My 95 wrangler has started having trouble getting past 1500 rpm, which has it needing to shift at odd times, lower rpms and lower speeds than normal. It also doesn't reach the same speeds it used to. Like I get to fifth gear and acceleration is nilch, it just sits around 40 mph. I'm guessing theres something to do with the gears and transmission but I don't know what it is. Any help would be great.