my transmission will not shift gears I changed filter and gasket what wrong

Hello, There are various sensors in the transmission of your Jeep, and many are on or under the valve body. I do not recommend changing them blindly, as you would have trouble codes, most likely, if there were a fault in the transmission electrical system. If the transmission will not engage forward or reverse gears, you may have mechanical failures, torque converter failure, or a PCM failure. It is best to have it professionally scanned to find the culprit. You can scan it on your own, and post any OBD codes here, but that will only be slightly helpful. The end result is likely this vehicle will need a transmission rebuild, or a PCM reflash/replace/update. http://repairpal.com/jeep-within-10-miles-of-erie-pennsylvania-16510