CHEAP Transfercase Mod!! Jeep T-case In A Chevy. OnX Offroad Build Challenge Part: 6

We have shown you how to rebuild NP 231 transfer cases before but we haven't shown you that you can double them up to get the cheapest low range gear set of any t-case. At the time of this video the doubler kit cost $485 and the install isn't very challenging. This DIY video should make your gears spin.
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Like this video? Check out these:
ONX Build Challenge Part 1: • The Vehicle You Never ...
ONX Build Challenge Part 2: • Did we BUY THE RIGHT T...
ONX Build Challenge Part 3: • How To Build A Junkyar...
ONX Build Challenge Part 4: • Jeep Suspension On A C...
ONX Build Challenge Part 5: • Steering and Wheel SEC...
*ONX Build Challenge Part 6: • CHEAP Transfercase Mod...
ONX Build Challenge Part 7: • IT ROLLS!!!! Rear Susp...
ONX Build Challenge Part 8: • Matt Shows Up to Help ...
ONX Build Challenge Part 9: • HELP!!! It's Going Ou...
ONX Build Challenge Part 10: • Just Call Me Bob! How-...
ONX Build Challenge Part 11: • Bend & Flex. We Build...
ONX Build Challenge Part 12: • Is This The End Of The...
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This product is meant for entertainment purposes only. Your mileage may vary. Do not try this at home. Void where prohibited. Some assembly required. For off-road use only. Slippery when wet. Batteries not included. Do not use while operating a motor vehicle, heavy equipment, cherokee XJ, wrangler TJ, wrangler JK, or any Jeep vehicle, especially the newer Fiat ones. How-to videos may be too intense for some viewers and children under 30 years of age. Please remain seated until the 4x4 ride has come to a complete stop. Studies have shown viewing these videos causes increased cancer risks in laboratory test people. I am not a professional, I have no training, I'm not even particularly good at horse whispering. Don't believe everything that you know. Please keep your hands in the vehicle at all times. Do not tap on glass. Do not eat anything that has been on the floor for more than 3 days. Keep your hands to yourself. Not to be taken internally. Reproduction strictly prohibited. Driver does not carry cash. Objects in Bleepinjeep mirrors may be farther than they appear.

[@rusallen7]

Best off-road content on the internet. I feel like this was a video version of an old pirate 4x4 thread. Don’t ever stop.

[@jackc6299]

Your knowledge of all these old school/alternative/pirate way to make an offroader is impressive! I cant wait to see how this S10 performs. I watch Rudy and Holly and they seem like they are winging it. But axles and suspension might be all that Ram needs. The Dumpster Fire guy is doing a lot of body work, and relying on mostly stock running gear. Great work!

[@jimsdimideas5383]

Thank you for taking the time to explain your thought process with the shackle reversal scenario for the YJ front springs

[@colbysheppard3682]

Really love the cheap Jeep/ off-road stuff! Learning a ton and good to see ways to keep it cheap! Your knowledge of 4x4 stuff is immense! Keep it up Colt love the channel so much

[@rickbown6871]

Thank you Colt for this step by step how to. You really bring great content to Bleepin Jeep!

[@richardnichols1532]

That was awesome. The 4 pinion planetary already has the holes, you could make your own 6. It was a fun project for me and my son.

[@AndrewAMartin]

It looked like the carrier was the same for all 3 configurations -- makes sense.

[@richardnichols1532]

@Andrew Martin there's a how to video. It was intimidating at first but we successfully made a 3 pinion into a pinion🤘💪

[@thisisatest2576]

Just a suggestion - put the 6-pinion planet in the rear 231J t-case - it can see 2.72x the torque that it normally would from the output of the front doubler when the front doubler section is in low. The front doubler should be fine with the OE planet gears as it should be designed to hold the torque output of the 4.3L-700R4. Not that putting a 6 pinon planet in the front doubler is a bad idea but if you are on a budget and only have access to (1) 6-pinion planet set... If you need extra 6 pinion planet sets, NP241C/243C cases are a good source and cheap at a u-pull if you pull the gears out of it at the yard... If you are into the 231J rear case you can upgrade the chain and drive gears to the wider chain and drive gears found in NP231D (Dodge truck) t-cases.

[@KC-7mm]

Would it be just as easy to run the dodge 231 t case and the source a 6 gear planetary to put your stock 231 in front of it or is it not compatible im just curious you seem to have knowledge and I’m trying to learn. I might be doing something similar soon on a build

[@thisisatest2576]

@@KC-7mm The 231D has a few advantages over the 231J: It has the wide chain and sprockets (same width as the 241/243 cases, 1-1/4" width vs. 1" on the 231J IIRC), the two 231Ds that I have had apart also used a double roller bearing on the input gear. I've had several 231Js apart and you only get the single roller bearing on the input gear. The 231D also has a 32 spline slip yoke for the rear output, the 231J is 27spline? slip yoke OEM. Maybe not as important as a slip yoke eliminator is the better option than retaining the slip yoke, but if your on a budget... The 231Ds I've had apart also have steel retainer for the spring loaded shift rail that rests on the back half of the case, this prevents the spring from eating into the back case half over time, haven't seen this feature in the 231J. Makes sense, a fullsize 1/2 ton truck that came with a 5.9L V8 probably needs a heavier duty tcase than a 4.0L Cherokee... When swapping in a 6-pinion planet gear from say a 241/243C keep in mind that sometime in '94 (I think) the sun, planet and ring gear cut was changed so that the gear tooth profile was less square and more "pointy". So use a 6-pinion planet from a year range that matches your 231. The old vs. new gear cuts will physically assemble if mixed but it will make bunch of metal shavings in your case and probably ruin it. There are different length input gear stickouts as well, don't remember all the details now... 231J 23 spline input gears varied based on whether the tcase was behind an AX15, NV3550 and the AW automatic, there may be other variations as well. Not sure if the 231D cases used different length 23 spline input gears, but I ran a 231D input gear in a 231J behind an AX15, then changed it to the longer 23 spline input gear when I moved to an NV3550 (took the input gear from the donor Liberty 231J) in the Comanche I used to have.

[@darrenchamp8832]

Don’t forget you also get a 2wd single low option with this setup! Awesome stuff!

[@dirtyfingersgarage]

Great video Colt. I have to take apart my 231 and some of the pointers you show help even the more skilled tech's Cheers and good luck in the challenge.

[@sherylryan7038]

Probably one of the best technical demo I have watched excellent 👍 👌 👏 😀 😎 🙌 from Australia 🇦🇺

[@theslab6441]

This was the best episode so far. Very interesting and a product that most of us are considering on a Bucket List 4x4

[@timoldenburg2249]

You seem like such a chill guy, love your attitude 👍🤘

[@treywilliams755]

Colt just wanted to say you are without a doubt one of the best teachers on KZbin. Legit MVP of bleepinjeep i always learn something watching you build.

[@bleepinjeep]

Thank you Trey!

[@thephilosopher13]

Watching you move the welder off the trailer… “oh, 4 wheels and stuck? Rock it!” 😂 solid. 💯

[@jamescarroll1224]

Yes on the Tig welding lesson..

[@1a1u0g9t4s2u]

Without a doubt learning more about the T-case than I will ever use. Glad you are doing this. Thanks for sharing.

[@northpeak4x4]

Good old D and D machine. They were hard to get a hold of. But my doubler I bought in 2006 is still going strong in my Ford Ranger.

[@userANAKIN]

Hearing all the bad customer service stories kept me away for so long. Now that D&D has a new owner I might just give them a shot.

[@jefferyhuffman8282]

Yes on tig welding lessons and great video!

[@marklowe330]

I bought and installed the D&D kit 12 years ago. Great upgrade for my XJ. 4.0, auto, dual 231's, front 3 link, rear 4 link, 60's, 5.13's, locked, with 40's. High steer with hydro assist. Front and rear 8000 lb winches.

[@cadilakisrodcustom]

Thank you Colt for keeping this channel alive.. the content here is wonderful! I've done a bunch of mods to my xj that I learned here.

[@cameron339]

Colt, as a fellow South Dakotan thanks for creating all this great content! I love seeing the Black Hills in the background of your videos!

[@autotek7930]

I didn't even make it past the ads before I liked the video. Good morning ya'll

[@bleepinjeep]

Awesome thanks!!

[@jonaathansimons7938]

'89 XJ 4.0L, manual shift AW4 with Box4Rox 231/231 doubler...love the 2wd lo, & double lo/1st gear is 94:1 thru 4.56 finals! Good to see this being done again. I did add 6 pinion planetary & wide chain (231C) to *rear case* since the torque is tripled to it. Put 4 pinion in front range box. Been runnin' it for years. Do wish I had the sight glass your kit from Froelich came with. JBFab provided my twinsticks (years b4 Josh's WJ!) Wavin' atcha from nearby 57701

[@marklowe330]

I did the 231 doubler 12 years ago, and run XJ 4.0, auto, 5.13 locked 60's. Also 3 link front, 4 link rear with 40's. Crawls and climbs like boss. It's a hell of an upgrade.

[@alanmohn4146]

Your videos are the most informative out there. Great Job.

[@DuanDao]

I dont even own a JEEP (own a 100 series LC) but really enjoy the explanation that you do that makes this pleb understand.

[@robink2563]

Great information and I love that you showed the build.

[@dezfan]

Your videos are always so informative and I really enjoy watching them. 😎

[@BPDRacing1]

So rad! I am new to Jeeps and 4 wheelin' but not new to the wrenching scene by any means. I love seeing cool ways to use stock stuff and save a bundle while having a blast. Thanks Colt

[@sickjohnson]

That was super cool Colt!

[@snowfreak207]

The way you explain everything is great man. Got me on marketplace looking for something to build on the cheap.

[@Crewsy]

So does the fact that he sold you an old TIG welder mean the same as he doesn’t want you to come around anymore? 😉 Loved this episode. Definitely more of a how to than a let’s see if this works type of build. 👍🏻👍🏻👍🏻

[@bennelson3724]

Your content is so inspiring to beginner builders. Thanks for all the knowledge and keep it up!

[@King_Bob_The_Third]

I think your friend got fed up with you coming around using his stuff so he sold you a welder. 🤣🤣🤣 And each time I see those wheels you painted they look like they were anodised, really nice job. Really looking forward to seeing the finished product and I am sure that you are to.

[@granitesand78]

So cool. I’ve never seen that before. I love all the tricks you’re using to really make a true unique rig

[@GetCampingOz]

Thanks Colt! Really well explained on how the doubler works! Such an awesome mod!

[@craigclark3279]

I really like these lessons you give. It's going to be put to good use. Thanks again.

[@abnpthfdr2934]

This double transfer case build was both unexpected and awesome!!! I've seen them in use, but I've never seen it built from beginning to end like we did here. Thanks!!!🤙

[@CounterproductiveproductionDIY]

I love the 231 doubler. Your work proved it self on OnX challenge. Thank you for the off road education. I like to think of you as Einstein from the south. 👍👍👍👍👍👍

[@jokerzwildpowers385]

Thanks for the info truly enjoy watching your stuff and learning new things

[@mclarenscca]

Learned a lot in this video! Who'da thunk you could make a double out of another T-case.

[@samwalker3441]

Very informative. Thanks for posting, Colt.

[@pomnichowski]

so worth the viewing... thnx, looking to see what comes next...

[@larryflanigan2761]

great break down on how-to 241 doubler plus the S-10 is amazing project, Thank You

[@vavendano2000]

awesome. Ive wanted a 231/231 doubler for years now......and now that in building my lj I definitely need one now.

[@mh-qq2hj]

Colt, I’ve learned a lot from your videos! Thank you for sharing your experience!

[@mendallhaynes7340]

Yes do a video on Tig welding .

[@oneshotpete6.591]

you sir are the man !!!

[@muddiver91]

Love the channel, yes please on the tig video.

[@jaystax8370]

That was awesome! I had never seen that process before. Thank you!

[@rainwatercold1507]

I really enjoyed this video ❤

[@ggalland1]

Really cool video Colt! Awesome detail in your explanations! Can't wait to see this S-10 on the road/trail

[@Blackcloud_Garage]

Good stuff. I love seeing this kind of second hand, blue collar project.

[@coreydemarce4652]

Great tip on pressure testing, thank you for sharing that. Keep up the awesome videos!

[@JamisonOutdoorAdventures]

Thanks for the design explanations! Learning a lot watching your videos, that’s why I ask about the shackle orientation, I just wanted to learn. My vote is for bleepinJeep!

[@garychaiken808]

Ingenious your a wealth of knowledge and information. Thank you 😊

[@macattack1392]

Wow colt! Thanks for the info. Never thought of the "pressure test" just blowing behind the area. I figured to run a small bead of gasket maker on inside to really make sure.

[@fogstain]

This is a good one ,bud. Getting better all the time!

[@maryannherrschaft8842]

Thanks I've been thinking about this for awhile.

[@j.j.clingman4083]

Awesome video Colt!!! Heck I didn’t even know that they made doublers for anything other then the 205/203 doublers!!! That is definitely good to know!!!! Remember to keep up all the hard work buddy!!!!

[@tonyb2086]

Cool show! great info there Bleepin' Jeep is going to be a contender for sure👍

[@humech]

I'm looking to do this with ranger bw1350/1354 but really glad to have this info in video form too! Build is in my head anyway so far lol, not in a hurry i have a '23 bronco lol

[@redfred9913]

Great training video, thanks.

[@joeym2675]

Thanks for all the detailed information about this process!!! Really enjoying this build and all the cheap but Awesome upgrades your doing!!! Great Job!

[@bleepinjeep]

Thank you Joey!

[@driver-xx2pl]

I enjoyed it all, thanks much.

[@farreltucker7466]

Sweet, I`ve always wondered about that but had no idea that someone was making this stuff. Lots of good info, THANKS !

[@danbenjamin9917]

Great video Colt!

[@ITSNOTMEITISYOU]

Great content appreciate you taking your time and explaining everything. Using this on a 241/241c behind a 4l80e in my Comanche. And have a Happy New Year!

[@bleepinjeep]

Glad to help

[@thelonewrangler1008]

Thatnks for the dana 300 info becaise i was watching you do this mod saying how great and affordable it was while remembering that i have a TJ with 3" drive shaft😂

[@anthonyvirgadamo898]

You really know your stuff. Thank you

[@jimtee9804]

Colt, I have to smile when I watch you work because I work alone as well.

[@lestaylor3641]

That was a super cool money saver and gear getter video Colt.

[@bleepinjeep]

Thanks 👍

[@DarkHawk666]

Nice score with that Tig welder, cant wait to see you put it to work.

[@s7courier]

Great job and thanks..

[@RCRitterFPV]

Although I don't have an Off road vehicle... I appreciate feeling as though I could follow along and do the repair myself... maybe next year....

[@katreniaclark]

Very kewl Colt.

[@jrcook927]

Voting for you guys every day!

[@bleepinjeep]

Thank you JR!

[@taylormade710]

Great content to building a doubler

[@loganstaal3162]

One quick thing a note is the VSS, this is crucial if you’re running an LS, or a.m., 4L 60 in front of it, do you need to take the mount housing and it will basically bolt on to the back of the 460 four-wheel-drive version, you’ll need no adapters, but the VSS sensor can you get a Dakota Digital SGI 100 BT and it will adapt the jeep versus signal to the Chevy pulse per mile requirement, put it in your cab so that you don’t have to worry about water damage

[@doug9418]

Finally 🎉you guys are ahead, hail to Colt & Matt .

[@_S1mba]

cant wait to see the s10 done such a cool unique build

[@josephmcclure6229]

Great video!

[@MattBrownbill]

Nice job!

[@tracykooken2606]

that amigo, was a labor of LOVE !!!!! wow....😊

[@oldschoolmoto]

Good info. you guys are in the lead for onx👍

[@rowlinstoned3715]

I love watchin u cause u remind me so much of one of my favorite cousins i grew up with. I hope u get to go on the ultimate adventure!

[@BG-vq9fd]

Nice explanation

[@apexedmedia]

Love a good doubler! I run a 205 with strong box!

[@joshuazientara4452]

Thanks for sharing

[@Bumblebee4788]

Thanks Teacher👍

[@jamesbigham9036]

Colt in my opinion that unique transfercase is really going to be a big improvement for sure

[@leewelbanks6366]

With your limited shop space got get yourself a Miller Multimatic 220 welder. One welder that does everything, mig, tig, stick in a compact package.

[@alankatterheinrich8660]

I love this channel. 99.9% of what I've learned from here, I will probably never do anything with but it is interesting to me. Unfortunately I dont have any friends that off road or that can help me with my Xj and Im the type of guy that alway does shit the wrong way first. It takes many KZbin videos and FB info to feel comfortable enough to do slightly technical things. I need to change my pinion gear and new bearings in my rear axle as well as new shift solenoids in my transmission.

[@matthewtucker4636]

Colt, you are doing an amazing job. I love love love this build and the more I watch, the more I want this S10 on UA! Your content is awesome. Keep it coming.

[@bleepinjeep]

Thanks Matthew😎👍

[@mathwesrudie1556]

You got my vote as always can't wait to see this thing in action

[@bleepinjeep]

Thank you!

[@SammyTheDitchDoctor]

Loved the pirate 4x4 reference. Brought back memories.

[@MissionRestomod]

Liquid Iron Industries leaf spring sliders are the answer to shackle reversal woes. I used them on my spring over, shackle reversed 79 Wagoneer.

[@raystevens687]

Anyway thanks for sharing information with everyone I appreciate.

[@markgordon6971]

Very interesting things you do. Nice KZbin video. True about vandalized

[@johnoldonekanole602]

So much smarts. You make it look so easy. Maybe you should build them for sale. Thank you for sharing.

[@hotshtsr20]

The full 231 will be loaded more than the solo range box, best spot for the 6 pinion is in the full 231