If you decide to convert a non locking axle housing to a locking one here is the work your looking to have done.
Please note the following info is copied from Slee offroad web site.
Sleeoffroad.com - Toyota SUV Off-Road Outfitters
Retrofitting Toyota lockers into non-lockered housing
The question of retrofitting oem Toyota electric differential lockers to non-lockered axles come up quite a bit. On this page we would like to point out some of the things that need to be done. Yes, it can be done. Typically at shop rates, it is not cost effective. It doesn't mean it can't be done.
By far the easiest and cheapest way to do it, is to find donor axles from a truck to just swap into yours. You will also need the diff lock ecu, and various pieces or the electrical harness. If you locate a truck of the same vintage (ie, 1993-1004 or 1995-1997) it should be a simple plug and play option.
The harness from the switch position (to the left of the steering wheel) to the ecu position (in the right kick panel) is already installed. What is needed is rear harness from inside the left side rear quarter panel to the locker and the front harness. As well as the locker ecu.
Although the axles from all the years should interchange, the harnesses does not. You would also have to put the lights & sockets into the instrument cluster to make it light up.
If complete axle housings with third members are not available, then you can retrofit the third member. This ranks high on the banana scale, and should not be attempted without the right tools and knowledge.
Below is a photo of a front housing, showing the new holes that need to be drilled and the area that needs to be notched. As can be seen from the photo, it can be done, however the seal area is quite a bit smaller and can cause leaks in the future.
We will expand on this page as soon as we have more pictures available.
Front housing modified to accept electric locker third member
A metal plate is bolted to the third member mounting surface.
Next we use a portable magnetic drill press to drill corner holes on the notch.
Using an auger bit to form the corners of the notch.
Next we cut the notch between the two holes.
Some welded is added to the housing to increase the sealing area. This is ground smooth to provide a flat sealing surface for the third member.
The modification complate with the new holes drilled and tapped.
Please note the following info is copied from Slee offroad web site.
Sleeoffroad.com - Toyota SUV Off-Road Outfitters
Retrofitting Toyota lockers into non-lockered housing
The question of retrofitting oem Toyota electric differential lockers to non-lockered axles come up quite a bit. On this page we would like to point out some of the things that need to be done. Yes, it can be done. Typically at shop rates, it is not cost effective. It doesn't mean it can't be done.
By far the easiest and cheapest way to do it, is to find donor axles from a truck to just swap into yours. You will also need the diff lock ecu, and various pieces or the electrical harness. If you locate a truck of the same vintage (ie, 1993-1004 or 1995-1997) it should be a simple plug and play option.
The harness from the switch position (to the left of the steering wheel) to the ecu position (in the right kick panel) is already installed. What is needed is rear harness from inside the left side rear quarter panel to the locker and the front harness. As well as the locker ecu.
Although the axles from all the years should interchange, the harnesses does not. You would also have to put the lights & sockets into the instrument cluster to make it light up.
If complete axle housings with third members are not available, then you can retrofit the third member. This ranks high on the banana scale, and should not be attempted without the right tools and knowledge.
Below is a photo of a front housing, showing the new holes that need to be drilled and the area that needs to be notched. As can be seen from the photo, it can be done, however the seal area is quite a bit smaller and can cause leaks in the future.
We will expand on this page as soon as we have more pictures available.
Front housing modified to accept electric locker third member
A metal plate is bolted to the third member mounting surface.
Next we use a portable magnetic drill press to drill corner holes on the notch.
Using an auger bit to form the corners of the notch.
Next we cut the notch between the two holes.
Some welded is added to the housing to increase the sealing area. This is ground smooth to provide a flat sealing surface for the third member.
The modification complate with the new holes drilled and tapped.