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Go Back JeepForum.com > General Jeep Forums > Jeep Engineering - Q&A > 10/24 Q/A Session - Grand Cherokee

Savvy/Currie Aluminum Control ArmsROCK BOTTOM prices on LIFT KITS at Rockridge4wd!! WANT TO December Specials at Jeephut.com

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Unread 10-24-2007, 05:11 PM   #61
JeepEngineers
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Quote:
Originally Posted by oH2o
I really like the new location of the EVIC controls on the steering wheel on the 2008 models. However, there is one major flaw with how the menu choices are laid out. On prior models, one could access the menu and then scroll through all of the listings. Now, inexplicably, the Tire Pressure is on a separate "channel" apart from the other items. On this channel other listings will come up at random, but only one or two of them. Then, one must try and figure out how to get into the other mode to show the rest of the listings, and what happens is that you end up in the programming mode ("yes", "no" etc.). Very frustrating!

Common sense would dictate that the programming mode should be "hidden" or at least require a 2-button sequence so one does not end up in that mode all the time. The old system was SO much more intuitive, WHY did they make this change, and have there been other complaints?

I'm sorry to hear about your dissatisfaction with the evic controls. We will certainly take your remarks into consideration when developing new product. One of the reasons to divide up the evic into menus was to handle the increasing amount of information/ configurations available to you. It is very similar to a system used in our other Chrysler/ Dodge products. Thanks again for your valuable input.

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Unread 10-24-2007, 05:13 PM   #62
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Quote:
Originally Posted by Decipticon
Bottom line is reliability and simplicity. Sometimes you want things to be easier to work on and replace. As the owner of a 93 with the nv249 case, I would much rather have a part time case like the 231. As far as a bigger axle goes...bigger axles are stonger axles. No one here will hate you for giving us that. We like stronger things.
Couldn't agree more on the simplicity. The robustness of the larger axle does however counter the cries for better fuel economy. Larger, in this case, is not just heavier but less efficient.

For simplicity a fixed full time T-case is the most simple. But this system will leave you high and dry without something to control a slipping wheel. Brake traction or even better a coupling. The 245 is simply a 2 speed full time case with a wet clutch coupling to eliminate slip. I have a 242 in my XJ and am looking at putting a 249 case to have the simplicity full time and a coupling to control slip.
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Unread 10-24-2007, 05:13 PM   #63
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Quote:
Originally Posted by oH2o
On a prior model WK I had the EVSII security system and really liked it. Unlike other aftermarket systems, the Mopar version never once produced a false alarm, it worked flawless. I notice in the new 2008 Mopar catalog that the EVSII is not compatible with new 2008 models, probably due to the new ignition system. Will Mopar be coming out with an updated version for the 2008 models?
You are correct for Mopar is not offering the system for 2008. Slow sales of the prior model and the complexity of the new ignition, has forced Mopar not to offer a EVS kit for 2008.
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Unread 10-24-2007, 05:13 PM   #64
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Quote:
Originally Posted by JeepEngineers
While the standard "we cannot comment on future product" statement applies...

I would be remiss in not bringing up the advantages the IFS has on steering and handling. I think you'll find the IFS equiped WK will best the solid front axle WJ in most any offroad venue. Believe me we checked.

That said, the beam axle does make it easier to modify the vehicle and softens the occational contact with terrain. Can I interest you in a JK Unlimited.

I would like to see the parameters of that test, ill bet by simply removing the front swaybar on the wj it would win out. I also find it hard to believe that the ifs wk axle is stronger than the dana 30 (believe me i know the dana 30 is no champ, but ifs is inherently weak). If i wanted steering and handling I wouldnt be looking at a Jeep. Many of us around here modify (meaningfully) our vehicles and we want to give any input to make that easier for us.

I did look at the JK, however it does not have a diesel option, and the v6 is a little too underpowered for me. I also need more cargo room than the JK. Also...too many people have them...good for you ...bad for me lol.
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Unread 10-24-2007, 05:14 PM   #65
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The engine driven fan on my 4.7L 06' Laredo seems to run when it shouldn't and it is very loud and annoying. I have had the jeep for 2 months now and have been driving in 40-60 degree weather mostly. It randomly decides to run on cold start ups and continues to run for 10-15 minutes of driving eventually turning off. If I hold it in 1st or 2nd gear at a high RPM for a block or so the fan will disengage and remain off. If I completely warm up the engine at idle the fan will still run for 10-15 minutes after starting to drive. Sometimes when I start it up with a cold engine the fan won't come at all. I am used to other vehicle fans running with a cold engine but only for a block or so of normal driving. I have always guess that the fan is used to help load up a cold engine and accelerate the warm up proccess but this seems excessive.

Does this sound like normal behavior?
How does the fan engage, is it a viscus clutch or electric?

Thanks
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Unread 10-24-2007, 05:17 PM   #66
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Suggestions:

1. Less Chrome
2. Check Speedo calibration with GPS in MyGig, recalibrate speedo as necessary.
3. Front AND Rear Swaybar Disconnects. Automatic would be great, manual would be okay.
4. Already stated in a previous post, but allow storage of a 33" tire.
5. More headroom.
6. Add CB to MyGig. Or, add intermittent aux input mode to MyGig so I can use MyGig as my external speaker, but listen to music when no CB chatter.
7. Change in '08 to white lettering in the instrument cluster is great, but continued use of green-lighted controls thoughout the rest of the cabin (including MyGig) creates a disjointed look. You should really strive for lighting consistency (all white or all green).
8. Add ability in MyGig to choose display colors, not just brightness level.
9. Hopefully AEV will finally come out with this fix, but if not, provide correction for ESP problems caused by 4" SuperLift.


Questions:
1. What happens if you remove a damaged rear (or front) driveshaft to get you off the trail and home? (QDII eqipped WK) If this causes problems, how about a drive-home mode to disable some of the electronics, with a legal disclamer acceptance though MyGig?
2. I have '08 w/ 4.7L engine. I'm still trying to read though all the manuals so if this question is answered in the manuals, sorry for bringing up here... Is there a break-in period after which I shouldn't expect more power or fuel economy gains? (I'm basing this question off reports on the JK forum that say you need to put 1000 miles on the engine before you get the full power from the engine. By the way, so far the 4.7L Gen II is wonderful)
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Unread 10-24-2007, 05:18 PM   #67
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Quote:
Originally Posted by jeepinjunkie
How restrictive is the stock exhaust on the Hemi equiped Grand Cherokee?

About how much horespower might be gained by installing the Mopar cat-back, or one of the other cat-back exhausts available?
The stock system has been engineered to be a very low restriction exhaust. The Mopar performance system offers a "throatier" sound with a 7 to 10 horsepower gain. I am unaware if there has been a flow comparison stock vs. Mopar performance exhaust.
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Unread 10-24-2007, 05:22 PM   #68
oH2o
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Quote:
Originally Posted by JeepEngineers
I'm sorry to hear about your dissatisfaction with the evic controls. We will certainly take your remarks into consideration when developing new product. One of the reasons to divide up the evic into menus was to handle the increasing amount of information/ configurations available to you. It is very similar to a system used in our other Chrysler/ Dodge products. Thanks again for your valuable input.
It just seems odd that the TPMS was separated from everything else. But the main complaint is that is is much too easy to get into the config mode, I end up there all the time, and there is no logical way to get back to the other menu items, I find myself constantly hitting different buttons and eventually finding my way around. I have owned quite a few WJ/WK models over the years and it is very seldom that I need to go into the programming mode, maybe a couple times a year if that. It would be nice if the programming mode was made so that you would not constantly enter into it accidentally. Any chance that a future Flash update could fix this?
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Unread 10-24-2007, 05:23 PM   #69
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Quote:
Originally Posted by Arcticcat843
we have a 06 GC and the air bad light randomly goes on and off ( and dings) Any idea what could cause that? What should i do to fix it? We just don have the time to take it to the dealer not have it for a coupe days.

this might have already been said (im to lazy to read the other posts) but.....You should make a rubicon edition GC. Something with a little lift and some mud tires....maybe some e lockers and stuff.....I would buy one if you did
There are many components that go into making the safety system. Without reviewing your vehicle, it will be impossible to accurately diagnose. One suggestion would be to have your dealer look at the occupant classification system (if so equipped). Please be sure to take your vehicle to you local dealer soon for diagnostics. Please do not attempt to fix/modify your safety system on your own, it should only be serviced by your dealer.
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Unread 10-24-2007, 05:24 PM   #70
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Hi
Will there be more options on tire size programming for when someone does a lift and bigger tires. We fit star tech 20 in wheels that are back by jeep.
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Unread 10-24-2007, 05:28 PM   #71
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I am considering getting the Mopar Kicker upgrade components. On a recent chat session the SRT engineers posted that the upgraded amp was the same for 2006-2008 models. Being that the 2008 models use a whole new CAN bus system this cannot be the case. Do you have the part number for the 2008 amplifier and do you know when it will be available?

Speaking of Kicker, have you guys thought of finding a different supplier for your upgraded audio kits? It seems that since day one (2005 300C SRT8) Kicker has been plagued with delays and shortages, which continue to this day. If they can't supply the product it might be time to find a different company.
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Unread 10-24-2007, 05:29 PM   #72
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Quote:
Originally Posted by merlinTec
Hi
Will there be more options on tire size programming for when someone does a lift and bigger tires. We fit star tech 20 in wheels that are back by jeep.
The 20 inch wheel are not authorized by Jeep in any market. The Startech wheels are a MPC specific accessory. We do not offer tire size programming for tires that are not offered from Production.
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Unread 10-24-2007, 05:31 PM   #73
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Quote:
Originally Posted by TRZ
Suggestions:

1. Less Chrome
2. Check Speedo calibration with GPS in MyGig, recalibrate speedo as necessary.
3. Front AND Rear Swaybar Disconnects. Automatic would be great, manual would be okay.
4. Already stated in a previous post, but allow storage of a 33" tire.
5. More headroom.
6. Add CB to MyGig. Or, add intermittent aux input mode to MyGig so I can use MyGig as my external speaker, but listen to music when no CB chatter.
7. Change in '08 to white lettering in the instrument cluster is great, but continued use of green-lighted controls thoughout the rest of the cabin (including MyGig) creates a disjointed look. You should really strive for lighting consistency (all white or all green).
8. Add ability in MyGig to choose display colors, not just brightness level.
9. Hopefully AEV will finally come out with this fix, but if not, provide correction for ESP problems caused by 4" SuperLift.


Questions:
1. What happens if you remove a damaged rear (or front) driveshaft to get you off the trail and home? (QDII eqipped WK) If this causes problems, how about a drive-home mode to disable some of the electronics, with a legal disclamer acceptance though MyGig?
2. I have '08 w/ 4.7L engine. I'm still trying to read though all the manuals so if this question is answered in the manuals, sorry for bringing up here... Is there a break-in period after which I shouldn't expect more power or fuel economy gains? (I'm basing this question off reports on the JK forum that say you need to put 1000 miles on the engine before you get the full power from the engine. By the way, so far the 4.7L Gen II is wonderful)


If you remove the either driveshaft you can still drive in low range since it locks the T-case. A limp home mode for this is a good idea. We'll take a look at it.

Any engine will get better as it runs in, getting better power and effeciency as the rings, valves, and bearings settle in. The number of miles to get there varies.
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Unread 10-24-2007, 05:32 PM   #74
oH2o
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There was some talk awhile back on one of the sessions about the fact that Mopar was working on a retro kit to allow the 83.3 low bus speed MyGIG radios to work in selected 2005-2007 models. Is this project still in the works, will we see some Mopar MyGIG retro kits? You would sell a TON of them!!
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Unread 10-24-2007, 05:32 PM   #75
CDN WK
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I have a few requests for the next generation GC

1. Softer Seats with better leather (like the ZJ)
2. Spare Tire back inside (like the WJ)
3. Return the complete guage package (like previous GC's)
4. Raise the GC up 1-2"
5. Have it capable of larger tires (like previous GC's)
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