Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-15-2009, 09:56 PM   #1
gordonpoole
Junior Member
 
Join Date: Sep 2009
Location: Hope, BC
Posts: 4
hitch placement

I have a Chev short box and have the hitch centered over my back axle. This doesn't give me a sharp enough turning radius without the trailer hitting my back window. Is there a problem moving the hitch back 4"?
__________________

gordonpoole is offline   Reply With Quote
Old 09-16-2009, 08:21 PM   #2
billr
Senior Member
 
Join Date: Jan 2006
Location: Ontario Canada
Posts: 857
The hitch has to be centered on the axle CL. Actually it should be 1" fwd of the Axle CL. No way should you move it back on a Pickup. It will pull wt off your front axle and cause some very bad handling.

You will have to keep a close eye on your turns and when backing.

We towed with a SB Chevy for 4 yrs with no slider and no issues. Have to watch it though.

Another option is a sliding hitch. There are manual types you have to stop and get out and pull a lever to slide them back and same to reset fwd for driving. These are only for parking etc, no driving. Problem with these is you HAVE to use it, if you forget, wham! Lots of mashed up truck windows on trucks with sliders and forgot to pull them.

There is also a hitch that is automatic. Is a bit higher cost. It always moves back when a tight turn is started and returns to normal when straight.

Bill
__________________

__________________
Bill and Joan
4 Collie pups
05 M/S 38RL3 #2046
01 Volvo VNL770
05 Smart Passion Loaded piggyback
https://picasaweb.google.com/billandjoan
Weigh-It Portable RV Scales
https://www.weighitrv.com
billr is offline   Reply With Quote
Old 09-17-2009, 10:18 AM   #3
wingnut60
Site Team
 
Join Date: Sep 2005
Location: Where we park it
Posts: 2,838
hitch location

As billr says--don't move the hitch rearward, it will leverage weight OFF the front axle and result in squirrely handling. PullRite Superglide is usually the answer; Reese has a manual slider, several others also.
If you go manual, you HAVE to remember to release the slider before turning.
Joe
__________________
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired
wingnut60 is offline   Reply With Quote
Old 09-18-2009, 05:03 PM   #4
gordonpoole
Junior Member
 
Join Date: Sep 2009
Location: Hope, BC
Posts: 4
Thanks for the replies from both Bill and Joe. I ran my problem by two engineers and they calculated that I lost 18lbs off my front end for every inch I moved the hitch back from centre (not compounded). I'm not sure how much of a problem that would cause, but I'm looking into a automatic slider.
Gord
gordonpoole is offline   Reply With Quote
Old 09-19-2009, 09:43 AM   #5
Motor31
Senior Member
 
Join Date: May 2005
Posts: 2,130
The hitch manufacturer has already done most of the calculations for you. The mounting instructions should show where the hitch is to be mounted.

It's not likely you will get a fixed amount of weight transfer per inch as you have to figure the pin weight of the trailer into the calculations. Heavier trailers add more weight and if you move it back you'll be in the same position as a bumper pull that is too heavy for the truck. The 5th wheel trailer will put between 10% to 20% of it's weight on the tow vehicle.
__________________
Mike Nancy and the fuzzies
Fulltiming since June 2004
Volvo 660 MH tow vehicle
2005 MS 38RL
2007 Saturn Ion "toad"
2010 Gold Wing "piggyback"
Motor31 is offline   Reply With Quote
Old 09-19-2009, 10:39 AM   #6
Stripit
Senior Member
 
Join Date: May 2005
Location: Home Prescott, Az
Posts: 1,019
Send a message via AIM to Stripit Send a message via MSN to Stripit Send a message via Yahoo to Stripit
Quote:
Originally Posted by gordonpoole
Thanks for the replies from both Bill and Joe. I ran my problem by two engineers and they calculated that I lost 18lbs off my front end for every inch I moved the hitch back from centre (not compounded). I'm not sure how much of a problem that would cause, but I'm looking into a automatic slider.
Gord
We have seen hitches mounted slightly rearward of the axle in a few trucks and the weights pulled off the front axle was significant, like hundreds of pounds. I explained to them the reason for where the hitch should be and why. Lifting 3 or 4 hundred pounds off that steering axle caused all kinds of issues. Even having it where it belongs could add hundreds of pounds to the front axle if the pin weights were high.
__________________
2013 Tiffin Allegro 34 QFA
2015 Cadillac SRX (towed)
2019 Tesla Model X
1991 Avanti Conv
Stripit is offline   Reply With Quote
Old 09-19-2009, 05:13 PM   #7
wingnut60
Site Team
 
Join Date: Sep 2005
Location: Where we park it
Posts: 2,838
hitch placement

gordonpoole,
Something is wrong with the eng calcs, or they don't have enough info to run the calcs. Assume you move the hitch 10" rearward (180lbs by the eng calculations)--I believe you will find that a 10" movement would be WAY more than 180 lbs off the front. Leverage of the pin weight is probably what the engs don't have to work with.
Joe
__________________
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired
wingnut60 is offline   Reply With Quote
Old 10-01-2009, 10:47 PM   #8
gordonpoole
Junior Member
 
Join Date: Sep 2009
Location: Hope, BC
Posts: 4
Hi all,
I ran my truck and trailer over the government scales with the hitch centered over my axle and then again with it moved back one notch(4"). The front axle weight difference was 69lb. My trailer weight is aprox. 12000lb and my hitch weight is 2100lb. I then drove aprox 200 miles over a fairly windy and rough road with the hitch back 4" and never noticed any difference in handling.
Gord
gordonpoole is offline   Reply With Quote
Old 10-02-2009, 10:21 AM   #9
BillA
Member
 
Join Date: Aug 2009
Location: Houston, Tx
Posts: 47
FWIW. Weight on the front axel in a static condition is one point of information. Weight in a dynamic condition is another. You may want to consider that the force on your fifth wheel hitch exerted by your trailer is dynamic (Force = Mass X Acceleration) as the truck/trailer combination moves up and down on their respective suspensions. What this translates to is 2100# pin weight in a static condition will become greater than 2100# in dynamic condition due to acceleration of the trailer in a downward direction and less than 2100# as the truck/trailer accelerates in an upward direction. This in turn will remove more than 69 pounds from the front axle at times and less than 69 pounds at other times. Can't say whether that is an unsafe condition but a margin of steering and braking control is being sacrificed. Also wonder if you may have front tire wear issues down the road.
__________________
Bill & Ann Anderson
2010 Elite 38RS4 (On order)
2007 Freightliner M2-106 Chariot Conversion
BillA is offline   Reply With Quote
Old 10-03-2009, 12:20 AM   #10
wingnut60
Site Team
 
Join Date: Sep 2005
Location: Where we park it
Posts: 2,838
hitch movement

gordonpoole--
Your weights seem to bear out the engineers calculations--it is surprising to me that there is no more difference than you state, but I should have known better than to argue with engineers.
Change the hitch placement and tow it more to see how it works--no handling problems, then no problem. Go for it.
Joe
__________________
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired
wingnut60 is offline   Reply With Quote
Old 10-08-2009, 10:43 PM   #11
kennethwooster
Junior Member
 
Join Date: Jan 2006
Location: Texas
Posts: 13
I had the same problems with the F350. After being very careful, a guy that worked for me was moving the rig and took out the back window. I wouldn't worry with trying to place the hitch different. I went with the Super Glide and now I never have to look back. Very smooth hitch.
__________________

kennethwooster is offline   Reply With Quote
Reply

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

Forum Jump

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 06:46 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
×