New Z Automotive things coming

[hazards280]

I remote started my Jeep with the fob last night to go to town for supper. On our way back I noticed that it was activating the MDS.

Somehow my "No Limitz" device had been disabled. I'm not sure if it's related to the remote start or not, and turning it back on worked.

Just a heads up.

I had a similar issue occur on one of the first few starts after install. I double checked all my connections, re-enabled the NoLimitz on the steering wheel once more, and it has been working well ever since.

 

[sbrimer]

I am currently in Moab and have encountered a problem, well challenge, with the No Limitz.

I made the drive from Pensacola, Florida to Gallup, New Mexico, 1,430 miles, and 99% of this portion of the Moab trip was interstate. I left the No Limitz off and the MDS performed as normal.

I left the interstate and traveled from Gallup, to Kayenta, AZ to Moab, another 326 miles. This portion of the trip, I turned the No Limitz on and the MDS never activated. I loved it and the V8 ran in a manner that I expected a V8 to run.

Here lies the problem.

I started riding trails in Moab and the Jeep did not perform very well off road. 4H (4H Part Time) took a lot of effort and did not seem to work very well. The Jeep was sluggish and just didn't respond to throttle input much at all. It felt as if I was pulling a 3,000 pound trailer. It sucked to say the least.

I shifted to 4L and the Jeep performed well, but was unpredictable. Well, is not a good description, just OK, is better. Sometimes, a lot of throttle was required and sometimes no so much. The same thing occurred with engine braking in both 4H and 4L. It was just really strange.

The main problem was the Select Speed Control (the off road cruise control) would not function at all. Well, it sort of did. It would only function as a downhill descent control and would not function AT ALL in any manner that required a forward motion that wasn't led by gravity.

This has something to do with the adjustment in the torque management within the No Limitz.

I turned off the No Limitz so the MDS would function, and the Jeep performed amazing off road, including the Select Speed Control. The way I expected.

I understand that MDS does not activate in 4WD, but if you activate the No Limitz, you must turn it off when you use 4H or 4L, or you will encounter some problems.


On another thought, if you have a Tazer and you turn force RWD "on" so your Jeep is only operating in 2WD and you shift to 4H or 4L, you will still not have 4 wheel drive. When force RWD is on, no matter what position your transfer case is in, including your front locker, your front axle is not recognized by the Jeep and nothing happens.

You simply can't turn the Force RWD "off" and then everything will be recognized. You must shift back into 4Auto, and then shift the transmission to either park or neutral and then turn off the force RWD. All of the 4 wheel drive system will now work properly.

I know this because this happened to me on the side of a hill on Fins and Things, north. Kenny's Climb.

 

[Doc392]

I am currently in Moab and have encountered a problem, well challenge, with the No Limitz.

I made the drive from Pensacola, Florida to Gallup, New Mexico, 1,430 miles, and 99% of this portion of the Moab trip was interstate. I left the No Limitz off and the MDS performed as normal.

I left the interstate and traveled from Gallup, to Kayenta, AZ to Moab, another 326 miles. This portion of the trip, I turned the No Limitz on and the MDS never activated. I loved and the V8 ran in a manner that I expected a V8 to run.

Here lies the problem.

I started riding trails and the Jeep did not perform very well off road. 4H (4H Part Time) took a lot of effort and did not seem to work very well.

I shifted to 4L and the Jeep performed well, but was unpredictable. Sometimes, a lot of throttle was required and sometimes no so much. The same thing occurred with engine braking in both 4H and 4L. It was just really strange.

The main problem was the Select Speed Control (the off road cruise control) would not function at all. Well, it sort of did. It would only function as a downhill descent control and would not function AT ALL in any manner that required a forward motion that wasn't led by gravity.

This has something to do with the adjustment in the torque management within the No Limitz.

I turned off the No Limitz so the MDS would function, and the Jeep performed amazing off road, including the Select Speed Control.

I understand that MDS does not activate 4WD, but if you activate the No Limitz, you must turn it off when you use 4H or 4L, or you will encounter some problems.


On another thought, if you have a Tazer and you turn force RWD on so your Jeep is only operating in 2WD and you shift to 4H or 4L, you will still not have 4 wheel drive. When force RWD is on, no matter what position your transfer case is in, including your front locker, your front axle is not recogized by the Jeep and nothing happens.

You simply can't turn the Force RWD off and then everything will be recogized. You must shift back into 4Auto, and then shift the transmission to either park or neutral and then turn off the force RWD. All of the 4 wheel drive system will now work properly.

I know this because this happened to me on th side of a hill on Fins and Things, north. Kenny's Climb.

Send your findings to Z-automotive!

 

[Cali392JL]

I started riding trails in Moab and the Jeep did not perform very well off road. 4H (4H Part Time) took a lot of effort and did not seem to work very well. The Jeep was sluggish and just didn't respond to throttle input much at all. It felt as if I was pulling a 3,000 pound trailer. It sucked to say the least.

What is 4H part time on the 392?

 

[EBYCREEK]

What is 4H part time on the 392?

Places like Moab should be mostly 4LO. The computer locks the clutches in part time mode. Stops the slippage that is normally allowed when in 4HI Auto.

 

[Cali392JL]

Places like Moab should be mostly 4LO. The computer locks the clutches in part time mode. Stops the slippage that is normally allowed when in 4HI Auto.

I totally agree. Moab should be done in four low. The reason I asked about four high is that the original poster stated that his vehicle was driving fine on the road and for high, but when he was in 4 hi off-road and called it 4 hi part time, problems started happening. I didn't think there was anything different driving in 4 hi on the road or off road, with the exception you might use your lockers for off-road plus.

I am particularly interested in trying to understand if the Zautomotive "no limits" causes problems when wheeling as stated above. I have installed it on my vehicle and have had zero problems, but have not taking it off road yet and I am headed to the Rubicon soon and don't want to have any problems.

 

[Overkill]

What is 4H part time on the 392?

Jeep calls 4H and 4L part time because you have to switch in to them and they aren't full time like the 1974 Chevy Cheyenne that I have that only has Hi Loc - Hi - N - Lo - Lo Loc. Because there is a two wheel drive option, even though you can't select it via the shifter on the 392, the 4-wheel drive options have to be called part time.

 

[ParadigmDawg]

I am currently in Moab and have encountered a problem, well challenge, with the No Limitz.

I made the drive from Pensacola, Florida to Gallup, New Mexico, 1,430 miles, and 99% of this portion of the Moab trip was interstate. I left the No Limitz off and the MDS performed as normal.

I left the interstate and traveled from Gallup, to Kayenta, AZ to Moab, another 326 miles. This portion of the trip, I turned the No Limitz on and the MDS never activated. I loved it and the V8 ran in a manner that I expected a V8 to run.

Here lies the problem.

I started riding trails in Moab and the Jeep did not perform very well off road. 4H (4H Part Time) took a lot of effort and did not seem to work very well. The Jeep was sluggish and just didn't respond to throttle input much at all. It felt as if I was pulling a 3,000 pound trailer. It sucked to say the least.

I shifted to 4L and the Jeep performed well, but was unpredictable. Well, is not a good description, just OK, is better. Sometimes, a lot of throttle was required and sometimes no so much. The same thing occurred with engine braking in both 4H and 4L. It was just really strange.

The main problem was the Select Speed Control (the off road cruise control) would not function at all. Well, it sort of did. It would only function as a downhill descent control and would not function AT ALL in any manner that required a forward motion that wasn't led by gravity.

This has something to do with the adjustment in the torque management within the No Limitz.

I turned off the No Limitz so the MDS would function, and the Jeep performed amazing off road, including the Select Speed Control. The way I expected.

I understand that MDS does not activate in 4WD, but if you activate the No Limitz, you must turn it off when you use 4H or 4L, or you will encounter some problems.


On another thought, if you have a Tazer and you turn force RWD "on" so your Jeep is only operating in 2WD and you shift to 4H or 4L, you will still not have 4 wheel drive. When force RWD is on, no matter what position your transfer case is in, including your front locker, your front axle is not recognized by the Jeep and nothing happens.

You simply can't turn the Force RWD "off" and then everything will be recognized. You must shift back into 4Auto, and then shift the transmission to either park or neutral and then turn off the force RWD. All of the 4 wheel drive system will now work properly.

I know this because this happened to me on the side of a hill on Fins and Things, north. Kenny's Climb.

That's enough for me, I was only wanting it if there truly is torque limitation/management when in 4l and this would prevent it. Looks like I can just skip it.

 

[MDrums]

Too many issues going on I am reading on various places on line with this mod. Glad I didn’t get it…I get very frustrated with things like this and do not like being a test subject for free.

No Limitz is not ready for prime time. Keeping my 392 stock…because it just works best that way

 

[Cali392JL]

Jeep calls 4H and 4L part time because you have to switch in to them and they aren't full time like the 1974 Chevy Cheyenne that I have that only has Hi Loc - Hi - N - Lo - Lo Loc. Because there is a two wheel drive option, even though you can't select it via the shifter on the 392, the 4-wheel drive options have to be called part time.

@ovekill, thanks for clarifying the 4H/4L. I am anxious for ZAutomotive to chime in on the reported off road issues not above. They are on this thread and should be getting notified. I have it installed and have been very happy with it in 4H so far with about 800 miles. I hope to be happy with it at the Rubicon in a few weeks as well and hope it eliminates the rev limiter and traction control on slippery surfaces that the stock system has. I will report after the trip.

 

[ParadigmDawg]

@ovekill, thanks for clarifying the 4H/4L. I am anxious for ZAutomotive to chime in on the reported off road issues not above. They are on this thread and should be getting notified. I have it installed and have been very happy with it in 4H so far with about 800 miles. I hope to be happy with it at the Rubicon in a few weeks as well and hope it eliminates the rev limiter and traction control on slippery surfaces that the stock system has. I will report after the trip.

So you do notice the rev limiter and traction control in 4l?

 

[Cali392JL]

So you do notice the rev limiter and traction control in 4l?

 

[Cali392JL]

I personally have not had a problem with traction control, or the rev limiter in 4L, but I have a friend that was in snow in his 392 wrangler and was not able to rev about 4000 RPM I believe, it might've been 3000 RPM while he was spinning the tires on snow. I think I could probably test the rev limiter even in neutral as I'm pretty sure you cannot rev the engine completely in neutral and perhaps the no limits removes that also.

 

[guruman]

I am currently in Moab and have encountered a problem, well challenge, with the No Limitz.

I made the drive from Pensacola, Florida to Gallup, New Mexico, 1,430 miles, and 99% of this portion of the Moab trip was interstate. I left the No Limitz off and the MDS performed as normal.

I left the interstate and traveled from Gallup, to Kayenta, AZ to Moab, another 326 miles. This portion of the trip, I turned the No Limitz on and the MDS never activated. I loved it and the V8 ran in a manner that I expected a V8 to run.

Here lies the problem.

I started riding trails in Moab and the Jeep did not perform very well off road. 4H (4H Part Time) took a lot of effort and did not seem to work very well. The Jeep was sluggish and just didn't respond to throttle input much at all. It felt as if I was pulling a 3,000 pound trailer. It sucked to say the least.

I shifted to 4L and the Jeep performed well, but was unpredictable. Well, is not a good description, just OK, is better. Sometimes, a lot of throttle was required and sometimes no so much. The same thing occurred with engine braking in both 4H and 4L. It was just really strange.

The main problem was the Select Speed Control (the off road cruise control) would not function at all. Well, it sort of did. It would only function as a downhill descent control and would not function AT ALL in any manner that required a forward motion that wasn't led by gravity.

This has something to do with the adjustment in the torque management within the No Limitz.

I turned off the No Limitz so the MDS would function, and the Jeep performed amazing off road, including the Select Speed Control. The way I expected.

I understand that MDS does not activate in 4WD, but if you activate the No Limitz, you must turn it off when you use 4H or 4L, or you will encounter some problems.


On another thought, if you have a Tazer and you turn force RWD "on" so your Jeep is only operating in 2WD and you shift to 4H or 4L, you will still not have 4 wheel drive. When force RWD is on, no matter what position your transfer case is in, including your front locker, your front axle is not recognized by the Jeep and nothing happens.

You simply can't turn the Force RWD "off" and then everything will be recognized. You must shift back into 4Auto, and then shift the transmission to either park or neutral and then turn off the force RWD. All of the 4 wheel drive system will now work properly.

I know this because this happened to me on the side of a hill on Fins and Things, north. Kenny's Climb.

FWIW, I took mine out this evening to check the livestock. My "no-Limitz" was turned on, and I disabled the force 2wd feature of the taser. Everything, including the Select Speed control functioned without a problem. I didn't really have any difficult terrain to cover, but everything worked as expected, lots of power, lockers, speed select.... all pretty drama free.

On a related note, the. Select Speed Control is nearly completely useless, especially at the higher speed selections.... I have no viable use case for revving the engine at 4k going 5mph, getting 1mpg. Be9ng able to select higher gears to keep the revs low and/or higher speeds would be really helpful/useful.

 

[ParadigmDawg]

FWIW, I took mine out this evening to check the livestock. My "no-Limitz" was turned on, and I disabled the force 2wd feature of the taser. Everything, including the Select Speedf control functioned without a problem. I didn't really have any difficult terrain to cover, but everything worked as expected, lots of power, lockers, speed select.... all pretty drama free.

On a related note, the. Select Speed Control is nearly completely useless, especially at the higher speed selections.... I have no viable use case for revving the engine at 4k going 5mph, getting 1mpg. Be9ng able to select higher gears to keep the revs low and/or higher speeds would be really helpful/useful.

Someone go scream up a moderate trail with it on and then off and see if there is a factory limitation on torque.

 

[Whiskey Tango Foxtrot]

Would throw down some cash for something that disabled the TBM from tracking my location.

 

[guruman]

On my way t the hardware store today and the MDS kicked in.... I had to re-activate the No Limits again....

 

[casselmb]

On my way t the hardware store today and the MDS kicked in.... I had to re-activate the No Limits again....

Very odd. Mine hasn’t done that once since install. Probably 600-800 miles on it since.

 

[Robr651]

Got mine in as well. No real issues, except a broken piece of the PCM star connector. I guess you have to press the screwdriver INTO the gap to release the hidden clip, then pry it out of the slot. I managed to not break the lock though, so it still clips in just fine.

My pics of the star connector did not turn out, but here's the power connection to the HVAC panel.

The install was super easy and took maybe 5 minutes, unless you're like me and forgot what colors to look for on the star connector.

View attachment 36448

Maybe this is why yours is having issues / working intermittently? Star connector screwed up / not seated?

 

[guruman]

Maybe this is why yours is having issues / working intermittently? Star connector screwed up / not seated?

I don't think so, but maybe. The broken star connector goes to the PCM.... if it were not seated (it does still seat and lock) the PCM would be giving me issues instead of just the No Limitz.

So far there's been no other issue.... just twice it was somehow turned off.... turning it back on was easy enough. I expect once they get around to updating it, this minor issue will go away.