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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.
 

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Discussion Starter · #22 ·
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
 

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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.
 

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Discussion Starter · #25 ·
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.
 

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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'.
 

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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.
 

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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.)
 

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Discussion Starter · #29 ·
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.
 
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