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00:0040 inch tall tires on a jeep with almost no lift it's like we're going back in time we're building
00:11one of my favorite jeep body styles ever comp cut low center of gravity crawler it's literally
00:17almost no lift and a huge tire how do you do it just all the cutting just cut every single thing
00:25out of the jeep and the tire will easily fit there is no question that i love jeeps but you don't
00:34always have to build a jeep into like the ultimate off-road machine sometimes you can build a jeep
00:40on a budget and that's where this jeep comes into play if you're looking to build a jeep
00:45save some money and just use a whole bunch of junkyard parts you can't go wrong with a good
00:51used jeep tj this particular tj i actually got for free and the reason i got it for free is because
00:57the frame is completely rusted out and if you were shopping for a jeep like this with a bad frame
01:03which is one thing that often happens with the jeep tjs you can pick them up for right around a
01:08thousand bucks it runs you can drive it around but you certainly can't put it on the road and that is
01:13because the frame has giant holes in it but that's okay because i am somewhat of a hoarder and i have a
01:20lot of things laying around my building and i happen to have a whole new frame for this vehicle
01:26my friend colt says it's not hoarding if it's cool stuff and i completely agree with that statement
01:32because this is just something that i had laying around and i kept it because it's cool it's a rust
01:38free jeep tj frame we'd already cut all the coil buckets off the front because we're going to do a
01:43coilover conversion on it and it is virtually rust free and has a complete drivetrain in it now i'm not
01:48going to use the drivetrain i'm not going to use these axles but i do want the frame so thank
01:52goodness i hoarded this around the back of the shop because it is going to allow me to turn this jeep tj
01:59into what i think is one of the best budget off-road vehicles out there and that is a lcg crawler low
02:06center of gravity so i'm talking 40 inch tall tires with two inches of lift and a wheelbase stretch
02:12and that wheelbase stretch means we get to cut this frame in half step one that's the best part all
02:19this other stuff's got to go
02:20the key to an lcg or low center of gravity build it starts with the frame now the end goal here is to
02:39fit a 40 inch tall tire with only two inches of suspension lift and then no body lift we'll just
02:46basically cut the body up to fit the tires now the problem with the tj frames is the rear frame section
02:53it's actually fairly wide so if you do plan to run coilovers which i do plan to do on this build
02:58it's hard to fit them between the frame and the tire now you can cut the frame out and what's called
03:03french the coilovers in but you can also just do what's called a back half kit which is actually
03:09almost a little bit easier even though it's a little bit more work because you got to get the
03:13body in the way but there's no body on this so the back half frame kit is essentially going to replace
03:17the entire back half of this jeep frame from pretty much the lower control mount all the way back so
03:23the lower control arm mount we're going to cut the frame right there and replace it with this new
03:27frame section it'll bring it in to be a little bit narrower they'll give us a room for our coilovers
03:31and much more room for the shocks and more up travel which is what we're after
03:35if you're working on a budget and you're building a hardcore jeep the axle package that's kind of
03:51become the new baby one ton our jeep jl or in this case jt axles now this is two complete takeouts
03:59out of a jeep gladiator mojave now i paid three thousand dollars for both of these axle assemblies
04:06and they have less than 10 000 miles on them nice thing about it is it already has an electric locker
04:12in the back but we're going to use it a little bit differently i'll show you that a little bit later
04:16but the axles themselves they're actually really good they have an incredibly strong ring and pinion
04:22they have really good brakes good size axle tubes and the best part is they can easily handle a 40 inch
04:29tall tire with a little bit of upgrades and the nice thing is if you do 40 inch tall tires on a
04:34set of axles like this it's kind of the equivalent to running like a 43 or a 44 on a one ton axle if i
04:41was to go buy a one ton axle i'd lose all that ground clearance i'd add a whole bunch of weight to the jeep
04:46and i'd still have the same amount of room underneath the axle as i will with these with 40s if you've got a
04:52jeep tj project in your future do not sleep on the jl or gladiator axle package they really are the new
05:00baby one ton and they are a great option i don't need any of these brackets on this axle because
05:05we're going to be building custom suspension so first things first all of them have to go
05:09for today's tech tip we're going to answer a question that i get asked
05:39a lot and that is when is a good time to use an oxyfuel torch and when is a good time to use a hand
05:47plasma and when cutting brackets off an axle this is the perfect time to talk about why i choose to
05:54use the oxyfuel torch instead of the hand plasma they both do the job well but here is why i pick what
05:59i use now an oxyfuel torch uh it's been around forever it's one of the original ways for cutting
06:05metal we basically have a mixing valve at the bottom or a mixing chamber where we mix the fuel
06:11in this case i'm using acetylene and oxygen that is then mixed and ignited and creates a cutting flame
06:17at the tip and then i introduced more oxygen while i'm cutting to blow the molten metal away
06:24and that's what causes the cut the nice thing about an oxyfuel torch is it can cut any type of ferrous
06:30metal and really there is no limit i have seen oxyfuel torches cut steel that is 24 inches thick i find
06:39that i have more control over the cutting flame especially when we're working our way around areas
06:44like this bracket that used to be on this axle some general benefits of the oxyfuel torch setup number one
06:50you don't need a power supply so you don't have to plug it into the wall you just need two tanks one of
06:54fuel and one of oxygen so that makes it actually pretty mobile you can use it inside or outside
07:00it's not affected by any wind or air that blows around unlike a welder or a plasma cutter and one
07:05of the other nice things is it's not only used for cutting you can actually weld with an oxyfuel
07:10torch setup and it's cheap good setup like this maybe 500 bucks and you're ready to go just got
07:15to add the tanks to it now let's talk about a plasma cutter now a plasma cutter is another way to cut
07:23things like brackets off axles now the way that it works is it uses electricity and a piece of rare
07:29earth material inside here to make a small electrical arc similar to the arc that is developed when
07:34you're welding but then it uses compressed air to blow that arc through whatever you're cutting nice
07:41thing about a plasma cutter is it can cut pretty much anything it doesn't just have to be a ferrous
07:46material like steel it can cut steel aluminum stainless steel copper brass if it's metal
07:53or any type of material like that you can cut it with a plasma cutter it's fast it's quick it's easy
07:59it's loud but in my opinion it's not as exact when you're doing stuff like this around brackets
08:05and it's a little bit harder to manipulate
08:09nope
08:13now the benefits of the plasma cutter is it actually can be a little bit faster than an oxyfuel torch
08:18but it does also require a few more items we obviously have to have power for the cutter so
08:23that's either 110 or 220 volt and then you have to have some type of compressed air source you're
08:27going to air compressor that feeds into the plasma cutter uh the other thing is it is obviously
08:33creating an arc and reaching ground so you are going to have to have a good quality ground when
08:37you're cutting and if that ground messes up just like it would mess up when you're welding there's a
08:41chance it's going to affect the cut honestly they're both great machines whether you choose to use
08:46oxyfuel or plasma it's really kind of personal choice they're great you really want to have both
08:51of the tools in your shop if you can because there's times when you're going to want to grab
08:55that oxyfuel torch and there's going to be times when you want to grab a plasma
09:02so we understand that the jl and jt axles are incredibly strong and they'll be perfect for
09:08this vehicle but we're not going to install them just as they sit if we're going to run 40 inch
09:11tall tires we at the very least have to re-gear them but we're going to go a little bit further
09:16than that now one of the reasons that the jl and jt axles are so strong it's because of the ring
09:22and pinion if you've had your hands on any of the jk or dana 44 style ring opinions you can tell
09:28just by looking at this pinion that it is a lot stronger it has a lot larger size and that is where
09:34the strength is given inside that pinion but it also has to do with the cut of the gears so a factory
09:41jl or jt has what's called a two cut gear in it now what that means is that the face of the actual
09:47ring gear is the same profile all the way across from the heel to the toe when you upgrade your gears
09:54or simply change them out you don't want to basically downgrade the gears and go to a gear that
09:59may have a five cut profile the five cut gear has a difference in two size and therefore is not as
10:05strong revolution gear and axle ring and pinions for the jl and jt they are a two cut gear just like
10:12the factory oem gear set so we're going to retain that strength but we're going to be able to upgrade
10:16them with the 513 ratio to match our gears and tires now revolution offers this in a complete gear
10:22package so that's ring and pinions for the front and master install kit so you can get them in
10:27going to match that with a set of heavy duty diff covers we're going to upgrade the axle shafts both
10:32front and rear as well now these are 4340 chrome moly shafts for both the rear and the front it's
10:37a complete front kit which comes with heavy duty u-joints and a front axle disconnect delete so it's a
10:44one-piece shaft on the long side the rears the nice thing about them is they come fully assembled
10:49with the bearings and the tone rings and the wheel studs so it's a simple install as for traction
10:55devices we're kind of going to work in our budget uh theme here because the nice thing about the jt
11:01axles that i got is it has an electronic locker in the rear from the factory i like to set up my wheel
11:06and rigs with some type of mechanical traction adding device in the back and then a selectable
11:12locker up front that way when you're on the trail you always know you're going to have two wheels
11:16spinning in the back so for the back of our axles we're actually going to remove the electric locker
11:21and replace it with an eaten true track that will ensure that we have that mechanical additional
11:27traction device in the rear no buttons no switches no nothing just traction when we need it then we're
11:33going to take the e-locker we're going to move it to the front axle because right now that axle's open
11:38and then we'll end up with a selectable locker in the front which is exactly what i want first we've
11:44got to take them all apart there's lots of fluid in there come on
12:03the jl axles are a crush sleeve axle so that means you have to tighten the pinion nut slowly now when
12:16you're dealing with these high speed cv flanges like that's on this one it can be hard to hold it
12:21because it's perfectly round so i just drop a punch into one of the locating holes and just hold on to
12:26it i also keep readjusting the socket because what i do is i look for an identifier on the socket in this
12:32case it's actually the number of the size and that way when i put it on there and pull the trigger i
12:36just want to move the nut an eighth of a turn at a time until i get the right pinion bearing preload
12:41pinion bearing preload is the rotational load or amount of power it takes to turn this yoke
12:47when it's sitting in here alone in this case it's about 15 inch pounds of rotational load so that's what
13:00what's going on today in the shop we are working on this old worn out jeep tj and i'm trying to build
13:25what we used to call in the old days like a throwback low center of gravity crawler now the
13:30whole idea of an lcg crawler is to keep the body down as low as you can over the suspension i'm
13:36prepping another frame for this vehicle because the frame underneath this one is rotten wow now it's
13:41time to prep the body and it's going to be easier to do that but the body's still in its original frame
13:46so the first thing we got to do is basically strip a bunch of parts off because for a true lcg crawler
13:51we're basically going to do what's called highlining this vehicle so we're going to remove this bottom
13:56section of the hood and essentially move the fender up into the hood now we do that with some other
14:01parts but that means that all this stuff here and there and all that kind of stuff it's got to go
14:14the key to getting this jeep as low as possible actually all revolves around these corners now this
14:19is a very popular aftermarket corner armor on this jeep but our plan is to basically raise this wheel
14:26well so high that we essentially have to cut out most of the sheet metal that's underneath here so
14:31we're going to be putting a set of high clearance corners on this we're also stretching the wheelbase
14:36of this jeep to 106 inches so that means that this tire is eventually going to basically be all the
14:41way back here so we're going to perform what's called a comp cut so we're going to cut this body
14:46basically all the way across here and then come down here on an angle essentially removing the rear
14:51left corner of the jeep tub to make room for our 40 inch tall tire so this corner armor has to go
14:57the rocker's got to go and then we can put our new corner on mark it and cut it
15:05oh it was just a really long bolt
15:06now if you plan to perform one of these stretch kits on your jeep tj you do need to think of a
15:18couple things you can see right here that this is the section that we're going to be cutting out and
15:23obviously this is the filler neck if you're going to stretch the wheelbase as far as we plan to do
15:28on this there is no way to still run a factory fuel tank underneath the jeep your only option is to
15:33put some type of fuel cell right behind the back seat which is what a lot of us used to do
15:38in the good old days as we like to say and that's what we'll do with this jeep right here the fuel tank
15:43will no longer be part of this particular setup we'll put a cell in the back but you can see how
15:47much of this sheet metal is going to go away and with that tire moved all the way back and now with
15:51the suspension being able to come up this is how much extra room we have just by performing this
15:56modification let's mark this top it
16:20what's it hung on
16:26boom gone when you do these high comp cut corners you can see that the actual fender is actually
16:33higher than the inner fender well on the factory tj and that's part of the plan we're going to cut
16:38these original inner fender wells out and replace them with some new sheet metal fenders that'll
16:43actually be almost even with the top of the soft top mount right here so to basically finish this out
16:49we'll go ahead and just carve these out of the way so we don't see them and we can work around them
16:54when we're doing things like mounting shocks and suspension and then i think we're pretty much ready
16:59to pull this body off
17:11with the body up and out of the way you can really see the shape that this frame was in it was absolutely
17:17shot there was some repairs done to it but it's definitely not able to be used on this project so
17:23our new frame is pretty much prepped and ready to slide underneath we've already done our body
17:27modification so the plan now will be to roll this frame out of the way we'll go ahead and get our
17:32new frame set up underneath and drop the body down and we can test fit our big old tires and wheels
17:42and get our new frame and the back half kit basically means we've got to move the frame further up inside
17:54the body so what we need to do now that the body is ready to drop back on we need to come in here and
17:59basically trim a pocket for this frame rail to fit up in and then this bumper will basically line up with
18:05the bottom of our comp cut corner
18:22today in the shop it's all about a budget tj and i'm building what is one of my favorite setups it's
18:28the lcg low center gravity crawler so we're building it super low and we stretch the wheelbase a bunch now
18:34the donor vehicle we added a four liter in it that's a good motor but honestly the nice thing
18:38is is nowadays you can pick up these junkyard ls engines super cheap i got this whole package right
18:44here about a thousand bucks and that is a six liter engine with a four l80 now it's two wheel drive
18:49four l80 but that wasn't that's not a big deal i have a four wheel drive one i can swap onto here for
18:53now but i couldn't pass up on the deal so this engine in our tj will be awesome but i never liked how
19:00these engines look with this big plastic intake and obviously we're going to need a way to run it
19:05so for that we've got some cool new parts if you're trying to get your ls engine to run in your project
19:13yes you could cut down a factory harness and use a junkyard computer but for just a small investment
19:18you can get an all-new harness and an ecu to run that engine from company like phytek but an even
19:25better option is to go with a complete efi fuel system from phytek this is the nitro port ls fuel
19:34injection package it comes with an all-new all-aluminum intake manifold with a short runner design for
19:41high horsepower rpm delivery of power the manifold is also ported and prepped for either nitrous or
19:48water methanol injection it comes with everything that you need an all-new harness fuel rails fuel
19:55injectors throttle body all the sensors you need to make the engine run wideband o2 the computer to
20:01control it and you can add optional transmission control for popular transmissions like the 4l80 or
20:07the 4l60 and then you even have a handheld that not only can you monitor all the engine's vitals with
20:13but you can do the tuning to make the engine operate optimally this kit is designed to work with
20:19engines that make 500 750 or even a thousand horsepower and it's available with either a 92
20:25millimeter or a 102 millimeter throttle body on the cable driven throttle body design this is the
20:32perfect package if you couple it with the phytek fuel delivery system you're going to get a new fuel
20:38pump fuel filter fuel pressure regulator and all the fuel lines needed to get the fuel from the tank up to
20:45to the engine at the correct pressure and the correct flow to make it run perfect
21:01so the next step in building this vehicle is going to be to set the wheelbase the nice thing
21:05about these cop cuts is we can stretch the wheelbase to whatever we want i'm going to shoot for 106 inches
21:11that'll basically mean that the rear tire is sticking out just past the rear bumper it'll be
21:17perfect for this setup then i got to build a complete custom suspension to get our new jl axle
21:22in that position but this is all it takes to build yourself one of these lcg crawlers on a budget
21:28it's literally just a pile of labor a whole bunch of cutting just cut and shove and make everything
21:34fit inside this body and it's going to be a damn cool tj the coolest
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