fluid will be bright pink. Used but good fluid will be red. Fluid that needs changing will be a very dark maroon. Fluid that is brown is burnt.