Need more towing power for 4.7L - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 33 (permalink) Old 10-14-2010, 04:38 PM Thread Starter
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Need more towing power for 4.7L

Love my Commander, but I want to add a toyhauler or a box trailer with basic camping gear to my toy box. Currently I have a 16 foot tantem axle utility trailer . Not sure how much it weighs other than the data plate says it's rated to haul 7,000 pounds. On the way to the local trails I pull some steep hills. When I put 3 4x4 atv's and a couple dirt bikes I'm close to the red line a lot, get around 9.5 mpg instead of my normal 14 mpg. I want a box trailer so I can stay overnight and have it all ready to roll when I got off work on my Friday, just hook up and roll out.
Guess I'm looking for torque over horse power. No upgrades other than a K&N drop in, and just changed the plugs to champion double platinum's.
Also would like a small lift to compliments the 255 tires I have, and it PISSES me off that hummers sit higher then me.
Sorry to wright a book, just trying to paint y'all a picture.
Thank you for your time.
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post #2 of 33 (permalink) Old 10-14-2010, 05:51 PM
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I'd start out by buying the Superchips Flashpaq and setting it to the tow setting. Gears are a big thing when it comes to towing but unfortunately no one makes gears lower then the 3.73's you already have.




2007 4.7 Liter XK | Front OME MD Springs w/Superlift Preload Spacer | Rear 4" Superlift Springs | Bilstein 5125 Rear Shocks | JBA UCA's | Rusty's Rear Adjustable Track Bar | Black Rock 997 Wheels | Fred Goeske 1/4 Inch Wheel Spacers | 305/70R17 Goodyear Wrangler MT/R w/Kevlar | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front E-Locker | Rear Heat/AC Delete

Last edited by 07JeepXK; 10-14-2010 at 06:12 PM.
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post #3 of 33 (permalink) Old 10-14-2010, 05:57 PM
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Well, if you just need something to get you over the steep hills you could try this. You might want to put something in front of your trailer to keep it from burning up.


2007 Jeep Green Limited 4.7 Flex Fuel, RR 2.5" 4 inch Superlift coils on rear, 1.5" Spacers, Bridgestone 265/70/17, K&N CAI, Flowmaster, Diamond Plate Locking Trunk, Blue Ox Baseplate w/D-rings, "Get Lost 4X4" Front Bumper, T-Max 9000 winch, "Get Lost rear tire carrier, 30 gal second gas tank.
Second 2007 Jeep Green Limited Leather HEMI QDII VES Uconnect Flowmaster OEM Skids Tow Package

Maybe the two will meet up soon edit: they did , I now have 2,now gave 1 away...and got it back again.
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post #4 of 33 (permalink) Old 10-14-2010, 06:41 PM
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So what you're saying is that your current setup already red lines your Jeep, but you want to add a heavier trailer AND bigger tires to this setup?
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post #5 of 33 (permalink) Old 10-14-2010, 06:52 PM
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Quote:
Originally Posted by 07JeepXK View Post
I'd start out by buying the Superchips Flashpaq and setting it to the tow setting. Gears are a big thing when it comes to towing but unfortunately no one makes gears lower then the 3.73's you already have.
This was the first thing I thought of while reading the thread. 7000lbs will but a strain on most vehicles in that situation the only way to easily pull that would be in a 1/2 ton maybe.


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post #6 of 33 (permalink) Old 10-14-2010, 07:01 PM
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I disagree, Should have got a HEMI. They are rated for 7200 lbs.
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post #7 of 33 (permalink) Old 10-14-2010, 08:02 PM
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A HEMI really wouldnt have made that much of a difference with that heavy of a trailer. He needs lower gears.




2007 4.7 Liter XK | Front OME MD Springs w/Superlift Preload Spacer | Rear 4" Superlift Springs | Bilstein 5125 Rear Shocks | JBA UCA's | Rusty's Rear Adjustable Track Bar | Black Rock 997 Wheels | Fred Goeske 1/4 Inch Wheel Spacers | 305/70R17 Goodyear Wrangler MT/R w/Kevlar | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front E-Locker | Rear Heat/AC Delete
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post #8 of 33 (permalink) Old 10-14-2010, 08:42 PM
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Quote:
Originally Posted by 07JeepXK View Post
A HEMI really wouldnt have made that much of a difference with that heavy of a trailer. He needs lower gears.
Are you speaking from experience about the Commander with a HEMI with 3.73 ration?
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post #9 of 33 (permalink) Old 10-14-2010, 08:57 PM
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A 5.7l HEMI with the same 5 speed automatic 545rfe with a 3.73 ratio in a 07 2500 Ram quad cab can tow 9250lbs.

So yes the HEMI commander could do what you want and more.

Last edited by 06h; 10-14-2010 at 09:01 PM.
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post #10 of 33 (permalink) Old 10-14-2010, 09:57 PM
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Quote:
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A 5.7l HEMI with the same 5 speed automatic 545rfe with a 3.73 ratio in a 07 2500 Ram quad cab can tow 9250lbs.

So yes the HEMI commander could do what you want and more.
You can put what ever name you want on an engine but its the numbers the engine puts out that matters. First it's not an actual HEMI anyway it just has the name. Even though it does put out slightly more HP/torque it's nothing the 4.7L can't beat with some mods. Trying to pull 7000lbs up hill with either engine with the factory tow package installed giving them both the 3:73 gear will put a hurt on either engine. Installing some mods will help slightly with gaining more HP the programmer will help some more switching to the tow mode but that weight on the XK going up hill will make it struggle know matter what.


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