ELocker Installation


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Like other manually selected lockers (OEM cable and electric and aftermarket air) are easy to set up and install by a competent technician. There are four basic steps in the installation process:

1. Disconnect axle shafts and remove differential carrier from axle housing.

2. Remove old differential from carrier, set up the gears on the new diff and reassemble the carrier.

3. Install carrier in axle housing (drill hole for wiring grommet) and reconnect axle.

4. Run the wiring from the locker pigtail at the axle to the switch location on dash or console. Provide a 12 volt power source and wire up the switch. For 24 volt rigs, a converter can be used to provide a 12 volt source - just like a stereo install.


There are three basic options:

1. Full shop install at a competent establishment that knows how to set up differential gears - usually a speciality axle shop or an offroad shop that knows locking differentials.

2. Do it yourself (DIY) at home or with a friend. Most of the work to be done only requires the skills of a decent backyard mechanic. The exception to that involves the pressing of bearings and setting up the ring/pinion gears for proper function and a long service life. If you are not experienced in these areas, we suggest that you not attempt this portion of the installation. Bad things can happen.....

3. A hybrid solution if you have access to an axle shop that will take your carrier and elocker and do the gear set-up and assembly for you. You do the carrier removal and installation, along with wiring - and the gear shop does the carrier set-up.

One option is Ken Francisco, a specialist gear shop in Arizona (www.gearinstalls.com) will set up your locker for a fair price, using Fed Ex to ship your carrier. 

We have worked with a number of other shops around the country. Among those who have done Harrop installations: Torfab (Everett, WA), Land Cruisers NW (Portland, OR), Valley Hybrids (Stockton, CA), Slee Offroad (Golden, CO), Forge Specialties (Fredericksburg, VA), East Coast Gear Supply (Raleigh, NC).

We are adding partner firms all the time, so give us a call if you are looking for a shop or if you are a shop that would like to work with us.



Prices vary by vehicle, solid vs. IFS (independant front suspension), complexity of vehicle and other variables.A decent rule of thumb in our experience is that half of the effort and cost deals with carrier set-up (gers and locker) and half deals with axle disassembly/assembly and wiring. 

The lockers and installation generally cost more for IFS axle lockers than solid axle lockers. The IFS front ends are more complicated and time-consuming.


Also a good time to consider regearing if that might be on your  to do list.We do not sell gears but your installer can set you up if you would like to change your gearing. Now is the time to re-gear!

A10994 is suitable for installation in vehicles with differential gear ratio of 3.73 to 1 and “higher.” For example, when the ring and pinion gear set is lower numerically, but that produce a “higher” final drive ratio, such as 3.5 to 1, 3.2:1, etc. These ratios are suitable for highway use, low rev/high fuel economy and limited towing or hauling.
A11110 is suitable for installation in vehicles with differential gear ratio of 3.92 to 1 and “lower.” For example, when ring and pinion gear sets is higher numerically, but that produce a “lower” final drive ratio, such as 4.11, 4.56, 4.88 or 5.29:1
Most aftermarket ring and pinion sets with these “lower ratio” (higher numerical) ratios such as 5.33 to 1 are used for owners that want more towing, hauling or crawling power at a given engine speed. Those gear sets typically have thinner ring gears than the “higher ratio (lower numerically) gear sets. As a result, in those cases, the correct Harrop for your use is A11110, which has a mounting deck that accommodates the thinner, “lower ratio” ring gear (see photo below).