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  #25  
Old 05-14-2012, 08:44 AM
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Re: JEEP Engineers suck!

Whatever you do must make sure the spare is securely attached to your ride. Just flipping it over and not securing it would be pretty dumb.
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  #26  
Old 05-14-2012, 08:57 AM
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Re: JEEP Engineers suck!

As a design engineer myself I am greatly amused when someone modifies a product without proper planning then blames the designer for it not working.

Every vehicle that I have owned since the 80's has had a spare wheel/tire assembly that was different than the four bolted onto the axles. It has been at least 30 years since tire rotation recommendations from major tire manufacturers include the spare. With the addition of TPM systems, now a federal requirement, including the spare tire in rotation is ancient history.

Design is an exercise in trade-offs; you maximize something at the expense of another, or you make a judgement or choice and balance two objectives to achieve an acceptable result.

In the case of the GC spare tire, I agree with the designer's choices:
  • The spare is made narrower and placed inside the vehicle instead of mounted underneath. This increases the exit angle of the vehicle rear, and gives better access to the spare in the event of a tire failure on soft surfaces.
  • Mounted inside, the tire/ wheel assembly is kept clean. Also better access to the valve stem to check pressure and add air as needed.
  • The diameter of the spare is the same as the drive wheels, so the 4WD functions when using it are preserved.
  • Technically it is a full sized spare, so the vehicle won't be restricted form 4WD areas where that issue is regulated.
  • Being a different tire size, the possibility of using it in a rotation is eliminated (bad), but since it is a temporary tire, a lower quality tire can be used, saving first purchase costs (good).
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  #27  
Old 05-14-2012, 09:48 AM
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Re: JEEP Engineers suck!

Quote:
Originally Posted by IRISH View Post
I get a kick out of all the responses from my guess "new Jeep owners" this is my 6th Grand Cherokee and the only one that a full size spare never was offered, or fit. I knew when they built this one it would appeal to women more than previous generations and it is obvious here.
This is also the first Grand Cherokee you've ever owned when 20" wheels were an option. As others have said...the 18s fit. And a full size spare is ABSOLUTELY offered...just only with the 18s.

If you used your GC for something other than showing off, as you seem to think the "women" here do...you wouldn't have gotten the off-road useless, no benefit but show 20" wheels.

With wheel diameters increasing, you are seeing fewer and fewer full sized spares from all manufacturers, its just a function of space.

As for the WK2 vs older Jeeps. Maybe they have a full size spare (and seeing that I've maybe had 1 flat over the last 10 years, and drove on the spare for all of 3 miles, who cares?), but they were such utter cheap plastic, poor ergonomics, unreliable typical Chrysler dross I would never, ever have considered purchasing one. The WK2 is an INCREDIBLE improvement over any other "Grand Cherokee" in every conceivable way.

Move along.
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  #28  
Old 05-14-2012, 12:58 PM
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Re: JEEP Engineers suck!

Another option is a swing-away tire carrier mounted on the receiver, size does not matter then.
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  #29  
Old 05-14-2012, 09:22 PM
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Re: JEEP Engineers suck!

Quote:
Originally Posted by Yadkin View Post
very vehicle that I have owned since the 80's has had a spare wheel/tire assembly that was different than the four bolted onto the axles. It has been at least 30 years since tire rotation recommendations from major tire manufacturers include the spare.
Our former 1994 GC Limited had the same spare tire/wheel as the four others, so five-tire rotation was not only possible but recommended. Chewed up a hell of a lot of space in the back, tho.
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  #30  
Old 05-14-2012, 11:19 PM
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Re: JEEP Engineers suck!

You are the same guy that called me a troll years ago on JU because I posted about replacing my POS 06 Hemi Ltd with an 08 4Runner. This WK is my 7th Grand Cherokee. Ive owned ozens of Jeeps and the 06 WK was the reason for me bailing to go to Toyota. The WK2 is what brought me back. I can remember pointing out my frustrations about my 06 WK and you were obsessed with calling me a troll. Tollololol
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  #31  
Old 05-15-2012, 08:34 AM
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Re: JEEP Engineers suck!

irish you should OCCUPY JEEP!!!
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  #32  
Old 05-15-2012, 11:10 AM
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Re: JEEP Engineers suck!

I can agree with the title is we are referring to transmission and engine programming.

Don't care about the spare too much, I usually take it out and keep my kids toys in there. I only put it in for long trips or when I am going off-road.
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  #33  
Old 05-15-2012, 11:16 AM
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Re: JEEP Engineers suck!

if the spare is so important to you then why didnt you check it prior to purchase?? i have a full size under mine but i could care less.
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  #34  
Old 05-15-2012, 01:12 PM
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Re: JEEP Engineers suck!

Im not particulary impressed with the overall quality of my 47000 dollar vehicle,,

However Im thinking that seeing this thread title in forums is getting annoying,,,

I make a motion that it be changed to " In My Opinion Jeep Engineers Suck!" or removed totally...
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  #35  
Old 05-15-2012, 03:50 PM
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Re: JEEP Engineers suck!

Its all about your expectations. The Jeep is not a luxury car, yours might be $47,000...but its essentially the same basic vehicle as a $27,000 Laredo E. Its not a Mercedes. I think the Jeep is very high quality when compared to its competition...
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  #36  
Old 05-15-2012, 03:59 PM
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Re: JEEP Engineers suck!

Quote:
Originally Posted by SW03ES View Post
Its all about your expectations. The Jeep is not a luxury car, yours might be $47,000...but its essentially the same basic vehicle as a $27,000 Laredo E. Its not a Mercedes. I think the Jeep is very high quality when compared to its competition...
Respectfully disagreee with your point in its entirety.

Expectations or not I expected more quality from the vehicle than I am encountering. I mention nothing of luxury.

Funny how it is the same base vehicle but for 20,000 more stuff its not working as designed,, again quality not luxury.

And how sad is it that society today is reduced to comparing items to similiar items that suck more.

The "if you think Jeep sucks then try a Mercedes because they suck more" defense does not ring home on this issue to me.

That being said I dont think it is the design engineers faults and they probably did an amazing job given the parameters they where forced to work in. ( budget, materials etc )
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