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  #13  
Old 06-15-2011, 10:06 AM
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Re: Procedure when towing?

To the OP, just wondering...for your pop-up, what amount of drop do you have on your hitch? Mine has a 1" drop which causes the pop-up to be just a smidge front-high when not loaded with gear. Dealer where I bought it from thinks that's fine.
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  #14  
Old 06-15-2011, 10:41 AM
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Re: Procedure when towing?

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Originally Posted by hammer1234 View Post
In this case can't we just use the manual shift to prevent shifting into overdrive? Not as convenient but is still doable...
The biggest change on the V8 is much more than disabling OD. It actually engages an underdrive which makes gears 2 - 5 numerically higher than in normal operation. That added torque multiplier makes towing a heavy load much nicer. There were a couple times where I forgot to press the tow/haul button after refueling and immediately noticed it once it shifted into 2nd. Pressing the tow/haul button greatly improved the throttle response due to the lower gearing across the gear range.

The Merc trans on the V6 doesn't have this capability so the tow/haul button is moot.
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  #15  
Old 06-15-2011, 10:47 AM
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Re: Procedure when towing?

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Originally Posted by mjw930 View Post
The biggest change on the V8 is much more than disabling OD. It actually engages an underdrive which makes gears 2 - 5 numerically higher than in normal operation. That added torque multiplier makes towing a heavy load much nicer. There were a couple times where I forgot to press the tow/haul button after refueling and immediately noticed it once it shifted into 2nd. Pressing the tow/haul button greatly improved the throttle response due to the lower gearing across the gear range.

The Merc trans on the V6 doesn't have this capability so the tow/haul button is moot.
Thanks for the info...my question was just on the O/D button which is relevant because I only use O/D when towing on relatively level roads.
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  #16  
Old 06-15-2011, 11:07 AM
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Re: Procedure when towing?

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Originally Posted by hammer1234 View Post
Thanks for the info...my question was just on the O/D button which is relevant because I only use O/D when towing on relatively level roads.
I'm not familiar with the O/D button, don't have one on the V8.
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Old 06-15-2011, 12:02 PM
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Re: Procedure when towing?

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Originally Posted by hammer1234 View Post
To the OP, just wondering...for your pop-up, what amount of drop do you have on your hitch? Mine has a 1" drop which causes the pop-up to be just a smidge front-high when not loaded with gear. Dealer where I bought it from thinks that's fine.
I used a 2" drop. It gave the pop-up a straight line hook up. I'm not sure if that make things better or not? (new to towing)

...I have the urge to tow something now...lol.
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  #18  
Old 06-15-2011, 12:13 PM
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Re: Procedure when towing?

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Originally Posted by rein View Post
I used a 2" drop. It gave the pop-up a straight line hook up. I'm not sure if that make things better or not? (new to towing)

...I have the urge to tow something now...lol.
Straight line is best from what I've read...just wondering how straight one needs to be.

My last tow vehicle had some sag in the rear so even with a 2" rise the pop-up was front-down when loaded. Not ideal but I thought that front-down was better for reducing sway.
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Old 06-15-2011, 04:03 PM
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Re: Procedure when towing?

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Originally Posted by hammer1234 View Post
Straight line is best from what I've read...just wondering how straight one needs to be.

My last tow vehicle had some sag in the rear so even with a 2" rise the pop-up was front-down when loaded. Not ideal but I thought that front-down was better for reducing sway.
Hitch angle has pretty much no effect on trailer sway. Trailer sway is best controlled with 10% - 15% tongue weight AND the proper distance from the tongue to the axles. Since you don't have movable axles you need to make sure you load the trailer to maintain that ratio. Too heavy isn't great either, try and stay in the 10% - 15% range or around 300 - 400 lbs for a 3000 lbs trailer.

On a double axle trailer it's critical to get the trailer level. Tongue too high and you transfer more weight to the rear axle, tongue too low and you transfer weight to the front axle. Either one will cause premature bearing and tire wear on the loaded axle.

For single axle trailers it's not critical but they seem to tow better if it's closer to level (and you won't get laughed at going down the road )

The easiest way to figure out what drop you need is to level the trailer and Jeep, measure the height to the BOTTOM of the trailer tongue. Then measure the height to the TOP of the hitch receiver. Subtract the height of the receiver from the height of the trailer to get your drop or rise.

Example:

Bottom of trailer tongue = 19"
Top of hitch receiver = 22"

19" - 22" = -3" (3" drop)

Now, if you don't have rear load leveling then you may want to subtract an inch to accommodate sag.

Or read this article: http://www.etrailer.com/faq-ballmount.aspx

I use a 4" drop on this setup:

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  #20  
Old 06-15-2011, 08:49 PM
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Re: Procedure when towing?

Thanks for the info, mjw930. It's been a bit difficult to accurately measure the height of the trailer tongue in its usual parking spot so we made a guess with the help of the local camper shop. I'm thinking that we will have to swap out for a 2" drop but I'll wait and see how things look when the camper and Jeep are loaded.

Do all Jeeps with the tow package come with rear load leveling? Should I expect much sag with a loaded pop-up camper?
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  #21  
Old 06-16-2011, 10:53 AM
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Re: Procedure when towing?

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Originally Posted by hammer1234 View Post
Do all Jeeps with the tow package come with rear load leveling? Should I expect much sag with a loaded pop-up camper?
I don't even thing the factory could answer that since they seem to change the package specs without notice.

I "believe" that all V8's with the tow package and 4WD V6's with the tow package have load leveling rear suspension but the only way you can know for sure is with your window sticker or build sheet.

Take this link and substitute the VIN with yours and look for the line "Rear Load Leveling Suspension" under either the options section on the right or in the Functional/Safety features on the left.

http://www.jeep.com/hostc/getWindowS...RS6GT8BC577732
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  #22  
Old 06-16-2011, 11:24 AM
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Re: Procedure when towing?

Quote:
Originally Posted by mjw930 View Post
I don't even thing the factory could answer that since they seem to change the package specs without notice.

I "believe" that all V8's with the tow package and 4WD V6's with the tow package have load leveling rear suspension but the only way you can know for sure is with your window sticker or build sheet.

Take this link and substitute the VIN with yours and look for the line "Rear Load Leveling Suspension" under either the options section on the right or in the Functional/Safety features on the left.

http://www.jeep.com/hostc/getWindowS...RS6GT8BC577732
The link doesn't work for me for some reason but I have my window sticker and it says that it does...thanks.
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  #23  
Old 06-16-2011, 04:28 PM
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Re: Procedure when towing?

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Originally Posted by hammer1234 View Post
The link doesn't work for me for some reason but I have my window sticker and it says that it does...thanks.
Cool.

Try copy and pasting this replacing this into our browser then change the VIN to match yours. You may need to add the "www" to the front.

jeep.com/hostc/getWindowStickerPdf.do?vin=1J4RS6GT8BC577732
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