If you have power seats in the Lincoln Navigator, and they won't move forward or backward, it could be that the switch is worn out and needs to be replaced. Also, there is a chance that a switch wire came off or is loose.
because the gears are clicking on each other when they spin.
If you have an automatic transmission, it probably has a forward clutch/band problem.
Is it an automatic or standard? automatic and fluid is not pumping when engine is running
because your tiburon likes the backward motions.
has a full charge won't go forward or reverse
Burn cigarette holes in the seats.
It's in "reverse."
I mean this seriously: Where you can get a good used replacement. There is nothing external that can be the cause, it has had a serious internal failure and either needs overhaul or replacement
bad transmission
the problem with your seats is the "seat control module" it is located under the driver's seat and is about $250 on-line and about 2.5 hours labor to install it at the dealership. I'd suggest buying it yourself and then taking it to the dealer so they don't charge you about another $300 mark-up on the part. It's what I did with mine when the seats stopped working in my 1998 clk. Good luck. Usually there is a green colored knob on the doors that stores memories of seat positions. When this gets 'confused', it jams and the seat(s) will fail to move or just move in one direction only. One thing u could check first is the switch hidden in the door panels behind the knob that moves the seat forward/backwards on each door. Disengage it and wait a few minutes, then replug. This 'resets' the 'memory' and allows the knob function as normal. This solved the problem with mine.
You will need to port forward.