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  #13  
Old 09-26-2012, 10:01 PM
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Re: TC & Front/Rear Diff 30k Service

Quote:
Originally Posted by SvenskaJeepGuy View Post
i buy royal purple 75w140 from advance auto for $20 a qt and use their online codes to get it quite cheap.
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  #14  
Old 09-26-2012, 10:14 PM
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Re: TC & Front/Rear Diff 30k Service

It appears I have read my maintenance schedule wrong. Shall I really need to change my spark plugs if at 41K?
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  #15  
Old 09-27-2012, 12:04 PM
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Re: TC & Front/Rear Diff 30k Service

I think you should.
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  #16  
Old 09-27-2012, 12:45 PM
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Re: TC & Front/Rear Diff 30k Service

Are they platinum plugs on our Jeeps? I think after a certain year that is all they started to use. If they are this then I would think a swap would be uncessary if the vehicle is running fine. Should be able to get double out of that from what I have been told.
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  #17  
Old 09-27-2012, 02:04 PM
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Re: TC & Front/Rear Diff 30k Service

When I bought my fluids it was $92 give or take a dollar or two. That was 4 bottle of Mobil 1 differential and 1 bottle of ATF4
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  #18  
Old 09-28-2012, 12:46 AM
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The 3.7 never got long life plugs, just coppers, the 2 gen 4.7 got an extra plug per cylinder, one of which was irridum iirc, and the other copper. The 3.8l minivan/wrangler motor got long life plugs.

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  #19  
Old 09-28-2012, 06:50 AM
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Re: TC & Front/Rear Diff 30k Service

Could you tell me what plugs I would need to get? What the original ones that were put in. Is the WK picky about the brand and type?
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Old 09-28-2012, 07:16 AM
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Re: TC & Front/Rear Diff 30k Service

I assume these will work?
NGK V Power Copper/Spark Plug (6987) | 2007 Jeep Grand Cherokee 4WD 6 Cylinders K 3.7L SFI SOHC | AutoZone.com
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  #21  
Old 09-28-2012, 07:28 AM
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Champions are factory, I would stock with those... The mopar part number will be on the emissions label under the hood, I'm sure you can take that to the parts store and they can cross reference to the champion part number.

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Old 09-28-2012, 07:41 AM
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Re: TC & Front/Rear Diff 30k Service

I used the oem/mopar plugs on mine. Got them from the stealership for $30. Changed the plugs myself. Took me about 20 minutes for the whole process.
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  #23  
Old 09-28-2012, 10:00 AM
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Re: TC & Front/Rear Diff 30k Service

Thank you.

Is the WK one of those vehicles that is really finnicky and it is recommended to spend the money on the champion plugs?
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  #24  
Old 09-28-2012, 10:01 AM
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Re: TC & Front/Rear Diff 30k Service

Sorry I see your reply now. Thanks for the information.
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