[Sarge]

Its not so much hacking, Unless the Jeep uses GPEC5 PCM HP Tuners has supported tuning jeeps for a long time. 2015+ have their PCMs locked but its easy, HP Tuners unlocks your original or you buy a used one and get it unlocked.

Security has already been "hacked" on Wranglers, just not one ones with GPEC5, so that would be some vehicles starting in 2021 (All 4xe's are GPEC5)

I know very little about the security protocols they're using, but one of the things I recall reading about the ZF eLSD and transmission (and I assume they make the transfer case?) is that they were touting their 'high security network'. What it is I have no idea, but they're proud of whatever they did to that end apparently. My cursory knowledge of what manufacturers have been doing throughout the vehicles is only that they've all been taking increasingly serious steps as they've added more and more autonomous features - increasing security in the interest of safety and liability.

 

[Tyler-98-W68]

The transfer case is not made by ZF it's made by Magnapower, their transfer cases are used in Jeeps and GM trucks quite frequently

 

[MTMark]

I’m just pleased that my QT1 Jeep is a little more capable than I thought. I thought the single speed transfer case was just an open differential. I am pleased that it has clutch packs that give it the ability to tighten up substantially in certain modes. My experience with mud/sand mode is that it actually binds up when making a u-turn on the gravel culdesac at the end of my road. I agree with Sarge that snow mode is tuned for neutral (boring) handling in all aspects. (Believe me, I appreciate the boring handling of snow mode when traveling on icy highways.). OP, thanks for the find on the transfer case specifications.

 

[Sarge]

The transfer case is not made by ZF it's made by Magnapower, their transfer cases are used in Jeeps and GM trucks quite frequently

I'm surprised, with the amount of computerization, that ZF doesn't make the transfer case, given its core involvement in the 'terrain' modes.

 

[Tyler-98-W68]

The selec terrain mode programming is really a feature available on the transfer case, jeep just enables that on the software side of things.

Example, 4H Auto or "Auto 4x4" on GM trucks, is no different than what the Only setting on QT1 vehicles, jeep just markets and calls it differently.

Same thing how MP transfer cases used in trucks have a 2H function..........but that function isn't enabled in most Jeeps.

MP3022 is used in WK2 grand Cherokees, it's also used in The JL Wranglers 2018+

WK2 = no 2H mode
JLU = 2H Mode

Its all programming and how jeep wants the vehicle to performan.

In the JLU 4U Auto stays in RWD mode until:

1. Slippage
2. Throttle input
3. Pitch/Yaw + a bunch of other variables

In the WK2 it functions similar but different

1. Low speeds it send power to the front axle and when stopped
2. When accelerating gently it sends power to the front axle and then gradually backs off going to RWD
3. Harsh acceleration send power to the front axle
4. Pitch/Yaw + A bunch of other variables

So in 2 different Jeep vehicles they use the same transfer case but through the DTCM they function a bit differently.

As for the MP3015, unfortunately neither J-Scan or OBDlink which I use to monitor the DTCM support the WL yet so I need to wait for support before I can see the DTCM and how it's applying the clutches ect.

 

[Sarge]

The selec terrain mode programming is really a feature available on the transfer case, jeep just enables that on the software side of things.

Example, 4H Auto or "Auto 4x4" on GM trucks, is no different than what the Only setting on QT1 vehicles, jeep just markets and calls it differently.

Same thing how MP transfer cases used in trucks have a 2H function..........but that function isn't enabled in most Jeeps.

MP3022 is used in WK2 grand Cherokees, it's also used in The JL Wranglers 2018+

WK2 = no 2H mode
JLU = 2H Mode

Its all programming and how jeep wants the vehicle to performan.

In the JLU 4U Auto stays in RWD mode until:

1. Slippage
2. Throttle input
3. Pitch/Yaw + a bunch of other variables

In the WK2 it functions similar but different

1. Low speeds it send power to the front axle and when stopped
2. When accelerating gently it sends power to the front axle and then gradually backs off going to RWD
3. Harsh acceleration send power to the front axle
4. Pitch/Yaw + A bunch of other variables

So in 2 different Jeep vehicles they use the same transfer case but through the DTCM they function a bit differently.

As for the MP3015, unfortunately neither J-Scan or OBDlink which I use to monitor the DTCM support the WL yet so I need to wait for support before I can see the DTCM and how it's applying the clutches ect.

Does Jeep also apply their own programming of ZF's eLSD and transmission?

I also wonder how much of the programing Jeep actually does, or do they tell the supplier what attributes they want, and the supplier creates the code? Presumably because the 'terrain' system gives the orders, Jeep engineers decide how they want those parts to behave, and set the parameters.

What I don't get is why the WL eLSD seems so much slower to engage (vs WK2) in the user videos we've seen. I'll be curious to test my new Hemi SR's eLSD to see if it is also that slow. I don't like the idea of the 'delayed engagement' at all. If you're towing a camper up in the boondocks, or towing a boat up a gravel ramp, etc, the last thing you want is wheelspin of any kind while the computer waits before begrudgingly deciding 'fine, you're digging a hole now, I guess I'll activate the diff'.

 

[MTMark]

I found info/specs that say 2021 limited has the MP3010 transfer case (which I think is similar to the MP3015-perhaps less beefy). It has electronic controlled clutch packs also. The 2010 is the non electronic open differential. I understand the 3010 was used in SRT grand cherokees.

 

[MTMark]

Sorry to repeat myself but I am very happy to know that my Jeep can “lock” up the transfer case in sand/mud and snow modes. I was frankly a little jealous that my wife’s Lexus RX350 (and my son’s Subaru Crosstrek) have little buttons that lock the center differential. Makes me that much more confident in my WL QT1 Jeep despite not having low range. (I am coming from a AWD BMW X5 then an AWD Yukon Denali (neither had low range) and the WL feels much more capable than both of them.) My last rig with low range was a classic XJ Cherokee and I never used it. (I mainly use 4WD for going to the ski hill in the winter and trailheads/fishing spots in the summer.)

 

[Tyler-98-W68]

A very unscientific test.

Stock tires, Goodyear Wrangler Forterra HL
ESP Partial Off.

Was doing my best to get stuck and not be able to make it up the Icey incline.

No issues, no delay sending power to the rear, worked just fine even without having a "snow" setting that a selec terrain WL limited would have with the same transfer case.

Sadly J-Scan and OBDlink can't monitor the transfer case yet so patiently waiting on support to see what's going on.

 

[Crosshairs]

Just as an FYI, on the WL the DTCM is integrated into the T-case shift motor

 

[Pioneer4x4]

A very unscientific test.

Stock tires, Goodyear Wrangler Forterra HL
ESP Partial Off.

Was doing my best to get stuck and not be able to make it up the Icey incline.

No issues, no delay sending power to the rear, worked just fine even without having a "snow" setting that a selec terrain WL limited would have with the same transfer case.

Sadly J-Scan and OBDlink can't monitor the transfer case yet so patiently waiting on support to see what's going on.

No matter what was going on, the systems and the tires worked great clawing up that ice, nice video, thanks.

 

[Tyler-98-W68]

After trying to find out more about this transfercase, the only thing i've come across as this. I think this might be the 3015c transfer case Jeep uses in the WL

 

[MTMark]

Here is an article about the MP3010 transfer case for GM applications written from a mechanics perspective.

Gears Magazine - Magna's MP 3010 Transfer Case

The Magna Powertrain model 3010 (MP 3010) transfer case (figure 1) has been the heart of GM’s four-wheel drive truck line since it was introduced in 2011 to replace the New Venture Gear transfer case system. The MP 3010 transfer case is an electronically controlled, one-speed automatic, active...

gearsmagazine.com

I think the 3015 is similar, just beefier.

 

[MTMark]

Here is another article on the nuts and bolts of the 3010 case.

Gears Magazine - A Look Inside the MP3010 Transfer Case

In previous issues of Keep Those Trannys Rolling, we looked at the Magna Performance MP3010 transfer case control system and the diagnostic routines needed to keep this four-wheel drive system rolling down the road. In this issue, we’re going to look inside the transfer case, to see how to...

gearsmagazine.com

 

[Tyler-98-W68]

It may not be the Ecomax T-case but possibly this one,

Either way it's not a MP3010, because the MP3010 always had a fixed ratio of F/R power and no front axle disconnect.

I'm going to have to jack my WL up and take a peak at the transfer case

 

[MTMark]

Looks like a nice system. If I remind myself that my grand Cherokee is not supposed to be a wrangler, it’s a great system. Long road trips driven in safety and in style. Gets to the ski hill in a snowstorm. Goes to all the trailheads and fishing spots. My dad has a rubicon I can borrow if I want to bounce all over the place. Frankly, I usually think to myself that I’d rather walk after an hour of bouncing around, it’s so uncomfortable. Also, in the winter, the rubicon is not that safe with the part time 4wd that you can’t leave on all the time because of the mixed dry pavement, ice and snow (not to mention the mud terrain tires that are horrible on the ice). Give me my Grand Cherokee for all but the worst conditions and I’ll be happy.

 

[Tyler-98-W68]

Looks like a nice system. If I remind myself that my grand Cherokee is not supposed to be a wrangler, it’s a great system. Long road trips driven in safety and in style. Gets to the ski hill in a snowstorm. Goes to all the trailheads and fishing spots. My dad has a rubicon I can borrow if I want to bounce all over the place. Frankly, I usually think to myself that I’d rather walk after an hour of bouncing around, it’s so uncomfortable. Also, in the winter, the rubicon is not that safe with the part time 4wd that you can’t leave on all the time because of the mixed dry pavement, ice and snow (not to mention the mud terrain tires that are horrible on the ice). Give me my Grand Cherokee for all but the worst conditions and I’ll be happy.

Rubicon's (actually a few models of the JL) have Full time 4x4 systems.

My rubicon 4xe had it, MP3022 Transfer case, same as what the WK2 with QT2 used.

 

[Pioneer4x4]

Rubicon's (actually a few models of the JL) have Full time 4x4 systems.

"Full Time 4X4" is basically AWD with some type of slip/differential in the center, you can leave it in Full Time or Always without major wear issues.
"Part Time 4X4" is "Real 4X4" with locked center differential, and you cannot drive on pavement without destroying tires/ CV/Axel joints/differentials/transfercase.
Many Jeeps have one or the other or both. All Jeeps with low range are Part Time in low range.
Old Command Trac were Part Time only, Select Trac was Full time in 4H, and part time in 4L, then they added both to 4H

 

[Tyler-98-W68]

"Full Time 4X4" is basically AWD with some type of slip/differential in the center, you can leave it in Full Time or Always without major wear issues.
"Part Time 4X4" is "Real 4X4" with locked center differential, and you cannot drive on pavement without destroying tires/ CV/Axel joints/differentials/transfercase.
Many Jeeps have one or the other or both. All Jeeps with low range are Part Time in low range.
Old Command Trac were Part Time only, Select Trac was Full time in 4H, and part time in 4L, then they added both to 4H

I'm very well aware how transfer cases works,

MP3022 Transfer Case operation and monitoring with J-Scan

This post is to give everyone a little bit betting understanding of how the Transfer case and 4x4/AWD drivetrain works in the 4xe (and other wranglers with the full time system). I’ve read lots of posts stating “Driving in full time 4x4 the vehicle drives so much better”. Well my testing shows...

www.4xeforums.com

 

[Pioneer4x4]

I'm very well aware how transfer cases works,

MP3022 Transfer Case operation and monitoring with J-Scan

This post is to give everyone a little bit betting understanding of how the Transfer case and 4x4/AWD drivetrain works in the 4xe (and other wranglers with the full time system). I’ve read lots of posts stating “Driving in full time 4x4 the vehicle drives so much better”. Well my testing shows...

www.4xeforums.com

You were stating the the Rubicon was Full Time, that has nothing to do with being a Rubicon, the Rubicon specific drivetrain is Part Time.
I was clarifying it for everyone that doesn't.