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Unread 02-03-2012, 08:06 PM   #1
Fire931
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Default FJ Elocker retrofit into 4th gen 4Runner

So my second hand around the shop (lexmedic157) acquired an 08 FJ elocker third complete with the motor for a good deal after I told him I would help with the retrofit. So we finally got around to installing it into his 07 4Runner the other day. Turned out real well and was surprisingly easy to fit into his axle housing.

I started by reading all kinds of threads about doing the retrofit on the older Tacomas and 3rd gen 4Runners to get an idea of what we were in for. Turns out with the 4th gens there's no welding involved. Only took a bit of grinding and drilling/tapping out 4 holes and it was ready to go.

We choose to pull the entire axle out of the truck to make the modifications easier. You could probably do it with the housing still installed if you really wanted to though.

Tools needed once the 3rd is out:

grinder (I used one with a flap disk on it)
17/64 drill bit
M8 x 1.25 tap

Parts needed:
Elocker 3rd
Elocker gasket (used to marking for the modifications)
2 of the long mounting studs


The easiest way to see what needs to be modified is to have an elocker gasket on hand. Lay it down on the axle and trace out the notch for the shift fork and mark the 4 holes that need to be drilled.



Then do your grinding and drill/tap out the holes, just make sure the holes are straight or you'll have a hard time getting the 3rd to drop down over the studs.



If you look close you can see in the above picture where we not only notched the opening for the locker fork and drilled the new holes but we also had to knock down a small little bit at the top right, it was raised up just a touch from the mounting face so I just hit it real quick with the flap disk to bring it down.
Then put everything back together!

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Unread 02-03-2012, 08:45 PM   #2
java230
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Nice! Just like the older models.
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Unread 02-04-2012, 01:17 AM   #3
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Nice swap out. Had a chance to try it out to make sure it funstions OK?
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Unread 02-04-2012, 02:58 AM   #4
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Not in the dirt, but yup works like a charm.
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Unread 02-04-2012, 09:52 AM   #5
Robinhood4x4
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Awesome. Nice to see people doing this mod on the 4th gens now and even better to see it being documented.
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Unread 02-04-2012, 07:12 PM   #6
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Can you explain what benefit this mod does regarding 4x4ing? Curious is all
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Unread 02-04-2012, 07:37 PM   #7
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Prevents wheel spin should the pressure off of one of the rear tires unload. Wouldn't be much use for on road or flat stuff but over rocks it's useful.
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Unread 02-04-2012, 10:41 PM   #8
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Last edited by HBmurphy; 02-08-2012 at 03:38 PM.
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Unread 02-05-2012, 07:13 AM   #9
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Quote:
Originally Posted by HBmurphy View Post
This reminds me. Do you need a 3, 4 or 5 bedroom?!
Lol... 3.
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Unread 02-05-2012, 06:37 PM   #10
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Nice. Looks fairly straightforward.
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Unread 02-05-2012, 06:51 PM   #11
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Hardest part was the parking brakes
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Unread 02-05-2012, 08:22 PM   #12
AggieFCO
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So is this mod cheaper than buying an ARB locker and pump?
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Unread 02-05-2012, 08:26 PM   #13
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Considerably...

However it's totally dependent on how cheap you can pick up an elocker 3rd for.
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Unread 02-05-2012, 08:46 PM   #14
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Quote:
Originally Posted by lexmedic157 View Post
Hardest part was the parking brakes
Is that because you pulled the complete rear off the truck and had to disconnect and reconnect the Ebrake cables?
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Unread 02-05-2012, 08:49 PM   #15
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I think it's a combo of never having done it before and not having the tools that the dealership might have. Kevin has drum brake tools but the axle blocked effective usage if them.
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Unread 02-05-2012, 09:15 PM   #16
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What gears are the FJ thirds?
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Unread 02-05-2012, 09:17 PM   #17
lexmedic157
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Well the one I got was 3.73 which was what was already in mine.
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Unread 02-05-2012, 09:17 PM   #18
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How did the wiring work? Did you have to run new wires, new fuse and factory FJ switch? Looks awesome
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Unread 02-05-2012, 09:22 PM   #19
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I did have to run new wires. Got 6 conductor cable from etrailer. It's fused to a fuse block I did on a previous install for cb, ham radio, etc. And put a Carling switch in. I think I'm up to around 5 of them now.
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Unread 02-06-2012, 02:42 AM   #20
zimcruza
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Is there an ECU that you had to put in? And wiring loom? I have the OEM eLocker unit sitting in my garage waiting to swap out my standard open diff. It's from the same year model as mine so don't anticipate too many issues - except for figuring how to get actuator to fire and then release to engage / disengage the diff lock. What route did you take for this??

Cheers
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