How to Identify Which Front Axle You Have - Jeep Cherokee/ Comanche XJ + MJ

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The Dana 30 is standard for all 4wd Jeep Cherokee XJs and Comanche MJs, as well as various other Jeep models. This video focuses on the XJ and MJ, as the Dana 30 has many variants and year changes are different between models.
1985-2001 2WD: Beam Shaft
1984-1991: Dana 30 Standard Cut, HP, CAD
1991-1995: Dana 30 Standard Cut, HP
1991-1995 (w/ABS): Standard Cut, HP (Thicker U-joints)
1996-2000: Dana 30 Standard Cut, HP (Thicker U-joints)
2000-2001: Dana 30 Reverse Cut, LP
All axle shafts are interchangeable: all 27 spline.
Low pinion uses the same axle shafts as high pinion.
All ZJs and TJs use LP axles.
NP242 Equipped XJs never had a CAD system.
YJ Dana 30s are equipped with leaf-under-axle spring perches instead of a 4-link coil setup, and all YJs have a CAD axle.
Jeep switched to a Low Pinion Dana 30 in 2000 so the driveshaft wouldn't interfere with the newly designed California Emissions dual catalyst exhaust manifold. Some 2000 models still use the Federal Emissions exhaust, so some 2000 models might still have a High Pinion Axle, but only early examples.
there is no such thing as a Dana 30 Rear Axle; it's probably the Dana 35.
I've experienced many Dana 30s in many Jeeps:
2001 LP Dana 30: 220,000 miles
1998 HP Dana 30: 235,000 miles
1997 HP Dana 30: 410,000 miles
1987 HP Dana 30 (CAD): 120,000 (Aside from the CAD system, nothing else is wrong with it)
None of them have been rebuilt.
This whole video assumes a previous owner hasn't swapped in a different axle, common upgrades are a Dana 44 or Dana 60.
Also check out the identically-formatted video about the Rear Axle: • How to Identify Which ...
How to Identify what Transfer Case you have: • Jeep Cherokee: Transfe...

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7 авг 2021

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Комментарии : 39

@georgiajeepsandguns8277 2 года назад

I feel like I can offer some discussion on the aforementioned yj, tj and wj. The yj has a high pinion disconnect 30 on literally all of them. While the tj had a low pinion 30 or low pinion 44. Wj offered a better steering system and breaks that can be scavenged to build a “super 30” but it still remained that low pinion. Personally I believe the high pinion non disconnect 30 out of the mid year xjs is the best, even better then the rubicon 44. Combined with the wj knuckles and some toob selves it can be a pretty indestructible axle. Obviously this is relatively common knowledge, but I felt I had something to offer to the comments.

@robertbryant7771 8 месяцев назад

First of your videos I ever watched soon after acquiring a basket case MJ. Helped me make the best selection for 4WD conversion. I plucked a cherry HP axle from a 99XJ w/o ABS.

@williamrogers. 2 года назад

I was wondering about these differences. Thanks!!!

@TheRealLifeNPC 2 года назад

Awesome video! I learned a lot that I didn't already know and love the information bombs😁 Now I have an answer to what that CAD system is all about and how much gear oil to get when I change it soon too! 😎

@Deadbuck73 2 года назад

Cad thing… I had that on my 86xj… that explains it… I found the line on it had come off… pushed it back on and had 4x4 again… when I got my 99… I noticed it was gone…. Gone but not forgotten!

@technical19d34 Год назад

My 2000 XJ has the low pinion Dana 30, has 253k miles and I started getting a rumble while braking that is felt in the front end and steering wheel. It's a fast vibration, not a wobble from worn brake discs. Front brakes are totally new in fact brand new discs, calipers, pads, hoses - everything as of a few months ago. Rumbling started just last month. From what I'm reading it's probably from the U-joints on the front driveshaft wearing out, maybe with the low pinion Dana they go quicker, who knows. Haven't totally figured this issue out yet but enjoyed this video and found it very helpful....thank you!

@derrinpickett9948 2 года назад

Good info and narration.

@WAEMIDIV 2 года назад

Thank you

@LouieGiNYC 2 года назад

I fuckin love you. This is engineering. Most videos are changing parts.

@WAEMIDIV 2 года назад

Oh ya der guy, I just got a bit tired of explaining the axles every time someone asked on the forums.

@charliestone892 Год назад

He man,just found your channel..ive had two different 1992 Jeep XJs and both were mildly built for the trail,logging roads etc etc here in middle Ga...well time went on,life happened and lost my jeep due to some tough times...things are way better and looking up these days and got myself a 2000 Jeep XJ 4x4 that I plan to throw 33" mudders on and budget boost type lift.its a clean no rust body but its right hand drive.previous owner pulled the front drive shaft.i cant find a clear answer on whether a LHD shaft will bolt right in or not.no clear answer anywhere on line.i dont know if I will like the RHD. but for what I paid,i will give it a try.the 4.0 has high miles but purrs very smooth....thanks for the info!!

@WAEMIDIV Год назад

The RHD models used the same axles and transfer case, so they could keep the 4wd linkage in the same place and avoid needing to make another stencil with another hole in the floor. So the differential is on the same side, meaning the driveshafts are the same. You can use a LHD driveshaft in a RHD

@9821nick 2 года назад

Low pinion was used in 00-01 to clear the engine Pre-cats. If you have an 00-01 XJ and swap in a high pinion, such as myself, on stock lift and worn bumpstops, you will dent the pre cats with the axle housing if you hit bumps hard. Luckily it seems to only dent the lower housing and not the honeycomb, but thats why Jeep made the switch.

@WAEMIDIV 2 года назад

Yes I figured that out much later after making the video. I wish I could Rewind time and remake it

@tartopom2669 2 года назад

@@WAEMIDIV you can't edit the video?

@WAEMIDIV 2 года назад

@@tartopom2669 to change a video that's already on youtube you have to delete it (and thus delete all it views, comments, and position in the algorithm) and re-upload it as a new video, which starts from scratch. Usually people just put a note in the description or comments about whatever needs to be changed (exhibit A) I've seen some very large youtubers (1M+ subscribers) edit existing videos on youtube, but I don't know how they do it and I assume it's some bonus feature you unlock for getting so many subscribers. For something so trivial as to why Jeep used a low pinion axle in 2000+ Cherokees, meh, not worth basically starting over with the whole video, yanno It doesn't really matter *why*, it just matters they they *did*, and that should be good enough for most people. Those extra curious folk like yourself are usually the first to explore a little deeper into the description/ comments, and now you know the truth that hardly anyone else does!

@tartopom2669 2 года назад

@@WAEMIDIV wow thanks for such a detailed answer 😂 no doubt about that from such an in-depth youtuber. Now it's time to remind you making a video about every engine ever put in a Cherokee 🌚. anyway thanks for these videos, they help me try to identify and repair my '99 2.5 TD

@kaseyvaughn5963 Год назад

How would the axel swap work in the wj? I want to do u joints

@TheRealMikeWilly 7 месяцев назад

When the shaft has a 0° operating angle, U Joints are in fact much stronger than CV axles. BUT as soon as that U Joint shaft starts to take on an operating angle, it's strength diminishes rapidly. @ about 15° operating angle the U joint shaft is roughly the same strength as the CV joint also operating @ a 15° angle. Anything greater than 15° and the U Joint shaft becomes exponentially weaker than CV shafts.

@redlinerider4549 Год назад

Thanks dude. I got a low pinion dana 30 off a 2001 cherokee at the junkyard today. Going to convert from 2wd to 4x4. Do I need the vent line running from the differential to the engine bay? I lowkey forgot to take it..

@WAEMIDIV Год назад

you don't *need* it, but you'll want it. But it doesn't have to be from the junkyard, you can get some oil-rated hose of the same size (I don't know the diameter) and run it somewhere up high The breather hose is meant to never get water inside it. It's routed up high so when you drive through rivers (as one does) the differential doesn't get water inside it. Without that hose, literally nothing bad will happen unless your axle is near or in a lot of water. Rockauto sells the little vent caps that go on the end of it

@MUCKFOOT⁶⁶⁶ 6 дней назад

yeah my low pinion went bad about 110,000 miles

@MUCKFOOT⁶⁶⁶ 6 дней назад

if you are not sure which axel you have 5:53 just get this number.

@mealticketscrub2561 2 года назад

Do any these D30 variations have c clips?

@WAEMIDIV 2 года назад

Yes, the CAD equipped models (1984-1991) do use a C-clip on the inner passenger side shaft (I believe, don't know for sure). Otherwise, the outer Shafts are held in by the wheel bearing axle nut and bearing to knuckle bolts. None of them from 1992 onwards have c-clips

@mealticketscrub2561 2 года назад

@@WAEMIDIV thanks love u

@corbincrafts1469 Год назад

I thought "high pinion" gear sets are reverse cut and "low pinion" is a standard cut ?

@WAEMIDIV Год назад

Yeah I think you're right I always get them mixed up. I think even rockauto had them mixed up at one point which is what threw me off

@Jayman0057 3 года назад

You know who you are

@fiskusmati 6 месяцев назад

High Pinion is Reverse Cut!

@spumplestiffskin3727 2 года назад

what do I have?

@WAEMIDIV 2 года назад

Outback's front differential is obscurely called: 27011AA344

@MyGreatCreation 6 месяцев назад

wait so what the fuck do I have? I have an np242 which I thought was select trac and a 3 piece axle and I know I have both because I have already had to do so much crap to both of them

@WAEMIDIV 6 месяцев назад

If you have a CAD axle and NP242, someone swapped in the NP242. They never left the factory like that

@MyGreatCreation 6 месяцев назад

@@WAEMIDIV weird, that could be why I'm having all these problems

@WAEMIDIV 6 месяцев назад

@MyGreatCreation if the CAD axle doesn't engage and you have the NP242 in full time mode, it will only free spin the disconnected axle shaft, and you won't move anywhere. Does this describe what is happening?

@MyGreatCreation 6 месяцев назад

@@WAEMIDIV no I fixed that issue but I drove around after I permanently engaged the cad I had some really bind binding issue, not sure where from, but I kept getting power less and then a huge bang and all the power returned, but then I disconnected the front driveshaft which was under immense tension while the transfer case was in neutral. Also while all this was happening I never actually engaged 4wd so the transfer case may have slipped or somehow got bound up