could be the fluid level is low
main shaft bearing
Could be a turbocharger, or a low oil level in a manual transmission causing it to "howl".
That only usually only happens in a manual transmission
When the car shakes n it on the correct its becsuse its out of timeing
Converting a manual transmission to automatic transmission is not possible but you can replace a manual transmission to an automativ transmission . That is also an expensive deal.
there is no fluid for a manual transmission
I have the same problem; so far the problem seems to be in the transmission. Maybe the gear that drives the speedometer gear, won't know without taking transmission apart.
car can be started an does run fine.
manual
If your transmission is manual, you will have to change gear. If it is automatic, you won't.
You can use any SAE certified manual transmission fluid in your 1996 Ford manual transmission. Make sure you use manual transmission fluid and not automatic transmission fluid.
A car with an automatic transmission allows you to do less work while you drive. The car does all of the gear changing for you so you just have to concentrate on accelerating and steering. There is also less damage done to the transmission as human error is removed and it is run by a computer.