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  #37  
Old 12-21-2012, 02:07 PM
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Re: WK front ELSD on WK2?

Available gear ratios -For those reading , alot of times you can find the Axle Ratio stamped on a plate held on by one of the Diff. cover bolts . Sadly , if your diff. fluid has been changed or repaired ,These tags often get thrown away


1997 - 2006 (WJ, WK) - Jeep Grand Cherokee


Axle Possible Axle Ratios
C200FE 3.07 3.55 3.73 -
C200F 3.07 3.55 3.73 -
C213R 3.21 3.55 3.73 -
C213RE 3.07 3.55 3.73 -
181 FBI (Dana 30) 3.07 3.55 3.73 4.10
186 FBI (1999-2004) 3.07 3.55 3.73 4.10
194 RBI (Dana 35) 3.07 3.55 3.73 4.10
198 RBI (1999-2004) 3.07 3.55 3.73 4.10
216 RBA (Dana 44) 3.55 3.73 - -
226 RBA (1999-2004) 3.55 3.73 - -
226RBI (2006) - 3.73 - -


2006 (XK) - Jeep Commander

Axle Possible Axle Ratios
C200FE 3.07 3.55 3.73 -
C200F 3.07 3.55 3.73 -
C213R 3.21 3.55 3.73 -
C213RE 3.07 3.55 3.73 -


for 2012

Axle
Possible Axle Gear Ratios
195FIA Front 3.07 3.47

215RII Rear 3.6L 3.07

225 RII Rear 5.7L 3.47

2011 Grand Cherokee

Front Differential Conventional; 7.7 inch ring gear diameter; ratios, 3.06:1 with V6, 3.47:1 with V8

Rear Differential
Conventional; 8.4 inch ring gear diameter on V6, 8.9 inch on V8.
Axle ratios, 3.06:1 3.6-liter engine; 3.47:1 5.7-liter engine

ELSD----differential Electronic limited-slip (late availability), optional on V8 4x4 with MP3022 transfer case;
Same ring gear diameter, 3.47:1 axle ratio
Attached Images
File Type: jpg 198RII Axle Tag 3.64 640.jpg (93.9 KB, 5 views)
File Type: jpg 198RIIAxle 640.jpg (103.0 KB, 7 views)
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  #38  
Old 12-21-2012, 03:27 PM
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Re: WK front ELSD on WK2?

The WK2 front pumpkin looks like it will be a bear to break apart, nothing like the C200. The pinion shaft is on the left (seal 10). Looks a lot like a Mercedes ML Diff. On the MLs you spend about 2 hours pulling the assembly out so you can take things apart on the bench. Wonder if there are any lockers for the ML....
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File Type: jpg FrontAxle.jpg (116.4 KB, 10 views)
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  #39  
Old 12-21-2012, 04:53 PM
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In all honesty , I can see why they are making you buy one unit if you are replacing it. I think they just left the aftermarket with a headache .

On the other hand its a lot smaller and lighter then pulling a whole 30 or 44 to install to regear, lol.

More smaller parts but much lighter

If I remember right the corvettes have been using this system for a while as well.

I hope the aftermarket will end up selling it like a 9" . You order just one big unit with what ever gears and locker , maybe offer a core charge for the old one

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  #40  
Old 09-17-2013, 09:16 PM
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Re: WK front ELSD on WK2?

Just signed up, First Post-
I know this is an old thread but im trying to find info on the Eaton EGerodisc.
My intended application is different and i will start another thread on it but just fishing for info here first

What i want to do is unique in that i want to fit an EGerodisc into a Dana44 in a 2007 Jeep JK Wrangler. As far as i know its never been attempted and i still dont know if its even possible to physically fit?

Operation wise as i understand it, the EGerodisc is always functioning detecting torque variance between the axels like any Gerotor Pump would, the addition of the Electric Solenoid is to turn its function OFF by releasing any build up in Hydraulic Oil Pressure purely for ESP reasons so the individual braking wont be hindered by a Diff trying to lock up!

Therefore it could be fitted with a switch and function similarly to a Manual Locker such as an E Locker the only difference is power is sent to Activate an E Locker, Power is Turned Off to Activate an EGerodisc.

EATON have been no help with Specs or even being able to buy one as the EGerodisc is for OEM not AfterMarket Sales! Even though they state it can be fitted to an ESP system or a Stand Alone System!
I actually thought that would mean they would supply it like a locker and reverse the Electric Solenoid valving action so Energising it would turn it ON not OFF.
I dont even know if they make 1, 2, 3, or 10 different model EGerodisc???

Its the Front Diff only i want to try this. Ive had it with Manual Type Lockers ARB Air Leakers! and ive Tried An Auto Locker (luchbox locker LOKKA) and hated that. I have had a True Track which is great but not a true locker and let me down in the hard core off roading i do (i.e. if you lift a wheel it will stop transferring torque the the wheel on the ground, it also will not transmit 100% to One wheel).

The EGerodisc seems perfect for me, if i can just get one to fit and some info i will definitely give it a go!
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Old 09-19-2013, 12:45 PM
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Re: WK front ELSD on WK2?

You would have to find a way to generate hydraulic pressure to lock the clutches. Normally pressure is generated only when there is a difference between L and R axle rotation. If you want lock full time, I think you would need an auxiliary hydraulic pump. An then use the control line to release pressure.

More recent electric lockers use a electric stepper motor to squeeze the clutch pack, giving a variable lock from 0 to 100%
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Old 09-19-2013, 07:44 PM
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Re: WK front ELSD on WK2?

[QUOTE=ColdCase;896298]You would have to find a way to generate hydraulic pressure to lock the clutches. Normally pressure is generated only when there is a difference between L and R axle rotation. If you want lock full time......

No i wasn't saying that at all, i want it to work as designed! not lock full time! If i wanted that id simply keep the ARB Locker i have now.
A gerotor pump creates oil flow whenever left and right wheels spin at different speeds and the solenoid valve is activated.
It will work as a variable Auto Locker when im Off-Road. I only mention turning it On & Off with a switch to stop it interfering with ESP braking On-Road,
A true Auto Locker like a Detroit Locker will not stop a wheel overrunning in an emergency ESP situation where the system maybe braking one wheel to limit oversteer for instance, but EGerodisc will interfere and stop a free running wheeling. As far as i know the only reason for that Electric Connection and the Addition of the Solenoid is to release any oil press build up so it doesn't interfere with ESP evasion situations and subsequent individual braking.



Quote:
Originally Posted by ColdCase View Post
More recent electric lockers use a electric stepper motor to squeeze the clutch pack, giving a variable lock from 0 to 100%

Your talking about a Torque Vectoring System, http://www.eaton.com/ecm/groups/publ.../ct_234157.pdf
The EGerodisc is not this but Eaton do have one. I don't believe the new WK2 has Torque Vectoring ELSD either, it would be difficult or near impossible to install a Torque Vectoring ELSD in a Stand Alone System i think it will need an ECU to function. Again a much simpler cheaper way would be a Manual Locker, but im not after that, i want the benefits of a manual locker with the convenience of full automation.
So for me i just need to know if it will physical fit in a Dana44 or not?

Eaton will not give me any info, if i could just get a spec sheet i could see if it would fit?
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Old 09-21-2013, 09:50 AM
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Re: WK front ELSD on WK2?

I understand how all that works, but misunderstood your question, sorry.

I think that it was mentioned earlier in the thread (maybe another thread), but WK2's non ELSD Diff housing is too small to house any gerotor or locker offered today (well those of a year ago) regardless of how you control them. The gerotor type used in previous WKs has larger bearings than the standard. Someone here looked at machining out the WK2 diffs to accept the larger bearings, but determined it would be much more cost effective just to trade in the WK2 for one with QD.

As you know, the QD's ELSD used by jeep is under control of a traction computer (in a separate module) which coordinates with the ESP program. It is not a stand alone dif. So simply swapping out the WK2's rear diff assembly is not going to do much good.
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  #44  
Old 09-30-2013, 08:26 AM
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What about the WJ's hydraulic diff? Might lend itself to stand-alone operation.

-john
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  #45  
Old 10-01-2013, 06:06 PM
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Re: WK front ELSD on WK2?

Quote:
Originally Posted by ccfoodog View Post
What about the WJ's hydraulic diff? Might lend itself to stand-alone operation.

-john
Too large to fit.
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Old 10-01-2013, 09:32 PM
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Interesting. I would have thought the WJ and JK diffs would have been similar sized.

-john
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Old 10-03-2013, 08:50 AM
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Re: WK front ELSD on WK2?

The WK2 diff housings are much different than the WK, WJ and JK housings. The WK have been using so called metric gear sets for awhile. The bearings of WJ and WK limited slip assembly diffs are larger than those w/o. The housings themselves are a lot different. I think ZF makes the WK2 diffs, which don't have a cover, you split the housing to service them.

Someone persistent with much machining, fabrication skill, and a large hammer may be able to do it, but just trading for an ELSD equipped WK2 is much less money and effort. Front ELSD in the WK2 doesn't buy you enough to make it worthwhile. Use some other vehicle where you have to have front lockers.
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Old 10-03-2013, 02:19 PM
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Re: WK front ELSD on WK2?

I second that!!!

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