After driving in Heavy snow, It Will not drive forward but will back up in neutral and reverse
what could be wrong on 2006 Mitsubishi Raider
When in drive does it feel like the brakes are applied or said anopther way like the engine is working against a heavy load? You may have a failure inside the transmission which is resulting in locking up the reverse and high clutch. You'll need a transmission tech to look at this for you.
Check the shift linkage. Does the park position work properly and when selecting gears does the shifter feel like it is supposed to?