Thread Tools Search this Thread Display Modes
Old 10-17-2007, 02:15 PM   #57
uwe's Avatar
1963 26' Overlander
1958 22' Flying Cloud
1963 19' Globetrotter
Portola Hills , California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,764
Images: 41
Send a message via Skype™ to uwe
Originally Posted by ROBERT CROSS
GREAT!! ......I hope all GM users on the Forum will inspect their

reciever and replace the OEM unit.........SAFE STREAM'N

Do you know if this also applies to receivers on 07 and later Suburbans? The square receiver is welded directly to the rearmost frame crossmember. Pretty high up, too.

uwe is offline   Reply With Quote
Old 10-17-2007, 02:25 PM   #58

2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 10,802
Images: 1
07 Burb Hitch

Originally Posted by uwe
Do you know if this also applies to receivers on 07 and later Suburbans? The square receiver is welded directly to the rearmost frame crossmember. Pretty high up, too.
We have an 07 in the store for a trlr wiring concern right now.

I'll check it out tomorrow and post an up-date..........Bob

AF #1

"Sticks & stones can break your bones...and hail will dent your Airstream"

So when is this..."old enough to know better" supposed to kick in?
ROBERT CROSS is offline   Reply With Quote
Old 10-17-2007, 03:04 PM   #59
. , .
Join Date: Dec 2004
Posts: 8,812
Originally Posted by uwe
Well....ah.....not quite. Adding the two numbers unfortunately does not give you the GCWR....
bingo uwe!

every bit of payload & options beyond a driver and a bit of fuel...

reduces towing capacity as well...

unfortunately even the DRIVER counts against payload on this model..

gcwr figures should be EASY to find; when they aren't i get worried.

the ohfive threefourths subs gcwr is approx 19000lbs...

with all the towing upgrades.

all of the true things that i am about to tell you are shameless lies. l.b.j.

we are here on earth to fart around. don't let anybody tell you any different. k.v.
2airishuman is offline   Reply With Quote
Old 10-17-2007, 04:38 PM   #60
Rivet Master
boondockdad's Avatar
2008 30' Classic S/O
Dearborn , Michigan
Join Date: Aug 2006
Posts: 1,278
Images: 21
so.... max tow rating number is 12000# only with a completely empty (no gas, pass, driver, cargo) truck?
boondockdad is offline   Reply With Quote
Old 10-17-2007, 04:47 PM   #61
Rivet Master
boondockdad's Avatar
2008 30' Classic S/O
Dearborn , Michigan
Join Date: Aug 2006
Posts: 1,278
Images: 21
my bad
found it
its not in the owners manual
GCWR is listed in the 2005 GM Trailering and Towing Guide
boondockdad is offline   Reply With Quote
Old 10-23-2007, 05:17 PM   #62
Rivet Master
boondockdad's Avatar
2008 30' Classic S/O
Dearborn , Michigan
Join Date: Aug 2006
Posts: 1,278
Images: 21
OK. Here's where I'm at.
Got the sherline today.
Took it to the scales again yesterday.
Truck: full tank gas, no driver, no pass, no cargo.
Trailer: full fresh water, full LP, no cargo.

Tongue weight: 1200# on the nose.

Lowered ball to 19" (from equalizer recommended 21.75")
Maxed out washers with 7 (up from 5)
Max setting on 'L' brackets (think 7? second from lowest hole)

Steer: 3300#
Drive: 4580#
Trailer: 7820#
Gross: 15700#

8% difference between steer and drive for GCW
16% difference between steer and drive on just truck

according to my last loaded for travel weigh... i'm gonna add about 900lbs total- although it will probably improve balance, it will push me over my hitch rating.

I'm not sure if i should upgrade to the 1400# rated equalizer, or pitch it and dump another $3500 on an arrow...

btw- dropping the ball increased the spring bar leverage (i.e. weight transfer to steer axle) quite a bit... wondering if i should drop it another notch...
boondockdad is offline   Reply With Quote
Old 10-24-2007, 10:47 AM   #63
Rivet Master
JimGolden's Avatar
Vintage Kin Owner
1977 31' Excella 500
Berkeley Springs , West Virginia
Join Date: Sep 2005
Posts: 1,600
Images: 7
I bought the 1400lb Equal-I-Zer because my tongue weight might conceivably creep over 1200 lbs AND the 1200lb hitch and 1400lb hitch use the same WD bars. The difference is in the hitch head itself.

You set the ball height based upon what the final ride height of the truck will be. It'd kind of a guess, but the directions say to basically find the static height of the trailer (just say 20" for example) and you set the hitch at 20" on the truck. Now add I believe 1/8" per 100lbs of tongue weight. So if you've got 1200lbs of tongue weight, you'd add 12/8 or 1.5" to the height of the ball. So you set the ball at 21.5". Pick the closest setting to that. Lower would be better.

You then adjust the cant of the ball with the washers AND the L-bracket height to get the amount of preload correct. Each one is a separate variable unto itself. One washer of cant just about equals one hole location on the L-brackets. You might also flip the links over that the L-brackets attach to if that will give you more adjustment. My trailer has an inverted tongue and I had to do that. Before I did, I was running out of adjustment. I flipped the links and I'm right back in the middle.

So you set the ball height to your best guess, start with five or six washers and set the L-brackets at the 5th hole and see what happens. Then just start playing with it. You do want the WD bars to be parallel to the ground, or as close to it as you can. So you basically get it that way with the L-brackets and then change the washers.

There are like 16 different settings you can get with this. But the idea is to make the front squat nearly equally to the rear. They recommend 1" of difference is OK, but you can get closer. I believe I have mine set up to drop the rear of the truck 1.5" and the front drops 0.75".

I'm pulling a 34' triple axle Avion with my Eq. Avion recommends you have the front of the trailer about 1/2" low anyway, and I'm just about exactly there. It's almost imperceptable. But it works. I pulled it 250 miles last weekend at speeds up to 80mph and she was steady as the rock of Gibraltar.

The Eq is a good rig if you get it set up right.

I wouldn't worry so much about the axle weight differentials. These don't sound too bad. You're not going to load the front axle as much as the rear, for a given equal amount of squat on both ends. Do your moment arm calculations and you'll see that your ratio probably isn't too far off.

Personally, I feel the Hensley is a sweet rig. But the Eq is great too. You just have to dial it in. If you're right at 1200lbs, I'd probably hang tight with what you've got. I'd bet good money that they have a generous safety factor built in.

But if you're really worried about it, what you really want is to have the CG of the trailer about 13% in front of the center point of your axles. So measure from the ball back to the midpoint between the two axles. Now come forward 13% and that's where you want the whole thing to balance. Now do the math based off your axle weights and jack weight. That will tell you where the CG really is. It may be that you're artificially nose heavy. If so, play around with the stuff you carry to shift the CG back enough to get it where it should be.

Excessively forward CG won't totally kill the handling, but it will really push up your tongue weight. Excessively aft CG WILL kill the handling, so be careful. But if you do it right, you might take a couple hundred pounds off the tongue weight and have your CG nailed right where it should be. I'd try that before dropping the $3000.

Oh, one last point. Be careful not to bend your A-frame by cranking in too much preload.

Best of luck,
- Jim
JimGolden is offline   Reply With Quote
Old 10-24-2007, 10:53 AM   #64
Rivet Master
boondockdad's Avatar
2008 30' Classic S/O
Dearborn , Michigan
Join Date: Aug 2006
Posts: 1,278
Images: 21
Thanks Jim
I've not looked at the CG, yet... I'll be sure to

I don't know if it was because of the high winds from a couple of days ago- but my last setup (16% weight diff between axles) somehow 'felt' better towing than my current (8% weight diff) setup

dunno... numbers look good, seat of pants didn't

boondockdad is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Interesting rig bake315 Off Topic Forum 4 06-26-2007 08:54 AM
If you've weighed your TV and trailer... ljmiii Towing, Tow Vehicles & Hitches 15 12-09-2006 04:59 PM
New Rig Craftsman On The Road... 1 08-15-2004 03:04 PM
Getting Weighed cosmotini Our Community 2 03-22-2004 09:41 PM
your tow rig john hd Off Topic Forum 25 01-14-2003 09:49 PM

Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:50 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.