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Go Back JeepForum.com > General Jeep Forums > Jeep Engineering - Q&A > 08/29 Q/A Session - Commander

Old Man Emu WK Lift - Black Friday Special!!The Original 3/8" Ruffstuff Diff Cover!Safety Thimble Fairleads

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Unread 08-29-2007, 05:13 PM   #76
Thunderstrike
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Some parts of chassis or underneath are not rust protected. For example, knuckle or parts of drive drain/shaft are bare metal with NO type of paint to protect from rust. Can Jeep start putting rust-resistant paint or coating?

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Unread 08-29-2007, 05:13 PM   #77
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Quote:
Originally Posted by Sporer65
What was the reasoning behind using the 3.7L V6? I can sorta understand it being used in the WK, but the XK just seems too heavy for the 6 cylinder and with the same gas mileage, it just doesn't make sense to me.

Also, how different is the drag between the WK and XK? It seems like the aerodynamics would take a big hit but if you look at similar models (specifically the GM900 SUVs) they have pretty good drag characteristics.
There's a lot of reasons for offering the 3.7L - naturally CAFE is one of them, as well as offering an affordable base model.

Although I can't quote specific aerodynamic drag value differences between Grand Cherokee and Commander, the more upright windshield and greater frontal area will naturally increase wind resistance. If all cars were designed solely around aero efficiency they wouldn't be much to look at!
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Unread 08-29-2007, 05:14 PM   #78
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Quote:
Originally Posted by GenoSport
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.
Your Jeep can be retrofitted with the new ignition lock housing. Latest part number is 56010568AE.
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Unread 08-29-2007, 05:14 PM   #79
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What's the reason behind outfitting Commanders with two tone leather or cloth seats? I cringe everytime I see that Yuma leather trim.
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Unread 08-29-2007, 05:15 PM   #80
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Quote:
Originally Posted by ginald
Geeky engineering question:

I'm a stress analyst and we use a finite element program called ANSYS. It's real popular in the gas turbine business. I would LOVE to do some work on Jeeps.

What program do you guys use for your stress analysis? Any use for an ANSYS guy?
Actually for quality purposes, we use several different stress analysis programs, not any one specific. As for job opportunities go to http://www.careers.chrysler-group.com/ to access the corporate hiring site.

Thanks for the interest!
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Last edited by JeepEngineers; 08-29-2007 at 05:53 PM..
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Unread 08-29-2007, 05:15 PM   #81
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Quote:
Originally Posted by Kyle Deidrick
also related to the transfercase, are they using a slip yoke as seen on the XJ's 231/242 or have you guys switched to a doublecardon driveshaft for the rear with a fixed yoke?

-Kyle
The rear driveshaft has a single cardan joint at each end with a slip joint in the middle. So both front and rear of the transfer case have a fixed yoke.
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Unread 08-29-2007, 05:15 PM   #82
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Quote:
Originally Posted by JeepMan1975
What's the reason behind outfitting Commanders with two tone leather or cloth seats? I cringe everytime I see that Yuma leather trim.
Consumer and styling trends drive many of these decisions.
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Unread 08-29-2007, 05:16 PM   #83
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Quote:
Originally Posted by JeepEngineers
The rear driveshaft has a single cardan joint at each end with a slip joint in the middle. So both front and rear of the transfer case have a fixed yoke.
humm, so how does the single cardon joint perform when lifting the vehical? it seems to me that the vibrations would still be present.

-Kyle
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Unread 08-29-2007, 05:17 PM   #84
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why is the commander offered in 4x2? No jeep should have ever been offered in 4x2, now we the whole jeep lineup available in 4x2 and the wrangler of all cars is offered in 2 wheel drive Whats happening to Jeep?
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Unread 08-29-2007, 05:18 PM   #85
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Quote:
Originally Posted by Thunderstrike
Some parts of chassis or underneath are not rust protected. For example, knuckle or parts of drive drain/shaft are bare metal with NO type of paint to protect from rust. Can Jeep start putting rust-resistant paint or coating?

We're always looking for new ways to satisfy our customers and improve our product. Thank you for the suggestion. Keep them coming.
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Unread 08-29-2007, 05:19 PM   #86
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Quote:
Originally Posted by badfish488
why is the commander offered in 4x2? No jeep should have ever been offered in 4x2, now we the whole jeep lineup available in 4x2 and the wrangler of all cars is offered in 2 wheel drive Whats happening to Jeep?
There have been many Jeeps offered in the past with 2wd - the Jeepster is but one example. What we're all about is choice. Many consumers dont want or need 4WD and without a 2wd option, they wouldn't consider buying from us.
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Unread 08-29-2007, 05:23 PM   #87
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Quote:
Originally Posted by Kyle Deidrick
humm, so how does the single cardon joint perform when lifting the vehical? it seems to me that the vibrations would still be present.

-Kyle
Of course we don't endorse lifting a vehicle...

But, the rear driveshaft is reasonably long and we have had several modified show vehicles and have been 'wheeled all over the country without driveshaft modifications.
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Unread 08-29-2007, 05:25 PM   #88
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Quote:
Originally Posted by rob92xj
Don't you still have to initallize the trailer brake light relays with the STAR SCAN?
On a Jeep (WK/XK) equipped with factory installed trailer tow, the relays in the front control module are already initialized in the plant. When installing an aftermarket Electric Trailer brake controller, you do not need to initialize anything with a Star Scan. The electric trailer brake controller is a module in itself and sends out an electronic signal to the trailer brakes based on vehicle brake switch input.
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Unread 08-29-2007, 05:25 PM   #89
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Do all of you guys / gals drive Jeeps?
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Unread 08-29-2007, 05:26 PM   #90
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Quote:
Originally Posted by ginald
Do all of you guys / gals drive Jeeps?
Got myself a nice TJ Sahara....can't speak for the rest of us....
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