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Factory 4.88 drop in?

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Old Jun 16, 2010 | 08:47 PM
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Factory 4.88 drop in?

I have factory 8" 4.10's right now. I'm in need of a re-gearing on my 93 4Runner 22RE, 5spd...

Will the factory 4.88's that came on other 2nd gen trucks and 4Runners swap right in to the front and rear diffs, plug and play? I'm planning on buying the entire 3rd members for both front and rear in hopes that I can swap them out for my 4.10's.

Anyone done this, what is your experience? Did they bolt right up and run well? I've read that most lockers won't work with them but I'm not concerned about that right now.

Thanks for your help!
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Old Jun 16, 2010 | 09:05 PM
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they drop right in... i have a set sitting in my garage waiting to be swapped into my truck.
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Old Jun 16, 2010 | 09:09 PM
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https://www.yotatech.com/forums/f116...osting-204178/


Under #3, it has write ups with pics so you can see what you are getting into with the swap. I swapped to 4.56's, and it was the best money I have spent on my rig for drivability sake. (The soft top was the best for coolness sake, I guess you could say)
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Old Jun 16, 2010 | 09:30 PM
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soo you can swap in a v6 3rd into a 4cyl ?
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Old Jun 16, 2010 | 09:34 PM
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Was that a serious question??
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Old Jun 16, 2010 | 09:41 PM
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ya it was i thought the v6 was bigger and wont work
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Old Jun 16, 2010 | 09:46 PM
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ok, I just couldn't tell sarcasm on here, you know.

If you are swapping ENTIRE thirds, they fit no problem. The difference in the 4 cyl and v6 is the pinion inside the ring gear. If you want use the 4 cyl pinion inside the v6 housing, etc, then you run into problems. The v6 has 4 pinions instead of 2 and is considered to be tougher, but if you leave it intact, the axle shafts (rear) and cv's (front) line up perfectly and you are off and rolling.

Wasn't trying to be an ass, but I wasn't going to type all that out if you were joking. LOL!
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Old Jun 16, 2010 | 09:47 PM
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ahh i see
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Old Jun 17, 2010 | 07:28 PM
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Thanks for the information guys... Now comes the task of finding the actual 3rd members. Hopefully I can find a set from the same truck.

Is it a problem if the front and rear 3rds are from different trucks? I don't see why it would be, just double checking.
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Old Jun 17, 2010 | 07:47 PM
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Doesn't matter. I got mine from different rigs.

I just saw a set on the seattle craigslist for $400. Good luck.


I just looked. They are in Ranier, WA. Kind of a drive.

Last edited by kiyobrown; Jun 17, 2010 at 08:01 PM.
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Old Jun 17, 2010 | 08:02 PM
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Originally Posted by kiyobrown
Doesn't matter. I got mine from different rigs.

I just saw a set on the seattle craigslist for $400. Good luck.
I just found that ad and emailed the seller, thanks for the lead!
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Old Jun 17, 2010 | 08:02 PM
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No problem.
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Old Jun 17, 2010 | 08:03 PM
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Originally Posted by kiyobrown
No problem.
Yeah it's about a 2 hours drive - much better than paying for shipping.
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Old Jun 17, 2010 | 08:09 PM
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Thats better then what I did. I found the rear third in Snoqualmie, then the front in Bellingham.


And funny, I went with Truckfiend to grab his 4.88's in Yelm, about 5 minutes from Ranier. Maybe they collect them there?
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Old Jun 17, 2010 | 08:12 PM
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Originally Posted by kiyobrown
Maybe they collect them there?
Hahaha, maybe so.

I hope this guy comes through, I'd love to get them from the same place and get it over with.

Anyways, how was the install for you, and how do you like them? What size tires are you running?
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Old Jun 17, 2010 | 08:54 PM
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One more question - does the front IFS 3rd have to be an ADD 3rd? Or can I swap in my original left side axle (the extended one) into a non-ADD 3rd.

My truck is ADD.
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Old Jun 17, 2010 | 09:23 PM
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Do you know what those thirds came out of? Chances are it has ADD.

Some folks use their non ADD axle tube to get rid off ADD, I don't see why you couldn't do it in reverse.

I didn't have to deal with any of the ADD stuff on mine. And we just bypassed truckfiends by running a vacuum line to on side and a cap on the other, since he has an 87 pickup and had manual hubs.
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Old Jun 17, 2010 | 09:37 PM
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Originally Posted by kiyobrown
Do you know what those thirds came out of? Chances are it has ADD.

Some folks use their non ADD axle tube to get rid off ADD, I don't see why you couldn't do it in reverse.

I didn't have to deal with any of the ADD stuff on mine. And we just bypassed truckfiends by running a vacuum line to on side and a cap on the other, since he has an 87 pickup and had manual hubs.

Ok. Manual hubs are on my list as well.

BTW, that guy got back to me. $300 for the set, going to get them this weekend. I owe you a beer
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Old Jun 17, 2010 | 09:47 PM
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$300? That's a good deal!! I'll always take a beer!!

You could pick those up and keep driving to Evans Creek. A bunch of us will be out there this weekend. I am bringing beers.



Btw, the 3rd section in there has pic by pic swaps of entire thirds. Should help you out when you do your swap.

https://www.yotatech.com/forums/f116...osting-204178/


edit* Just found this pic. The non ADD Diff doesn't have the spot where the actuator fork attaches to. But again, I haven't done it so don't quote me on it.


Missing this....

Last edited by kiyobrown; Jun 17, 2010 at 09:57 PM.
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Old Jun 17, 2010 | 10:10 PM
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I was just reading that thread... great pics. Shouldn't be too hard to pull off on a weekend.

I'll be running them on 31x10.50's for at least a couple weeks before I go to 33x12.50's. Shouldn't be a big deal?

How far up is Evans Creek?
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