Express 2500 V8-6.0L (2008)
Fluid - Differential: Capacity Specifications
DIFFERENTIAL FLUID
8.6 INCH REAR AXLE
The lubricant level should be between 0-10 mm (0-0.4 in) below the fill plug opening.
If the measurement is greater than 10 mm (0.4 in), add lubricant until the level is between 0-10 mm (0.0-0.4 in) from the bottom edge of the fill plug
hole.
9.75, 10.5 INCH REAR AXLE
The lubricant level should be between 0-6 mm (0-0.25 in) below the fill plug opening.
If the level is low, add lubricant until the level is even with the bottom edge of the fill plug opening.
NOTE: All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck fluid level after filling.