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  #13  
Old 12-19-2012, 09:20 PM
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Re: WK front ELSD on WK2?

Quote:
Originally Posted by ColdCase View Post
The current ELSD locks up 95-99%, so it acts much more a locker than limited slip. So when you activate (turn on the power) the diff will be 99% locked, turn off the power, the diff will be open. No such thing as limited slip unless you modulate the power to the motor. Thats just how the recent system works.
this was the locker I was speaking of , I have owed 3 of them and can vouch for their operation

Leading Manufacturer of Traction Enchancing Differentials & Planetary Drives - Auburn Gear


The clutch packs work as a limited slip until the power 12v is supplied to the electromagnet , which holds the packs together so they do not slip
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  #14  
Old 12-19-2012, 09:24 PM
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Re: WK front ELSD on WK2?

So thats what is in the later WK front diff?
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  #15  
Old 12-19-2012, 09:25 PM
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Re: WK front ELSD on WK2?

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Originally Posted by ColdCase View Post
The carrier may be the same, but from the drawings I've seen, there is a clutch pack that fits over the axle and attaches to the carrier and motor for the ELSD as well as more axle splines. I don't think the conventional diff housing has the room for the clutch pack. The Y2010 front housings have different part numbers, so does the carrier assembly. Dunno the real differences. Sounds like someone needs to take a couple apart and see what could be pieced together.
The replacement would have to be close ( that why the need to reshim) . It would be the same as if it would be installed in a dana 30,44 or ford 9" . I am unsure if they make one for this particular axle assembly though .
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  #16  
Old 12-19-2012, 09:28 PM
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Re: WK front ELSD on WK2?

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Originally Posted by ColdCase View Post
So thats what is in the later WK front diff?

I am not sure , that would take some research on either DANA/Splicers site or even some of the manuals.

It would take a bit to figure out. I will try to do the research tomorrow .

I believe some came with E-locker and some had ( I think they are called ) Varalock .
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Old 12-19-2012, 09:34 PM
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Re: WK front ELSD on WK2?

This is what the WK QD diffs look like. The WK fronts may be the Eaton E-Locker, not sure if they ever switched from hydraulic to electric. The older QD I used vari-locks.
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File Type: jpg quadradrive_major.jpg (32.4 KB, 19 views)
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Old 12-19-2012, 09:39 PM
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Re: WK front ELSD on WK2?

It almost looks like it ,Its Close to the same design as the ECTd . The difference is the spiders on on the opposite side of the clutch pack and instead of the magnet they use a motor .

I would bet, unless its a totally new axle design, They would fit. We would need with of both carriers and circumference
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Old 12-19-2012, 09:46 PM
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Re: WK front ELSD on WK2?

according to CRown the Electric locker was started in 2007-2009 Part 4b



Front Axle MODEL 200mm

I will look more into it In the morning , I should just go out and look for a wire under mine,lol I have the QDII lol

I vaguely remember something about them using the vari-lok in the first few years while they worked out the bugs with the e locker , It seems to also coincide with the integration of the ESP .
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Old 12-19-2012, 10:05 PM
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Re: WK front ELSD on WK2?

It seems that the WKs used gerodisc limited slip and lockable diffs, where the WK2 now uses a electric motor controlled rear diff, there is no limited slip feature built into the Diff itself, but the traction controller can vary the clutch pack pressure to have the same effect. Works the same way as the transfer case.

The Gerodiscs have larger bearings and at least need larger races within the axle housing... thats why they are not interchangeable on the WK. Dunno the feasibility of putting one into the WK2 housing.

"Eaton’s EGerodisc™ electronic slip differentials made its commercial debut on the 2005 Jeep® Grand Cherokee, and were used through 2010 as well as on the Commander.

EGerodisc™ is a hydraulically-operated electronically controlled limited slip differential that is capable of providing variable torque up to full axle lock, helping to maximize traction when needed. The EGerodisc™ can be used as a stand-alone product that provides ultimate traction control, or it can be integrated with ABS or stability control packages to also provide enhanced vehicle dynamics. Be sure to ask your dealer if your vehicle has an Eaton differential.

------
From the service manual:

OPERATION

A gerotor pump (1) creates oil flow through the filter (4) whenever left and right wheels spin at different speeds and the solenoid valve is activated. The oil flow is restricted by a Pressure Regulating Valve (PRV) to build oil pressure. Pressurized oil is then fed to a piston (2) chamber. The piston compresses the clutch pack (3) providing additional torque to the lower speed wheel.

When the antilock brakes are activated the differential solenoid is switched off and pressure is bleed off the clutch pack"
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  #21  
Old 12-20-2012, 04:51 AM
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My understanding is the WJ QD used the gerotor pump, the WK QD II used an electric version and then they dropped the front diff from the WK2 version of QD II.

IIRC, the WJ also had sold axles.

-john
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Old 12-20-2012, 08:17 AM
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Re: WK front ELSD on WK2?

EGerodisc™ is a hydraulically-operated electronically controlled limited slip differential that is capable of providing variable torque up to full axle lock, helping to maximize traction when needed. The EGerodisc™ can be used as a stand-alone product that provides ultimate traction control, or it can be integrated with ABS or stability control packages to also provide enhanced vehicle dynamics. Be sure to ask your dealer if your vehicle has an Eaton differential.


This is also a old method of locking up a Limited slip in the older axles such as in the WJ,Zj, Xj, Tj,Yjs etc. I have used it when We Rock crawled . Just to clearify .... If you press the brake slightly and give it some gas then you can force the limited slip to lock up

My understanding is the WJ QD used the gerotor pump, the WK QD II used an electric version and then they dropped the front diff from the WK2 version of QD II.

IIRC, the WJ also had sold axles.

-john


The Wk2 still has a diff., you still need something to go from a Verticial rotation ( front drive shaft ) to a horizontal rotation ( the front CV's) . the major difference in going from a straight axle to cv's is ride comfort . The straight axle is stronger but does not move as "freely" as a independent CV system
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  #23  
Old 12-20-2012, 08:28 AM
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Re: WK front ELSD on WK2?

here is a video showing how the EGerodisc™ works






and just for good measure here is a vid on the Eaton's Elocker

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Old 12-20-2012, 08:48 AM
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Re: WK front ELSD on WK2?

While I was in bed last night I got to thinking about this , so I did a search on Randy's Ring and Pinion ( I believe they are the leading authority in the diff. market )

I entered in the 2012 jeep Grand Cherokee and here is what came up on their parts search

C200 IFS
2005-up Grand Cherokee 06-up Commander

Diff Wizard


so some of the parts ,If not all maybe interchangeable . This is due to it being the same axle ,there for , should accommodate the later model WK ELECTRIC lockers
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