Well With The Check Engine Light on It can Be many problems. If The Check Engine Light Blinks when you hit The gas and The car stutters makeing it feel like a tranny problem it might be a misfire. A misfire can be caused by spark plugs but most likey in the navigator it is a ingnition coil problem. 1st i would go to a repair shop and put it on the the computer to find out the trouble code for the check engine light and take it from there.
If you mean stalling in Drive when stopped at Traffic lights. I had the same problem with my 2000 Lincoln Navigator. It was a clogged transmission filter. I changed the transmission filter & oil. The problem disappeared immediately. 24,000 miles later all is still good.
sounds more like transmission slipping diff slipping would cause loud grinding or howling noise
If no forward or slipping forward suspect problem in the forward clutch and circuit. Reverse does not use the same applied components
The 2000 Lincoln Navigator most likely suffers from the same intermittent odometer problem that has plagued many Ford vehicles (1999 - 2003 F150, F250, F350, Expedition, and Explorer). Lincoln Navigators have also been suspected of having the same problem. It would be helpful if a Navigator owner could confirm that the same problem does exist in the Navigator. iSee the following site for a discussion of the intermittent odometer problem. http://www.odometer-repair.com . I'm another owner confirming same problem. I have a 2001 Lincoln Navigator with same problem.
That is how the car communicates a transmission problem if you couldn't feel it.
transmission is slipping
My advice would be to have the transmission fluid and filter changed. If that does not correct the problem you need to have the transmission rebuilt by a professional.
A problem has been detected with the air suspension system Take it in for servicing
On a 2003 Lincoln Navigator : A problem has been detected with the Anti-lock Brake System It could be a fuse , a sensor , or some other problem As long as the red " BRAKE " light is not on in your dash , you still have " normal " brakes
Your engine will speed up & the car won't go any faster (transmission slipping) Or you can pull the dipstick & smell the Transmission Fluid if it smells burnt you may have a problem with the transmission.
If the gears are slipping on a 1995 Honda Civic then the transmission is worn. The transmission will either soon need to be replaced or repaired.
Bring to a shop that has an ABS scanner to determine the problem