Discussion of d30a fitments

Back-n-Black · **Posted:** Wed Feb 18, 2009 12:31 am

First off i do not want this to be a mad or fighting thread so if your feeling angry please go beat the dog or your wife but don't bring it in here. :lol:

Everyone's opinion should be respected and everyone should be allowed to join in.

I would like to discuss why the lunchbox lockers, Detroit locker and other d30 lockers do not work in the d30a?

After doing a bunch of digging thew old threads i see others had installed lunchbox lockers in the front d30a diff, but then fell off the face of the forums so asking them for long term drawbacks/reviews isn't really going to work.

So first off
#1. Is the d30a carrier the same as the d30? All i can find is that the pinion gear is longer.
#2 Does the longer pinion gear in some way effect the fit of some of these lockers?
#3 What besides the locker fitting in the carrier and matching the axle spline keeps them from working?

Boblemoche · **Posted:** Wed Feb 18, 2009 12:40 am

#1 yes
#2 no
#3 auto lockers like the detroit or lunchbox lockers create a lot of shockloads witch will destroy the d30a even faster also some lockers like the OX require a special cover that do not fit the d30a

Back-n-Black · **Posted:** Wed Feb 18, 2009 2:25 am

I can't find all of the front diff failures i believe some where lost in the forum transfer or upgrade or what ever. But here are the ones i have found and some of the conditions that brought it on.

Bakerkj (gas 3.7) open front diff………front tires spinning came down on ground broke
Kj-bol (gas 3.7) open front diff…….. tires spinning on hill climb grabed traction and broke
Sandiegodave (gas 3.7) Detroit true-trac..LT245/75R16 BFG A/T KO's…NO ESP….bouncing with wheels spinning post page 3
2mopar_diesels (crd)Detroit true-trac..235/75/16 firestone a/t....towing truck in reverse no wheel spin
KJ04 (gas 3.7) detroit true trac .....twice tires spinning grabed traction and broke second time had diff coller
FastTRX (gas 3.7) open diff.......Hill climb one tire air borne then grabed..snap
jerbacher (gas 3.7) open diff..245/75/16 Goodyear MT/R..no esp......small amount of wheel spin just broke <post on second page>
AZ Scout - (CRD) open diff........front tire spun - took out the front diff
LIV42DY..(gas?) open diff.....climbing muddy hill

If anyone knows of others or can add any info to this list please do. Also if anyone knows more about the failures posted post that info also.

jsc7002 · **Posted:** Wed Feb 18, 2009 2:28 am

I think KJ04 has broken one too, every time Ive heard of one breaking it was when a front we=heel was spinning and suddenly got traction, just as you have posted.

Inc · **Posted:** Wed Feb 18, 2009 2:31 am

Didn't 2mopar_diesels just break his towing in reverse on pavement and he has a DTT I believe?

Back-n-Black · **Posted:** Wed Feb 18, 2009 2:37 am

Good stuff guys i added those to the list but i do not have any info for kj04? I will do a search, but keep the info coming!!

jsc7002 · **Posted:** Wed Feb 18, 2009 2:38 am

Inc wrote:

Didn't 2mopar_diesels just break his towing in reverse on pavement and he has a DTT I believe?

yeah poor guy it was even his first time off road and he has the DTT.

http://www.lostjeeps.com/forum/phpBB3/vie ... hp?t=40228

jsc7002 · **Posted:** Wed Feb 18, 2009 2:39 am

Back-n-Black wrote:

Good stuff guys i added those to the list but i do not have any info for kj04? I will do a search, but keep the info coming!!

his is right here:
http://www.lostjeeps.com/forum/phpBB3/vie ... highlight=

and he had a diff collar and some of the others that broke the front diff had a DTT so it doesnt matter what you do you can break it, you just have to wheel smart and be careful when you have a front wheel in the air.

tommudd · **Posted:** Wed Feb 18, 2009 2:40 am

jerbacher broke one as well, no locker wasn't spinning that much looked just like all the rest when we pulled it out

Back-n-Black · **Posted:** Wed Feb 18, 2009 2:52 am

Great info guys we will have a nice list going soon. But right now it looks like open and TT are about even for breakage leaving me thinking it makes no difference. But what about the Lock-rights and other lockers? I wish we had more info on people who have broke the diff with those in. Thoughts?

jsc7002 · **Posted:** Wed Feb 18, 2009 2:55 am

Back-n-Black wrote:

Great info guys we will have a nice list going soon. But right now it looks like open and TT are about even for breakage leaving me thinking it makes no difference. Thoughts?

I dont think it matters the D30a will break pretty much no matter what you do to it, just wheel smart and be extremely careful when a front wheel is in the air, and if you bust the D30a......SFA it!! :lol:

Back-n-Black · **Posted:** Wed Feb 18, 2009 2:57 am

jsc7002 wrote:

Back-n-Black wrote:

Great info guys we will have a nice list going soon. But right now it looks like open and TT are about even for breakage leaving me thinking it makes no difference. But what about the Lock-rights and other lockers? I wish we had more info on people who have broke the diff with those in.Thoughts?

I dont think it matters the D30a will break pretty much no matter what you do to it, just wheel smart and be extremely careful when a front wheel is in the air, and if you bust the D30a......SFA it!! :lol:

Wish i could afford that for sure! Sure looks great on the couple guys who have done it!

Inc · **Posted:** Wed Feb 18, 2009 3:03 am

Common variable is the driver.

and yeah I like my solution to the problem, I just need to get it under there. :roll:

tjkj2002 · **Posted:** Wed Feb 18, 2009 9:02 am

The D30A carrier is different from a regular D30 carrier,it is unknown if a lunchbox locker will or will not fit.

Right off the Aussie locker web page,they make it and they do not recommend it for fronts apps that do not have lockable front hubs or front axle disconnects.

Quote:

Front Axle Installations
The installation manual provided with your Aussie Locker contains information on proper front axle installations. The Aussie Locker works well in front axles for 4 Wheel Drive vehicles when they are installed in a vehicle with locking hubs or those equipped with front axle disconnect.

Under no circumstances should the Aussie Locker be installed in the front of a full- time 4 wheel drive vehicle.

To prevent damage to the drive line no four wheel drive vehicle should be driven on the highway with the front hubs locked and the 4 wheel drive engaged. The Aussie Locker in the front differential of a 4 wheel drive vehicle (excepting full-time 4WD), properly equipped and installed, provides dramatic off road traction and very good on-highway handling.

Oh and if anyone wants to try I have got a D30A carrier that I will part with for a small fee for you to test fit a lunchbox locker in.

ATXKJ · **Posted:** Wed Feb 18, 2009 11:32 am

for fails - don't for get AZ Scout - CRD - front tire spun - took out the front diff - load transferred to the rear - blew that too.

I would argue that the only front locker that should work is the ARB - and that's because you can turn it off.
the lunchbox lockers - don't turn off - you can't unlock the hubs - so you'd never be able to turn on the street.

Back-n-Black · **Posted:** Wed Feb 18, 2009 12:19 pm

ATXKJ wrote:

for fails - don't for get AZ Scout - CRD - front tire spun - took out the front diff - load transferred to the rear - blew that too.

I would argue that the only front locker that should work is the ARB - and that's because you can turn it off.
the lunchbox lockers - don't turn off - you can't unlock the hubs - so you'd never be able to turn on the street.

Any time 4 wheel drive is not engaged, or your not applying gas, the locker will be unlocked and thus turning on the street would be just like an open diff, although you might hear some racheting of the locker. Most people from Aussies web site say it is transparent on the road in 2wd.

The aussie locker is not recominded for ANY 4x4 without locking hubs, not just the Liberty and it has nothing to do with the diff not working. Or the locker not fitting. I think this is one of the personal preference things that has been taken as fact by to many people over time. I understand that a lot of people to not trust or prefer a autolocker (front or rear), but that is personal preference and not a fact that it will not work. Not saying that everyone needs to have one either it should be up to each persons uses and comfort behind the wheel.

An email to Richmond Gear about the fitment and use of the Lock-right in the Liberty reveals this.

Quote:

We are in process of having our wed-site redone with any and all changes to be made concerning issues like this. Once the web-site changes are complete, the Liberty will be listed.

I wish we could find some of these threads where people have blown there diff using Lunch boxs and lockers in the front.

jsc7002 · **Posted:** Wed Feb 18, 2009 12:23 pm

Back-n-Black wrote:

I wish we could find some of these threads where people have blown there diff using Lunch boxs and lockers in the front.

I dont think anyone has used a lunchbox locker in the front of the KJ, least not on this forum.

Back-n-Black · **Posted:** Wed Feb 18, 2009 12:29 pm

jsc7002 wrote:

Back-n-Black wrote:

I wish we could find some of these threads where people have blown there diff using Lunch boxs and lockers in the front.

I dont think anyone has used a lunchbox locker in the front of the KJ, least not on this forum.

Well then why do posts that say "Don't do that it will blow the front diff" or "you can't because it puts added shock into the diff and destroys it faster" come from? Hear say and internet folk lore?

Guest · **Posted:** Wed Feb 18, 2009 12:30 pm

So then how do we know that it will blow it up, like was posted earlier?

There's too much theory in this thread and not enough hard evidence.

jsc7002 · **Posted:** Wed Feb 18, 2009 12:34 pm

Back-n-Black wrote:

jsc7002 wrote:

Back-n-Black wrote:

I wish we could find some of these threads where people have blown there diff using Lunch boxs and lockers in the front.

I dont think anyone has used a lunchbox locker in the front of the KJ, least not on this forum.

Well then why do posts that say "Don't do that it will blow the front diff" or "you can't because it puts added shock into the diff and destroys it faster" come from? Hear say and internet folk lore?

I highly doubt that it will work in one and not cause problems, plus some people dont want or trust the lunchbox lockers, like me which is why I have the DL instead of the Powertrax no-slip or the Aussie. I wouldnt mind seeing someone try it just to see what happens so then we really would know the answer, but I dont know very many people wanting to risk their front diff since they are expensive and DC doesnt make them any more, so you would have to pull one from a salvage yard.

Discussion of d30a fitments

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