* 3-speed automatic: This was a common choice. The exact model number would vary.
* 4-speed manual: Also a frequent option.
* 5-speed manual: Less common than the 3-speed automatic or 4-speed manual, but available in some models.
To know the *exact* transmission in a specific 1985 Dodge D150, you'd need to check the vehicle's documentation (owner's manual, build sheet, etc.) or look at the transmission itself for an identification tag.