A Few Questions - Jeep Commander Forums: Jeep Commander Forum
Regular Service / Maintenance This section contains discussion about regular service and maintenance (upkeep) of your Jeep Commander

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post #1 of 14 (permalink) Old 01-26-2017, 12:12 PM Thread Starter
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A Few Questions

Hello all,

Just purchased my 07 4.7 4X4. Was planning on doing fluids (oil, coolant, transfer case, axles) and plugs in the next few weeks.

1.) I've seen several posts referencing using only Champion plugs - what's the benefit in going from the copper to platinum and dbl platinum?

2.) Is there a consensus as to which brand of gear oil/trans fluids are the best or should I just stick with Mopar factory stuffs?

3.) While I've got her apart and I have a chance to do some closer inspection, what are some not so common issues to really look for? I'm aware of a lot of potential problem areas, but there may be a few I overlook that are particular to this vehicle/engine setup.

Thanks in advance! I'm really enjoying perusing this forum. Lots of great info so far!

Mike
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post #2 of 14 (permalink) Old 01-26-2017, 12:55 PM
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Mike do you know what transmission you have? First is it trail rated badge on left ft fender, next does it Quadra Drive II on the back of the center console? This help folks answer your questions.
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post #3 of 14 (permalink) Old 01-26-2017, 01:30 PM Thread Starter
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Good point! I didn't even think to include that. Yes it is trail rated. It has the Quadra-Trac II system and the trans is the 545RFE.

Mike


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post #4 of 14 (permalink) Old 01-26-2017, 02:40 PM
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The only benefit to platinums is longer service life. In fact anything other than the champion coppers tend to be problematic in the hemi's
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post #5 of 14 (permalink) Old 01-26-2017, 03:22 PM Thread Starter
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Quote:
Originally Posted by luckyse7ens View Post
The only benefit to platinums is longer service life. In fact anything other than the champion coppers tend to be problematic in the hemi's
So is it just the Hemi's that have issues with different mfg's plugs?
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post #6 of 14 (permalink) Old 01-26-2017, 04:50 PM
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I ran Bosh Platinum in 4.7 with no problems. I did see you xk picture in another post and noticed the trail rating. Nice looking truck.
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post #7 of 14 (permalink) Old 01-26-2017, 07:30 PM Thread Starter
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Thank you! Good to know.


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post #8 of 14 (permalink) Old 01-26-2017, 07:55 PM
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I have platinums in my 3.7l with no issues. Got a significant mpg improvement that I attribute to super worn plugs being replaced.

The 4.7L is basically the same engine with 2 more cylinders FYI. I was heavily steered away from the platinums by quite a few forum goers, but chose to try them anyways. Just wanted you to be aware of the issues that some have with them and know that there is no performance difference despite manufacturers claims. You are likely ok running them if you prefer a longer service life.
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post #9 of 14 (permalink) Old 01-26-2017, 11:16 PM
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Quote:
Originally Posted by Mike Hobson View Post
Hello all,

Just purchased my 07 4.7 4X4. Was planning on doing fluids (oil, coolant, transfer case, axles) and plugs in the next few weeks.

1.) I've seen several posts referencing using only Champion plugs - what's the benefit in going from the copper to platinum and dbl platinum?

2.) Is there a consensus as to which brand of gear oil/trans fluids are the best or should I just stick with Mopar factory stuffs?

3.) While I've got her apart and I have a chance to do some closer inspection, what are some not so common issues to really look for? I'm aware of a lot of potential problem areas, but there may be a few I overlook that are particular to this vehicle/engine setup.

Thanks in advance! I'm really enjoying perusing this forum. Lots of great info so far!

Mike
Mike,

I'd suggest following the factory recommendations on all of the above and stick with CHRYSLER/MOPAR for a variety of reasons.

My main reasons being, I take my XK to Jeep for anything I can't do myself - and I will not give them the ready-made excuse of "You should have followed the manufacturer's recommendations in your owner's/service manual" if something mechanical were to ever breakdown or fail.


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post #10 of 14 (permalink) Old 01-27-2017, 08:01 PM
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I run Denso Iridiums in my 5.7 Hemi Commander and have been for several years in a couple of different Jeeps and Dodge trucks.. The spark plug problem is with some aftermarket Champion plugs that have too much resistance and cause ignition problems. These plugs are sold as the OEM replacements and have the correct part number but do not work n the Chrysler engines because of different electrical resistance than they are supposed to have. Many platinum and iridium plugs are lower resistance than the OEM plugs so they will work fine. It was a very strange issue with these aftermarket copper Champion plugs sold through aftermarket parts stores. The dealer should only be stocking OEM Champion plugs that should work fine as long as they came from Chrysler.
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