Transmission F350 7.3 (torque converter)
 

My F350 is acting strange. It up shifts and downshifts perfect but when I let up on the fuel in 3rd gear, then about a second or two later, step on the fuel after coasting the rpms go up and it grabs a second later instead of immediately. With the overdrive off, it doesn't seem to do it and it only happens in 3rd gear. Please give me ideas as to what this could me. Thanks.