my 92 f150 4.9l has no power when driving and top speed is about 50 mph. the motor idles just fine. we have changed the fuel filter and still is sluggish under power. does anybody have any suggestions on where to go next? and one more thing..... I lost first and second gear so we removed the top cover of the trans and were replacing the shifting forks but the shifting rods were very hard to remove. we did get them out but there has got to be a reason for them coming out so hard. any suggestions there?