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Modified 2002 - 2005 Explorers Questions related to modified 2002 - 2005 Explorers and Mountaineers. For Sport Trac and Sport models use the 1995-2001 forum. Aftermarket accessories and modifications. Bullbar, running boards, floor mats, cargo mat, DVD headrest, wheels, tires, stereo upgrade, headlights, mud flaps, lift kits, engine swap, transmission swap.

Spartan Locker

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Old 04-08-2012, 12:38 PM   #1
skysthelymyt
Florence, SC
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Spartan Locker

Well, after reading a lot of threads about different lockers I decided to go with a US Standard Gear Spartan Locker. Like any lunchbox style locker, it goes in the place of the spider gears. The install of the locker was very easy. I used the thread http://www.explorerforum.com/forums/...d.php?t=318076 to help during install.
The locker came in a nice box.







It came with a set of instructions on how to install the locker inside the open carrier. The Spartan Locker DID NOT have to be modified in any way to fit the ford 8.8 IRS. The axle spacers had the correct inside diameter.





Not the best way to measure the inside diameter but hey, it worked.
Getting the diff out wasn't all that hard. I had a buddy with me helping getting it out.

I cleaned the inside of the diff with break cleaner (not perfect) but I got the major stuff off.



Btw, the tolerance for the Spartan Locker is between .145-.170 inches. That was measured with feeler gauges. Do not use thrust washers for this locker. It specifically states not to use them. So make sure you get them out when you remove the spider gears.
After install:



After you get everything back together, go have some fun!!!







It works excellent. NO problems. I don't hardly hear it on the road. You can hear it when making sharp turns in a parking lot. I used Lucas 85w-140 gear oil. And if you have a noisy rear end, this gear oil will help lessen that noise. It is about 10$ a bottle and you need to get two. (Ford manual says to put 1.7 quarts in rear axle)

Any questions, feel free to ask.




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Old 04-08-2012, 02:23 PM   #2
Wills05xlt4x4
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Great write up. Can't wait to regear and lock mine this summer




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Old 04-08-2012, 03:18 PM   #3
Ronin8002
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Nice work and great writeup. The 8.8 Spartan came out a while after i did the aussi so i wondered how it might have worked. Glad to see it's a direct fit. Hope you make good use of the added traction!




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Old 04-08-2012, 03:20 PM   #4
Blee1099
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One good thing about the Spartan is that its made by Yukon gears and it has a hardened shaft already..
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Old 04-08-2012, 05:18 PM   #5
rangermidtn
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Nice! How much did it cost?




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Old 04-08-2012, 06:29 PM   #6
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I've seen them just under 300... Cheapest locker I've seen....and made by Yukon!

http://www.google.com/search?q=8.8+s...iw=615&bih=369




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Old 04-08-2012, 06:48 PM   #7
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Originally Posted by Wills05xlt4x4 View Post
I've seen them just under 300... Cheapest locker I've seen....and made by Yukon!

http://www.google.com/search?q=8.8+s...iw=615&bih=369
That's what I have been seeing too. I guess I've found something else for the Explorer.




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Old 04-08-2012, 10:32 PM   #8
skysthelymyt
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Yes, I paid $288 w/ shipping. It's made by Yukon and comes with a hardened cross shaft pin. It doesn't say anything about it fitting the 8.8 IRS but it did perfectly. The way they set up the locker with the springs and pins was a very good idea.
http://www.ringpinion.com/Content/Ho...structions.pdf
That's the manual on how to put the locker together.




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Old 04-09-2012, 08:48 AM   #9
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Great deal! This is exactly what the 3rd gens need. With a super rigid frame and IRS it rlly doesn't take much to lift a wheel even with the sway bars disconnected.




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Old 04-09-2012, 08:52 AM   #10
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I've updated the Aussie Locker install thread in the stickies to mention that the Spartan locker is a direct fit install. Hopefully that will encourage more people to start doing this now.




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Old 04-09-2012, 12:47 PM   #11
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Should it still be a direct fit if I do a 4.10 or 4.56 swap?

Still trying to understand how gearing works.
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Old 04-09-2012, 12:53 PM   #12
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Should it still be a direct fit if I do a 4.10 or 4.56 swap?

Still trying to understand how gearing works.
Yep. The ring and pinion gears change but the carrier and CV axles stay the same. Since those two things (carrier/axles) are the factors that affect fitment for our diffs then you should not have any issue fitting the locker when you do a gear swap.

However, with 4.56 gears you will probably have to grind the edge off one of the ring gear teeth to allow the cross pin to be inserted into the carrier. As I understand it, this is done frequently with all the higher ratio gears and it has no impact on anything.




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Old 04-09-2012, 02:20 PM   #13
skysthelymyt
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Originally Posted by Ronin8002 View Post
I've updated the Aussie Locker install thread in the stickies to mention that the Spartan locker is a direct fit install. Hopefully that will encourage more people to start doing this now.
Thanks.
I hope so too.




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BTF (2/1.5) spacers
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Old 04-09-2012, 02:24 PM   #14
Wills05xlt4x4
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Originally Posted by Ronin8002 View Post
Yep. The ring and pinion gears change but the carrier and CV axles stay the same. Since those two things (carrier/axles) are the factors that affect fitment for our diffs then you should not have any issue fitting the locker when you do a gear swap.

However, with 4.56 gears you will probably have to grind the edge off one of the ring gear teeth to allow the cross pin to be inserted into the carrier. As I understand it, this is done frequently with all the higher ratio gears and it has no impact on anything.
That is something that would void a warranty without a noched pin... Even though they are weaker...
Im going 4.56 and I'm most likely get the noched pin allthough they don't have but a yr or so warranty on the ring and pinion...




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Old 04-09-2012, 02:48 PM   #15
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That is something that would void a warranty without a noched pin... Even though they are weaker...
Im going 4.56 and I'm most likely get the noched pin allthough they don't have but a yr or so warranty on the ring and pinion...
I don't much about the full carrier lockers like the Ox, but I would think that with the way they work there would be less of a problem running a notched pin than with a lunchbox...maybe the stress on the pin is the same between the two types though...don't know.

Didn't think about the warranty thing, good point.




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Old 04-09-2012, 03:39 PM   #16
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I ordered mine today! Can not wait to get it.




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Old 04-09-2012, 03:59 PM   #17
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Originally Posted by Ronin8002 View Post
I don't much about the full carrier lockers like the Ox, but I would think that with the way they work there would be less of a problem running a notched pin than with a lunchbox...maybe the stress on the pin is the same between the two types though...don't know.

Didn't think about the warranty thing, good point.
actually after looking at some pics it looks like all the full case lockers just bolt right to the ring gear, there's no cross pin because it that kind doesn't need one.

So I guess the whole notched cross pin thing vs notching the gear tooth doesn't really come into play unless you're doing a lunchbox locker or spider gears




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Old 04-09-2012, 04:00 PM   #18
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I ordered mine today! Can not wait to get it.
sweet!




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Old 04-09-2012, 09:18 PM   #19
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This is AWESOME!!!
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Old 04-09-2012, 10:27 PM   #20
skysthelymyt
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I ordered mine today! Can not wait to get it.
It's awesome. I have enjoyed having it so far this week. I can't hear it with the radio on. With the windows down and radio off while in a tight turn I can hear it barely. If you are very light on the pedal from a stop into a turn, it will unlock and won't make any noticeable noise. It was worth every penny in my opinion.




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