* Engine: The 4.0L engine itself should bolt in without major issues. However, you'll need to transfer all the necessary sensors, wiring harnesses, and accessories from the 1993 engine to ensure everything works correctly in the 1992 truck.
* Transmission: This is the crucial part. The 1992 and 1993 Rangers likely used different transmissions (manual or automatic, and even different gear ratios within those types). Simply swapping the transmission might not be a direct bolt-in. You need to verify the transmission from the 1993 Ranger is compatible with the 1992 Ranger's transfer case and bellhousing. It's possible you'll need an adapter plate or other modifications.
In short: Installing the 4.0L engine is *more* likely to be straightforward than the transmission. You absolutely must confirm the transmission compatibility before proceeding. Checking the transmission identification numbers and comparing them to parts databases for both years is essential. You might need to find a mechanic specializing in older Ford Rangers to assess compatibility. A seemingly small difference in transmission type can lead to a major headache during the installation.
