* Automatic Transmission: If your Ranger has an automatic transmission, it likely uses Mercon V ATF. Always double-check your owner's manual for the *exact* specification recommended by Ford for your particular transmission. Using the wrong fluid can damage the transmission.
* Manual Transmission: If it's a manual transmission, it uses GL-4 or GL-5 gear oil. Again, consult your owner's manual to confirm the correct specification and viscosity. Using the wrong type can lead to premature wear.
Regarding the rear axle gear ratio, there's no single answer. The 2007 Ford Ranger came with several different rear axle gear ratios depending on the engine, trim level, and options selected. To find your specific ratio, you need to:
1. Check the sticker on the driver's side doorjamb: This sticker often lists the axle ratio. Look for something like "Axle Ratio: 3.73" or similar.
2. Check the owner's manual: This should list the specifications for your specific vehicle.
3. Look at the differential tag: The differential itself usually has a tag that lists the gear ratio. You'll likely need to get under the truck to see it.
Without checking one of these sources, it's impossible to say what your rear axle gear ratio is.
