* Manual Locking Hubs: These require you to manually engage and disengage the front hubs. They'll have a lever or knob on each front hub. To lock them in for 4WD, you turn the lever/knob. They'll remain locked until you manually unlock them. This is the more common type on older Rangers.
* Automatic Locking Hubs: These hubs automatically engage when the transfer case is shifted into 4WD. You don't need to manually do anything with the hubs themselves.
To determine which type you have:
1. Look at your front hubs: If you see a lever or knob on each front hub, you have manual locking hubs. If there are no such controls, you likely have automatic hubs.
2. Check your owner's manual: This is the most reliable source of information.
3. Look underneath: If you can get under the truck safely, you can visually inspect the hubs for the mechanism.
If they're manual and not locking in:
* Check the hubs for damage: Look for any bent parts, broken levers, or stripped gears.
* Lubricate the hubs: Lack of lubrication is a common cause of failure.
* Inspect the linkage: Make sure the linkage connecting the hub lever to the hub itself is intact and functioning properly.
If they're automatic and not locking in:
This is more complex. It could be an issue with:
* The vacuum system (if applicable): Some automatic hubs use a vacuum system to engage. Check the vacuum lines for leaks or blockages.
* The actuator: The actuator itself may be faulty.
* The transfer case: A problem with the transfer case itself could prevent the hubs from engaging.
* Wiring (if applicable): Some automatic hubs have electrical components; check for faults in the wiring.
If you are having trouble with your hubs, a qualified mechanic will be able to diagnose and repair the issue. Improperly functioning 4WD hubs can be dangerous.
