Trailer wiring - Page 2 - Jeep Commander Forums: Jeep Commander Forum
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post #11 of 15 (permalink) Old 06-02-2016, 09:09 PM
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Quote:
Originally Posted by sespe commander View Post
Just for fun I punched my VIN in, and found under "Optional Equipment":

Trailer Tow Group IV
Class IV Receiver Hitch
7 and 4 Pin Wiring Harness
That's exactly what I would have expected to see listed for a Commander that had a factory towing package installed.

Thanks for clarifying.


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post #12 of 15 (permalink) Old 06-03-2016, 06:01 PM
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I believe the clutch type fan would also be an indicator of a "factory tow package."

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post #13 of 15 (permalink) Old 06-07-2016, 10:44 AM
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Quote:
Originally Posted by Kurt View Post
I believe the clutch type fan would also be an indicator of a "factory tow package."
Not necessarily. That is actually the Heavy Duty Cooling Option. Doesn't have to come with the tow package


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post #14 of 15 (permalink) Old 07-18-2017, 08:04 PM
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Quote:
Originally Posted by mangoxk View Post
Not necessarily. That is actually the Heavy Duty Cooling Option. Doesn't have to come with the tow package


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The hydraulic clutch and nylon fan is only for the 4.7 V8. The Hemi does not have need for the HD cooling.


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post #15 of 15 (permalink) Old 07-19-2017, 12:46 PM
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The Tow Package for the Commander did nothing to upgrade cooling and brakes, because the Cooling and Brakes in stock form was more than adequate for Towing.

The Tow Package included the Tow Hitch and Wiring, and some stiffer rear springs/socks (my guess, for tongue weight).

The HEMI had a "Hydraulically Driven Fan" as in a Hydraulic Motor that was powered by the Power Steering Pump to spin the fan, it was NOT a Hydraulic a.k.a. Viscous Clutch Fan. This was for all HEMI's, whether it had the tow package or not, it was because the HEMI was so crammed into the engine compartment there wasn't room for an electric driven fan. I suspect the Commander's requirement for a special hybrid Hydraulic/Power Steering fluid for the Power Steering is because of the Hydraulic driven fan for the HEMI.

I think, but not sure, some of the 4.7L V8's had an engine driven fan supplemented by an electric driven fan. That engine driven fan I "thought" had a Viscous Clutch type fan drive. Again, it had nothing to do with the Tow Package, all 4.7L's got it.

The V-6 had the room for a big electric driven fan and that is all they have, no difference regardless of tow package.

A viscous clutch fan, reduces parasitic drag on the motor by letting the fan spin slower than the engine, and they usually had a thermostatic valve in them, that if air off the radiator was getting too hot, it activate the valve and tighten up the clutch to make the fan spin faster and closer to the engine speed.

If anything, a viscous clutch would make for less cooling, not more. But, they often fitted a much larger fan than stock with a viscous clutch, the larger fan would do more cooling and the viscous clutch was there to cut down the parasitic losses so the bigger fan wouldn't be as big of a penalty.

If you see a viscous clutch fan, its just as likely that its there for better performance or efficiency, as it is there as part of a larger fan for a towing package.
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