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Unread 08-29-2007, 03:47 PM   #46
Crashnburn80
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The multispeed overdrive automatic 545RFE 5spd transmission has an "alternate 2nd gear for smoother downshifting at higher speeds." So is this really a 6spd auto that selects which '2nd' gear to use based on speed/load?

Seems like an interesting approach, but why not just call it a 6spd, distribute the ratios a little more evenly and have it select 2nd or 3rd based on need (vs 2nd or alternate 2nd)?

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Unread 08-29-2007, 03:48 PM   #47
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Quote:
Originally Posted by JeepEngineers
Sorry to hear the problems with your Jeep. Unfortunately I don't have the history of your vehicle to perform a specific root cause. Some things that I can recommend off the record: There is a final drive control module software reflash that was made available to our customers a couple months ago (part number ending in AM). This reflash helps eliminate false failures. Second, check the connector going into your transfer case. Look to see if any corrosion is built up on your terminals. If so have your dealer clean it out and reseal it.
Regarding your key issue. We've recognized our customers concerns and Jeep has made a design change requiring more force to move the key to the off position. The change was implemented late 2007 model year.
Thanks for your comments. Hope this information helps.
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Thanks for the info on the 4wd.

And I think its great that you fixed the issue with the key, My only question about the key issue is can my jeep be retro fitted with this fix. As it is a saftey issue, When we drive it now we make a point not to bump the keychain at all, BTW there are only 3 keys on the key chain, so its not exssive.
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Unread 08-29-2007, 03:48 PM   #48
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besides the "comfort" factor what was (if there was a reason) for doing away with the solid front axle? Im sure some of your vehicals would have a lot more support if you brought back a solid axle at least as an option.

-Kyle
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Unread 08-29-2007, 03:50 PM   #49
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Quote:
Originally Posted by JeepEngineers
Which engine are you referring to?
oops, I didn't think that one all the way through

What kind of ignition system is in the 5.7 hemi commander?
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Unread 08-29-2007, 03:51 PM   #50
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What are you guys doing about the hemi shudder/tick?
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Unread 08-29-2007, 03:53 PM   #51
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Quote:
Originally Posted by Kyle Deidrick
besides the "comfort" factor what was (if there was a reason) for doing away with the solid front axle? Im sure some of your vehicals would have a lot more support if you brought back a solid axle at least as an option.

-Kyle
Competitive forces drive everything in this industry. In order to achieve competitive levels of ride and handling, we had to change to IFS. Unfortunately, offering both configurations would entail too many design compromises and neither setup would be as good as it could be.
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Unread 08-29-2007, 03:53 PM   #52
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Quote:
Originally Posted by creature
oops, I didn't think that one all the way through

What kind of ignition system is in the 5.7 hemi commander?
The ignition system on the 5.7L Hemi is distributorless, with a separate coil for each cylinder. (COP - Coil On Plug). The system is controlled by the NGC, powertrain control module.
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Unread 08-29-2007, 03:54 PM   #53
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Will adding a lift void the lifetime warranty?
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Unread 08-29-2007, 03:55 PM   #54
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Quote:
Originally Posted by HeavyMetal
is this 8.25 found in the commander a beefed up version of the one found in the cherokees of old? whether that be housing-wise or shaft-wise or whatever-wise

width between wheel mounting surfaces, any input in inches?
It is a similar ring and pinion size. The ring gear bolts are larger, the axle housing is stiffer, and the axle tubes are also larger. The 8.25 in the Commander is a full floating design - that means that the axle shaft does not carry the weight of the vehicle. The ELSD model has stronger side gears and differential case and has enough torque capacity to act as a locker.

I believe the wheel mounting surface is approximately 65.9".

Hope that answers it!
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Unread 08-29-2007, 03:55 PM   #55
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Have you guys thought about or been considering bringing back a solid front axle SUV? dont know if you can say that, it may be "future thinking"

-Kyle
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Unread 08-29-2007, 03:57 PM   #56
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Quote:
Originally Posted by Crookster777
What are you guys doing about the hemi shudder/tick?
Could you be more specific? The Hemi has a canted valve arrangement and these are typically noisier than inline valves due to the forces involved, you have both up and down movment and a certain degree of side loading, and the result is a certain amount of noise. Rest assured it will not result in a durability issue.
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Unread 08-29-2007, 03:58 PM   #57
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Quote:
Originally Posted by Kyle Deidrick
Have you guys thought about or been considering bringing back a solid front axle SUV? dont know if you can say that, it may be "future thinking"

-Kyle
We do offer the Wrangler and Wrangler Unlimited, don't forget.
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Unread 08-29-2007, 03:58 PM   #58
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Quote:
Originally Posted by JeepEngineers
It is a similar ring and pinion size. The ring gear bolts are larger, the axle housing is stiffer, and the axle tubes are also larger. The 8.25 in the Commander is a full floating design - that means that the axle shaft does not carry the weight of the vehicle. The ELSD model has stronger side gears and differential case and has enough torque capacity to act as a locker.

I believe the wheel mounting surface is approximately 65.9".

Hope that answers it!

Sure does, that actually sounds pretty cool. As far as spline-age in the axle shafts, 29 spliners? or different?
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Unread 08-29-2007, 03:59 PM   #59
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Quote:
Originally Posted by Oman Jeep
Another question... CAN Bus head units... does Jeep provide a way to mute them? I have a mute output from my Navigation System and my Bluetooth hands free system. I know people have difficulty in the JK Wrangler, is the Commander the same and is there a solution?

First off, I hope I understand your question correctly. If my answer sounds far off of what you're looking for, please reply back.
Jeep Grand Cherokee and Commander have used CAN bus radios since 2005 MY. The Navigation radio (REJ) is used in 2005 - 2007MY and the new My GIG Navigation radio (RER) is used in 2008 MY. Both of these radios have the ability to mute Navigation feed back. The REJ radio provides a hard key mute button that mutes both radio and navigation. The RER allows you to mute the navigation using the system setup for audible feedback.
Hope this is on target for what you're looking for.
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Unread 08-29-2007, 03:59 PM   #60
Crashnburn80
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Quote:
Originally Posted by Kyle Deidrick
Have you guys thought about or been considering bringing back a solid front axle SUV? dont know if you can say that, it may be "future thinking"

-Kyle
Like the 4 door JK.
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