Tera Low 4:1 Transfer Case Install
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- Опубліковано 29 жов 2015
- In this video we will install a TeraFlex 4:1 Low Range kit into our NP231 Transfer case for the scorpion crawler. This kit makes your crawl ratio extremely low while still keeping the 1:1 ratio for everyday highway driving.
How to Install an SYE: • How To Install an SYE ...
How to Change an Input Shaft: • How-To Open a Transfer...
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Website: www.bleepinjeep.com
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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. - Авто та транспорт
This man did all of this without cussing or bleeding.
I about lost it when you said "in my CASE" funniest thing I've heard all day
Found the same thing when I popped my case open for the SYE. That large snap ring was just floating around in there, but some of the pieces it held in had fallen off and stuck to the filter magnet. That was an interesting find first time around.
I just popped mine open for the sye too and found that same snap ring and a little rectangular sleeve of some sort
Your knowledge and explanations are wonderful.
Great video man, one thing I have found while torquing pinion nuts/yokes for crush sleeves is to use a long pipe wrench on the outer side of the yoke and a breaker bar on the nut and put the pipe wrench at your chest and pull the breaker bar/torque wrench toward you. Works good for 14 bolt gear swaps and would have made this super easy for you. Looking forward to a review of what you think of this setup, getting back into the jeep life and have been considering keeping it mild and doing this kit.
What I did for my yoke nuts was take the case and hold it down (like you did) but then take a huge pipe wrench, and use that to hold the yoke in place. It worked pretty well.
where do you buy the bigger bolt and spring ?
Nice vid. You are very good at making simple tasks look incredibly difficult though haha
Swapping in a Toyota RF1A Transfer Case would be a good idea too. Strong, light, gear driven, and most of all, modular.
LOL as you were pouring it I was saying "wow I'm really surprised it's not coming out the vent."
Your the paint guy on pbs of Jeeps , just awesome !
Bob Ross
nice to see the case apart and parts just to know it. thanks
Holy hell this Tera flex kit is EXPENSIVE might as well go get an Atlas especially after also considering having done the sye kit too
but does the atlas 2 work with a yj? I was looking into it but couldn't figure out if it would work for a yj...
Matt & all who are watching: use a pipe wrench to hold the T-case yoke while torquing the nut...much easier than straps & vises, etc. Also, you don't have to guess when installing/clocking speed sensor...on the side of the sensor there will be a range for tooth count (e.g. 38-45 teeth, etc.). Count the Speedo gear teeth, then align with the slot on the hold-down piece (see Advanced Adapters' ATE install instructions).
nibbler is called a roloc bristle disk. Be careful when using it around holes that may have things flowing threw them, the plastic dust could clog up the holes.
Hey Matt. Great video very detailed!
thanks man!
Please can you do a video ,of the tcases with the NP241 which ones had the mass vibe dampner ,and tcase yokes types ,like flange style...vs classic ...rear tcase and round pinion flange also the rubi 241 driveshafts that all have the round flange ...tks ! Great videos !!!
I do what your do. What do you do with your old parts you replace? I have a box full of them.
LOL do an episode like Mr Rogers. Love the show man, keep up the grate work!
ua-cam.com/video/ik9Zhya8tbE/v-deo.html
Old cheap Tech advice for everyone.... butter knife works really well for seperating gaskets ... the cheaper the knife the better (cause they will deform instead of gouging something expensive)... if you've ever looked in an old Techs tool box and seen a beat up butter knife just sitting there.... thats what its for ;)
I used to have a copper blade with a bunch of electrical tape and a portion of a shop towel for the handle. I don't remember where I got it...or where it went, now I think about it. It wasn't an actual nife (TO HELL WITH THE SILENT "K" IN NIFE!) blade made out of copper, it was something like 1.5" X 6" X .1" copper rectangle shaped to desired dimensions via stone wheel and typical shop use.
If you don’t have snap ring pliers, a couple of flat blade screwdrivers, ranging from glasses to standard size, can be used to carefully phanagle snap rings.
I just got done installing mine. I traded for it. It had a bad bearing that I replaced. Haven't completely finished up the swap yet so I haven't had a chance to test the low range. It won't go into 4 low right now, but I think that will change once I get it rolling.
I put the mode ring in backwards before. You get 2wd and neutral! I was so aggravated I had to pull it all back apart again.
Still have mine. Rubicon, Dusy Ershim, Johnson valley, king of the Hammers etc. I guess I’m a lucky one.
great video!
I noticed you didn't fill the yoke spline with RTV like you did in your short shaft video ?
did you learn something better?
Great job on the how too,I really appreciate them.
Is there a way to do this upgrade with changing only the gears and not the whole T-case half?
Great video
Matt, next time you need to tighten any type of pinion nut get yourself a big pipe wrench and use it to hold the side of the yoke. For the t-case it's pretty easy. Rear pinion you'll need to do a few 50lb curls to warm up, but it still works great.
Good idea, I should have done that when I had it strapped to the table... Sometimes the simplest things can be overlooked!
Found a teraflex 4to 1 kit should I send it back???
What size yoke did you put on that np231 are they the ones that fit the full size axle U-joints
At 30:35 when you turn the yoke and it makes that clunk clunk sound is that normal? I get that sound out on the trail whenever I'm in 4wd and make any sudden stops, as it will rock back and forth and produce that sound. I've pinpointed the sound to exactly what you did by removing my front driveshaft and putting it in 4wd and rocking the front yoke like you just did. Just wondering as I don't want to destroy my transfer case. Its a 2004 Jeep Wrangler rubicon with a 5 speed.
Haha love this video and love this mod!!
Matt, I need some advice. I have a 4.0 L with a 5 speed and a 231 TC in my TJ. I am planning a trail build and I have a set of Dana 44s from a Rubicon that I will regear. This option would have been great for me but it has been discontinued. The only available options I can find are sourcing a Rubicon 241 (hard to find) or $4000 for an Atlas. The Rubicrawler is for autos only. Are you aware of something I am missing? Any suggestions would be greatly appreciated. I love your channel and all the good advice you provide.
Most shops will just impact drive those big nuts on when you arent looking. They don't bother trying to torque them. The guys that do have a special tool that bolts to the face of the yoke to hold it.
I cut a piece of bed frame about three feet long, drilled two holes and bolted it to the thing to tighten it down
+Neil Watson (Miatreya)
good job drilling holes in bed frame - the worlds most hated steel (made from recycled railroad iron with high manganese content) - horrible stuff
to tight the yoke i just use a big pipe wrench to hold the yoke and them tight, so no stress in the internals parts with no oil in it.
Whats your opinion on a 'Hack N Tap' SYE? my old jeep had one and I HATED it!!!! the guy I got it from did a crap job. the normal seal never worked cause it was all wrong. ahhhh
do you know any good ways to make body mounts
Excellent video, I would never do this, I'd probably buy a rubicon transfer case from the wreckers. Still good to see how it's done though.
what year rubicon transfer case? I just bought a jeep with one of these in it and it's very loud. I can't even shift it into 4lo with the engine running.
@@bobkuboske6494 Get the same year as your vehicle. Is yours a manual or Auto?
@@fourbypete 98, automatic. I didn't think they made a rubicon til 05
@@bobkuboske6494 Yeah, I'm not sure. Maybe just do a service on what you have or run a thicker oil. might quiet it down.
in your disclaimer you forgot "do not drink transfer case fluid" lol great vid
I have an off topic question. If you remove the 4wd fuse. Will it harm the transfer case in "2 lo"? For pulling on pavement?
Teraflex discontinued the kit. Are there any other options available in the marketplace.
Hey matt/ whats your profession,do you do this for a living ? Just curious,and thanks for all the vids 👌
I used a big ass pipe wrench to hold the yoke when I tightened the nut
Great video for a very valuable mod. But it would help if we could download or copy a list of all the new parts that you installed so we could order them. With my luck I would forget to order some small part and have to stop work until it arrived.
I've seen and used snap ring pliers with knurling on the faces. More grip
+neil petersen
They're called lock rings.
The Best vídeos XJ
Would you happen to know a part number for the pressed in berring mines bad and needs a new one I've got the sye kit and driveshaft
Would this kit fit on my 2000 Durango? I know that the NP231 in the Durango is a little different, mainly the back half of the housing, the output shaft seems longer, and it doesn't have the speedometer gear on it. If those are the only differences, I don't see how this wouldn't work on a Dodge too.
I was wondering the same thing about my Dakota
where is the bleepin jeep yoke tool ?
What was the LONG TERM with this bad boy? Just found a company that makes adapters for the 231J T-case that mates two of them for some doubler action and made me think of this video and wonder what ever became of it.
Is there anything like this kit nowadays in 2020? I couldn’t seem to find it online
Pipe wrench on the ear press flat on the table would hold it for yah.... similar situation to what i had to do...
Terra flex says there is timing marks on the planitary gears i noticed you werent to concerned with that??
What's the link to order the 4 to 1 transfer case
Not sure if you are monitoring this channel, but quick question: I installed a new CenterForce II clutch kit with flywheel, put everything back together and the transmission shifts but no rear tire engagement in 2 wheel drive. I put the Jeep into 4X4 and it works (all wheels turn) in all three 4X4 modes. I assume that something moved in the Transfer case, do you know how I can adjust it to have it engage the rear wheels in 2 wheel drive? Thanks.
Any update on this? Has it been holding up the abuse?
now would have been a good time for the 2wd low shift fork
new t shirt idea:
"Bleepinjeepers don't yoke around"
with a nice lookin SYE for the graphic.
what years has the bigger oem bolt ?
Where do I buy all the parts from please
You know those yokes have two large flat spots on them.......like for a large crescent wrench for example....
So now that it's no longer being sold. What's our options without paying for a Atlas or Rubi at over $2000?
You should have sold the shirt as an authentic Matt RTV embossed special. 😜
Next time try using a pipe wrench to hold the yokes while you tighten the nut with your torque wrench. You wont struggle as much! I used this method when I rebuilt my np 242
Do you know why they say not to spread the RTV sealant?
+ttwilightzzone I've heard a few things: to run a continuous bead, and let the pressure of the bolted piece do the spreading; to spread RTV on one side of the mating surfaces, to ensure that there is RTV across the entire gasket area; or to spread RTV on both sides of the gasket area, to ensure that there are no gaps in the seal, or air pockets that could rupture under pressure, shock, vibration, etc.As far as I'm concerned, I've tried all three, and haven't noticed much difference in any of them. The latter two I mentioned would need some extra care, since air pockets could occur if there was a major void of RTV, or an area where it was much thinner than other areas and the surrounding RTV didn't squish to fill that gap. I have noticed that the latter two do use more RTV, (at least compared to the solid bead method) which could be good or bad, depending on what you're working on.But I think it all comes down to principle more than practice. A clean gasket mating surface and evenly applied RTV (applied in any shape, form, or fashion) should do any job just fine.
Why do you never lube stuff as you assemble it ? You have the ability to do all this work to your Jeep but yet you miss this crucial part of assembly.
So why is this kit no longer available
Hi Matt. Nice work, quick question. Can't you accomplish a similar result by gearing your diffs deeper? I geared my XJ with 4.88 revolution gears, and run 35" tires. In 4-low it seems to crawl at a nice pace? Thanks for your input. Really enjoy your videos.
+Brian Waters Yes but 5.13 is about the lowest you can go on the ring and pinion so what happens if you want to go even lower than that? Some people double up T-cases, some people buy an Atlas, or some people install the Tera 4:1 kit. In my crawler I will be running this 4:1 with 5:13''s and 40" tires.
Adding a 4:1 t-case also allows you to retain functional high range while having good crawling ability
Problem with deep gears in your diffs is you're constantly in said low range, with a 4:1 transfer case you can have that 1:1 when you want to cruise on the freeway or drive around town then you can gear down when you'd like to for crawling. Another option is a Klune underdrive although I'm not sure how the prices compare to the Teraflex kit.
+Brian Athay. I see now. Thanks.
+Brian Waters anytime buddy boy
Heya Matt... those transfer cases don't have snap rings. They're called lock rings. I remember the first time i asked for lockring pliers at a auto store... they handed me a set of snap ring pliers!
So a 3:21 gear would mean the axle shaft turn 3 times and the wheels turns 21 times Matt?
+papa54321 A 3:21 Gear would equal to a 0.143:1 so every 1/7 of a turn the drive shaft turns once. a 3.21 gear would be every 3.21 turns the drive shaft (or wheel[s]) turns once.
so yes, your right, but in a highly unconventional way of stating gear ratios :)
The Syncro Sleeve taper end should face the front of the t-case, yours is in backwards.
Awesome
hows this transfer case been holding up? theres one for sale on craigslist around me and I want to put it on my xj with an ax-15
It broke ;(
@@bleepinjeep thanks ill skip that then
you should invest in some bearing tools and some seal drivers :)
Why in the hell would ANYONE want a seal driving them around? Always barking, balancing a beach ball on their nose, smell like ocean (or low tide after a bowel movement)...wait, we aren't talking about the same thing are we?
How much is this part cost?
Here's an NP231 question, my jeep when I have it in 4-lo it likes to pop out on the trail when it gets real nasty. Ideas on why it does that? If I have to rebuild it I'm tempted to do this Teraflex kit, then maybe in the future have a Klune underdrive in front of that... Ooooh
Could just be the linkage...
+BleepinJeep yeah could be... Previous owner did it with my SM420 and 4.6 stroker, both of those are shot now so I'm hoping the 231 is okay to keep, save me some dough in the future
+BleepinJeep you should check out those Klune underdrives. This Tera low kit runs around 1200 and the Klunes are 1400-1600, you can get another 2.72:1 or 4:1 ratios. Then you have the added benefit of having a variety of low ranges to go with, sorta like stacking transfer cases but it adds minimal length to your drivetrain. You could have 2.72:1, 4:1, or 10.88:1 gear ratios just in the transfer case. Multiply on the diffs, and transmission ratios and you could easily be around 150:1 in your lowest range. Epic stuff.
+Brian Athay I checked the site and it says they no longer make them...
+BleepinJeep really?!? Dang.. That just ruined my day haha
I think this was discontinued by Teraflex. Sounds like a good idea 💡. Probably didn't sell well during 08-16. A lot of companies went broke back then 😕
So I installed one of these. 32 months later the Planetary gears blew up. After reading the jeep forums, this seems to be a common problem. Not sure when you made this video, but what are your thoughts on this now?
+Bev mine blew up too, they discontinued them.
So other than an Atlas or finding a rubicon TC are there any other options out there? I have a 98 TJ.
If anyone is interested, I called Teraflex today. They are offering an upgrade program for anyone who had a tera low and had issues with it. Send them back the kit, (has to be less than 5 years old) and they will upgrade your TC to an Atlas for $1900. Still alot, but less than the $2500 it is retailing for. And you have to do something, who wants to go back to a stock 231?
i cant find the tera flex 4 to 1 anymore any ideas where i can find one
+Leadfoot2112 they stopped making them.
You will only find one in the trash. They were a great idea, but they could not get them to keep from coming apart. Though I'm sure somebody has one that has never given them a bit of trouble.
Do they even make this kit anymore I think I want it??
Nope the kit we discontinued because it would burn up really easily if you do anything more than crawling
I wouldn't mind building one but all the forums say go with an atlas because of the failure rate of the teralow. Anybody have any experience to the contrary???
They don’t make them anymore
Well I found a new one from Quadratech.....should I send it back???
So I got a cherokee a couple of months ago and I haven't been able to shift it into 4low. It goes into 4hi and neutral fine but it just won't go into 4low. Do you have any idea what the deal is?
It is most likely the shift linkage that needs to be adjusted. Look it up it takes about 10 minutes to do.
I tried adjusting it but it didn't really help.
+Blue Boy then its probably those plastic pads he was talking about.
+Blue Boy take the linkage off the case and see if you can shift it manually by hand. I have a video coming up that might help you with this.
Alright thanks I'll try that.
Why is this still current on you tube , they don't even make that conversion anymore .
would like to buy this case kit... but i noticed in another video that you said it kinda shit the bed. also another guy on UA-cam said his planetary blew up after 32 months of owning it... can you do a video reviewing your setup and how its working out for you?
@bleepinjeep
+Coltan Vollrath they discontinued them already...
BleepinJeep oh alright. thanks!
Why dex/merc and not atf +4?
because dex/merc 3 is what is best for the aw4 transmission so he probably had it on hand. my xj had
fresh atf+4 in the trans when I got it, didn't shift right and slipped some, put dex/merc in it and it fixed it, BTW advance auto and the like tell you to put atf+4 in them but there wrong oe spec is dex/merc.
If the t-case has never been apart or re-assembled properly, the black 10 mm 12 pt bolts will be where the pry points are. As far as I know their only purpose is to show where it is safe to pry
+charles villeneuve good info thanks
'in MY case'...lol I see what you did there. haha
do you need to change gears in the axles at all?
depends on what gear ratio you need. this case doesn't affect 2wd gearing.
What about 4 hi?
Adam949 no because the 4-1 is for low range
can't you just drop the transmission into 2nd gear the get a better crawling ratio and that way you can play on the rocks and in the sand?
Adam949 Lube is for sloppy anal only
would I just be better off to but a t-case from a rubicon
sean peterson I was thinking about that too. By the time you get done ordering all parts like the 4:1 kit, sye, and maybe a tera 2 low... you could get a used rubicon tcase out of a tj or jk for a lot cheaper than this 4:1 kit. If you can locate one lol. I can locate a few where im from for around 800 bucks. The tera low kit is like 1200 or something like that. By the time you get done building it.. your stuck with a rebuilt 231 tcase with only 4:1 low range. so its not really worth it in my opinion. Id rather save up for an atlas 4 speed and have more gearing options and independently control the front and rear axles. But thats just me... ill get there one day. The tera low kit would be worth it if it wasnt so costly. Plus it makes you reuse old bearing or have to buy new lol. I dont like that. If you pay that much for one... shouldnt it come with everything to rebuild it? I love how the scorpion crawler turned out... but its screaming for an atlas tcase.
Why don't they make this product anymore ?
Is this case half any good? It has a lot of bad reviews. But that could have been from misuse or bad installation?
The jeep is just now coming out of the garage, ask me again in 6 months.
BleepinJeep 5 months to go lol
Shaun Somma I'm going to guess bad, because newest video says it went out in him.
time's up, how is it lol
@@bleepinjeep so how is it?
Great video, but why not just buy a rock-trac, or save just a bit more money and get an atlas? With that kit and the sye , bearings, maybe that detent you are damn near if not over the price for a base atlas.
i like the shirt
Do yoy still have normal ratio?
Yes
BleepinJeep i wanna do this mod. But my jeep is old and probably not worth doing it.
BleepinJeep Are you canadian? Because you sound so much like Red Green its scary.
No longer available. I grenaded mine... over speed. However it was one of the prototypes. Lasted almost 15 years.
The rubicon t case slowly killed the demand.
Had to put in an atlas. (Not upset...just $$$ more than I wanted.)
In my case I see what you did there
Ok who sell this upgrade now????
Nobody. It's gone.
Ya kinda though so thx
Ok, I'm confused here. You took out all the parts from old half case and put them in the new case, but how does that allow you to have a new lower gear ratio? I'm sure I'm missing something. Nonetheless, excellent video!!
Paul Moore The planetary gear set is different.
Didnt even wear his helmet