I had my tranny rebuilt because of no overdrive and thought it would fix another problem I am having. When Im driving between 45 and 60 in od the rpm's jump around about 100 rpm's on the tack and feels similar to shifting. It is not dropping down into 3rd gear. The shop said a code came up for the fipl (fuel injection pump lever?) I had never heard of one so I was researching and found one guy saying the psd's do not have a fipl. Any one have any ideas about this issue?