Okay I recently installed a T5 with a new rear end on my 235. I also have fenton header set-up as well which for now only has about 18" down pipes for exhaust. Last night I was taking it for a loud cruise and wanted to go through all the gears to see what it would do. (by that I do not mean getting on it) I went through the first 4 with no problem, then when I shifted to 5th I bet I had barely 1000 rpm and no throttle response like the truck didnt want to go any faster. I was doing like 50 at the most and had alot more pedal left but the truckjust didnt want to go -any suggestions?
