I have a 1995 ford exploder limited 4.0 liter,auto trans/with overdrive.My engine light and 0D light is flashing,codes that come are 335-327-332-336-337-648 is their anyway to fix this without dropping the trans.

Replace the DPFE (Differential Pressure Feedback EGR) Sensor, which affects shifting. That may be all that is wrong. I recommend that you go with a BWD sensor (EGR630), with a Lifetime Warranty, from Advance Auto Parts. Buy it online, using one of their discount codes, for local pickup. It's also called an EGR Pressure Feedback Sensor. Afterwards, reset the PCM. If the problem persists, clean the small EGR passages in the aluminum UIM. Aluminum UIM passages tend to clog worse than composite UIMs. Full synthetic engine oil helps to prevent EGR passages from clogging, due to less evaporation (lower NOACK volitility).