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Old 09-12-2017, 09:09 AM   #1 (permalink)
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One Ton DoubleCab build

I'm gunna start this now and update it as parts and questions pile up. I wheeled a beat up leaf sprung 4runner for a couple years before wanting something more. Been eyeballing doublecab tacomas for a while and finally found one I wanted to jump on.



Had a set of gear drive duals sitting around from my last runner that got blown up at Fordyce







Some one tons I recently picked up for this project.



Chevy kingpin 60 4.56 gears with chromo shafts (4WU 3-link coming soon)

14bff rear 4.56 gears Detroit locker

I'm gunna try and take pictures of the whole process and have a picture heavy build thread because that's what everyone wants anyway.

First question right off the bat. How much if any of the floor needs to be removed for a 4speed atlas? I don't need a flatbelly and I wanna avoid cutting the floor to hell as much as possible. As of now my plan was yota duals mated to the auto but if your going all out why not run the atlas? Pretty much talk me out buying a 4speed atlas for this thing

Last edited by calcrawler; 10-02-2017 at 07:41 PM.
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Old 09-12-2017, 09:24 AM   #2 (permalink)
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If you don't clock it and leave the atlas hanging way down you can get away with hammering the floor. Other wide you'll be making a new tunnel like I did on my 3rd gen runner. Super easy though. Way worth it to be well above the frame rails
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Old 09-12-2017, 09:30 AM   #3 (permalink)
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Any pictures of it or any build thread associated?
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Old 09-12-2017, 10:49 AM   #4 (permalink)
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Just called inchworm to order a prerunner adapter and they are now discontinued. So it looks like a trans swap is in my future or at the minimum convert my trans to a 4wd. Is any 3.4 auto trans a bolt up or anything I need to look out for electrical wise?
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Old 09-12-2017, 11:49 AM   #5 (permalink)
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Glad they discountinued the prerunner adapter. Thing is a pain, the seal never holds so the tranny fluid leaks into the tcase constantly. Better off going a 2 speed atlas with like 4.3 or 3.8 gears with the auto.

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Old 09-12-2017, 01:36 PM   #6 (permalink)
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Just called inchworm to order a prerunner adapter and they are now discontinued. So it looks like a trans swap is in my future or at the minimum convert my trans to a 4wd. Is any 3.4 auto trans a bolt up or anything I need to look out for electrical wise?
A340F will bolt up, just make sure if you have an 03-04 double cab, you have an electronic kickdown cable and get the proper transmission (01-02 4runner or 03-04 Taco). 01-02 Tacomas have mechanical kick down cables. The swap is a bit easier with a mechanical and transmissions are cheaper and easier to find so hopefully you got lucky there I had to swap over the electronic harness deal on the passenger side of the trans from the old one to the 4wd one and get the right speed sensor for the t-case, extend the wires and it was done.
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Old 09-12-2017, 05:03 PM   #7 (permalink)
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A340F will bolt up, just make sure if you have an 03-04 double cab, you have an electronic kickdown cable and get the proper transmission (01-02 4runner or 03-04 Taco). 01-02 Tacomas have mechanical kick down cables. The swap is a bit easier with a mechanical and transmissions are cheaper and easier to find so hopefully you got lucky there I had to swap over the electronic harness deal on the passenger side of the trans from the old one to the 4wd one and get the right speed sensor for the t-case, extend the wires and it was done.

This is the info I'm lookin for! The truck is a 2003 so I'm assuming its going to be an electronic kick down cable I'm gunna crawl under and check it out. Finding the build on your Tacoma is what finally pushed me to start this build. If mine comes out half as sweet as yours ill be stoaked. I cant remember if your build thread has any info on steering shaft and abs delete but either way ill be stalking it throughout the build
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Old 09-12-2017, 05:09 PM   #8 (permalink)
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Looks like a hunk a junk. Should of got a Chevy loser
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Old 09-12-2017, 05:48 PM   #9 (permalink)
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Looks like a hunk a junk. Should of got a Chevy loser
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Old 09-12-2017, 08:18 PM   #10 (permalink)
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Subscribed. Get an atlas you know what our want too m
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Old 09-12-2017, 09:59 PM   #11 (permalink)
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This is the info I'm lookin for! The truck is a 2003 so I'm assuming its going to be an electronic kick down cable I'm gunna crawl under and check it out. Finding the build on your Tacoma is what finally pushed me to start this build. If mine comes out half as sweet as yours ill be stoaked. I cant remember if your build thread has any info on steering shaft and abs delete but either way ill be stalking it throughout the build
Yeah so you'll be on the hunt for an A340F from an 01-02 4runner or 03-04 Taco. Thanks! Steering shaft I used a Borgeson joint at both ends and a Borgeson slip shaft. The Borgeson joint at the steering wheel didn't fit so I cut their splines off and welded on the Toyota section. I like how the Toyota section clamps better anyway, its like a pinch bolt. And my truck didn't come with ABS
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Old 09-13-2017, 01:29 PM   #12 (permalink)
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Pretty straight forward write up on ABS delete:
https://www.tacomaworld.com/threads/...tacoma.377243/

I see your in OV. I'm tearing apart a 2wd Taco for the 2rz right now. Anything you want off if it let me know. I know the tranny had a mechanical kick down cable, but I think it's an A340E.
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Old 09-14-2017, 08:07 AM   #13 (permalink)
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Pretty straight forward write up on ABS delete:
https://www.tacomaworld.com/threads/...tacoma.377243/

I see your in OV. I'm tearing apart a 2wd Taco for the 2rz right now. Anything you want off if it let me know. I know the tranny had a mechanical kick down cable, but I think it's an A340E.
Thanks for that link! Pretty Straight forward. I can't think of anything I'd need off that truck at the moment. Thanks for the offer though!
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Old 09-14-2017, 06:05 PM   #14 (permalink)
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Go 10:1 atlas.... i mean it is a crawler right!?!?
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Old 10-02-2017, 07:44 PM   #15 (permalink)
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4WheelUnderground kit should be coming soon! Ill post plenty of pictures when it gets here. I think ive came to the conclusion that I'm going to run Toyota cases. I already have the makings to put them back together. But still if anyone has any pictures of a atlas mated to a Toyota auto id like to se it
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Old 10-04-2017, 04:46 PM   #16 (permalink)
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Got frame plates and the trail gear steering shaft kit from WFO today.

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Old 10-06-2017, 09:41 PM   #17 (permalink)
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Looking forward to following this build
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Old 10-06-2017, 10:38 PM   #18 (permalink)
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Cool, another Taco building right around the corner. Finally actually working on mine after letting it sit in the garage for about a year
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Old 10-13-2017, 10:02 PM   #19 (permalink)
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You'll need an a340f (or at least the tail shaft and tail housing for your A340e) if you plan on running the Toyota t-cases.

If your going Atlas, then an AW4 (or the tail shaft and tail housing) will bolt directly to the Atlas.
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Old 10-15-2017, 09:31 AM   #20 (permalink)
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You'll need an a340f (or at least the tail shaft and tail housing for your A340e) if you plan on running the Toyota t-cases.

If your going Atlas, then an AW4 (or the tail shaft and tail housing) will bolt directly to the Atlas.
I'm assuming the output on the trans needs to be changed as well. I know there is oil pan differences and stuff like that. I thought about converting mine but I'm hoping I can find a 4wd trans local. Last one I found was at a wrecker and they wanted $800 for a 180k trans.
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Old 10-17-2017, 09:40 PM   #21 (permalink)
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I'm assuming the output on the trans needs to be changed as well. I know there is oil pan differences and stuff like that. I thought about converting mine but I'm hoping I can find a 4wd trans local. Last one I found was at a wrecker and they wanted $800 for a 180k trans.
Yes and the trans will need to be fully disassembled to swap outputs. I cut down the shaft on my a340e and used an aw4 tailshaft housing to save money. When that trans went out I threw down the money for an overpriced a340f. But I never had issue with the cut down tailshaft
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Old 10-18-2017, 12:15 PM   #22 (permalink)
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The other option is to find an A340F and use the AA 50-5710 adapter and then bolt your Atlas up to it. That what I did when I swapped the auto in My 85. Might as well just do it one time. Sell your duals and apply it to an Atlas....
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Old 10-22-2017, 10:45 PM   #23 (permalink)
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Got 2.0 14" radflo coil overs and 3" radflo air bumps. I'm guessing the rest of the 4wu kit should be in soon. Still no luck with finding a cheap local trans, I'm thinking it might be easy to rebuild mine and covert it to 4wd. We'll see.




Last edited by calcrawler; 10-22-2017 at 10:46 PM.
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Old 10-24-2017, 09:26 PM   #24 (permalink)
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Im basically just starting the same build- mine is an '02 double cab prerunner. Just picked it up about a month ago.. I'm going with a HP60 front, 14 bolt rear and going to do links and coil overs. I'm thinking I might just run the Marlin duals , but not 100% sure.. I'm also still looking for a A340F locally. I'll definitely be following this post! Good luck with the build!
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Old 10-25-2017, 11:53 AM   #25 (permalink)
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Got 2.0 14" radflo coil overs and 3" radflo air bumps. I'm guessing the rest of the 4wu kit should be in soon. Still no luck with finding a cheap local trans, I'm thinking it might be easy to rebuild mine and covert it to 4wd. We'll see.
The *ONE* change I would make to my 4WU install - 90 degree connection for the reservoir on the shock body. I have Brian's shock mounts as well, and I think a 90 degree fitting on the body would make packaging things significantly easier.
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