No acceleration when I put it in drive. on 1990 Dodge D150

When I start the truck, I can give it as much gas as I want, but when I put it in drive, no acceleration. Check eng. light is not on.

Asked by for the 1990 Dodge D150
Are the brakes ok and not locked up? And is the driveshaft turning? If the drive shaft is not turning then you may have a worn out transmission.
Long story short, main computer was bad.