Chevrolet 1998 Tracker Owner's Manual page 78

Manual
To lock or unlock the hubs, you must park your vehicle
(see "Shifting into PARK (P)" or "Parking Your
Vehicle" in the Index) and get out. To lock the hubs,
turn the hub dials to LOCK.
To unlock the hubs, turn the hub dials to FREE.
Automatic
With automatic freewheeling hubs, you don't have to get
out of the vehicle to lock or unlock the hubs.
Locking the Hubs
1. Stop your vehicle.
2. Shift the transfer case to FOUR-WHEEL HIGH
(4H) or FOUR-WHEEL LOW (4L).
3. Drive slowly forward and the hubs will lock.
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