Acro Quick-Change Rear Axle

The Acro quick-change rear end is designed with an open axle shaft of either high-strength aluminum or heat-treated steel. This axle is driven by a ring and pinion gear set mounted in a cast aluminum housing. The back section contains the quick-change gears. The housing may be located anywhere on the axle anywhere between the chassis carrier bearings according to your installation requirements.

A standard axle is 45" long, with the ring gear housing located 2" to the left of the axle center, so that 20¹⁄₂" of the axle is on the left and 24¹⁄₂" is on the right. As stated, special locations are available.

Change gears are located in the rear of the housing and are easily accessed by the removal of a cover plate. Many ratios are available using the same ring and pinion; see charts with each rear end.

3-Bolt Non-Shifting 6000 Series	4-Bolt Shifting 7000 Series	5-Bolt Shifting 8000 Series
(For use with in-out boxes)		All New

The lower shaft transmits power to the change gears at the rear of the housing. The cable-controlled internal shifter acts as an in-out clutch.

We can supply rear hubs with standard 4-bolt or 6-bolt patterns. Wheel centers are also available for splined axles. Several brake kits are available for easy bolt-on installation.

Rear end assemblies are available with a steel axle, keyed aluminum axle, or splined aluminum axle in sizes from 1¹⁄₄" to 1³⁄₄" diameter.

Conversion Kits for Rear End

Any Acro rear end can be converted to a different style, retaining many existing parts.

To convert from a steel axle to an aluminum axle: Includes aluminum axle, aluminum ring gear carrier, adjustable aluminum hubs, chassis carrier bearings, misc. hardware.

To convert from a 3-bolt center housing to a 4-bolt internal shifter: Includes center section, rear cap, lower shaft, shifting parts, misc. hardware.