LEVEL CHECK

The fluid level should be checked every six months or 60,000 miles (96,000 km), whichever comes first.

1. Park the truck on a level surface, turn the engine OFF, FIRMLY apply the parking brake and block the drive wheels.

   NOTE: Ground clearance may make access to the transmission filler plug impossible without raising and supporting the vehicle, BUT, if this is done, the truck MUST be supported at four corners and level. If only the front or rear is supported, an improper fluid level will be indicated. If you are going to place the truck on four jackstands, this might be the perfect opportunity to rotate the tires as well.

2. Remove the filler plug from the side of the transmission case using a ³⁄₈ in. drive ratchet and extension. The fluid level should be even with the bottom of the filler hole.
3. If additional fluid is necessary, add it through the filler hole using a siphon pump or squeeze bottle.
4. When you are finished, carefully install the filler plug, but DO NOT overtighten it and damage the housing.