What is the gear ratio on a 1999 ranger 5 spd 4-cylinder?

There's no single gear ratio for a 1999 Ford Ranger 5-speed 4-cylinder. The gear ratios varied depending on the specific transmission used. Ford used different transmissions in their Rangers over the years, and even within a model year, different ratios could be found depending on the options and intended use (like a heavier duty truck might have different ratios).

To find the correct gear ratios for *your* specific truck, you need to:

1. Locate your transmission identification code: This is usually stamped on the transmission case itself. It's a series of numbers and letters.

2. Use a Ford parts website or a repair manual: Once you have the code, you can input it into a Ford parts website (like a dealer's parts site) or look it up in a repair manual specific to your year and model Ranger. These resources will provide the specific gear ratios for your transmission.

Without the transmission identification code, it's impossible to give you the correct gear ratios.