Mack’s new C150/151 rear axle carriers offer improved ratios for highway and vocational applications — running from 3.11:1 to 5.66:1 — and they’re said to be lighter, stronger, and stiffer than previous designs. They retain Mack’s traditional top-load, dual-reduction design. 

The top-loaded carrier – where the driveshaft connects to the carrier above the axle – results in near-zero driveline angles, says Mack, which minimizes noise, vibration and harmonics. Potential oil-leak paths are reduced since the carrier joint is on the horizontal plane, above the level of the oil reservoir. Dual reduction reduces gear-face friction and related parasitic losses, component stress and excess heat, said to increase overall component life.

The Mack patented automatic power divider remains a standard feature, with optional lockout and differential locking systems. The new carriers are compatible with all suspensions offered by Mack.