Surprising amount of rear sag while towing camper trailer

jbzonda

Well-Known Member
First Name
Steven
Joined
Apr 29, 2020
Threads
4
Messages
49
Reaction score
76
Location
Melbourne, Australia
Vehicle(s)
2021 Wrangler Night Eagle
Hey all,

I was a little surprised at how much sag there was on the stock JLU sport suspension....
Was way within towing capabilities:

Trailer: Approx 1,110kg (2,450lb) (with all contents onboard inc full water tank, fridge, etc) with a GTM of 1,500kg (3,300lb)
Trailers tare towball download is 140kg (310lb) but not sure what it was fully loaded, though i dont expect it wouldve been over the Jeeps 250kg (550lb) capacity.

All that is well within the braked towing capacity of 2,495kg (5,500lb)

Yet, the sag seems quite excessive sag for a setup well within limits to me, but maybe im wrong? Anyone else experiencing this? Seem plenty of others on the road with different cars with similar setups dont have so much sag. Is this just a Wrangler thing with softer stock suspension?

Any comments or considerations is appreciated.

Photo 27-12-20, 6 15 14 am.jpg


Photo 31-12-20, 9 16 55 am.jpg


Photo 31-12-20, 9 14 24 am.jpg

 

Jeepster_Aus

Well-Known Member
First Name
Renier
Joined
Aug 15, 2020
Threads
1
Messages
68
Reaction score
122
Location
South Australia
Vehicle(s)
2020 JLU Rubicon
That is quite a bit of sag. Maybe it's worthwhile looking into airbags for the rear suspension.
 


OP
OP
jbzonda

jbzonda

Well-Known Member
First Name
Steven
Joined
Apr 29, 2020
Threads
4
Messages
49
Reaction score
76
Location
Melbourne, Australia
Vehicle(s)
2021 Wrangler Night Eagle
In North America it is common to use a weight distribution hitch. Do they use them in Australia?
Yep they are common in Aus, and on my list to rectify the issue, i wanted to sus out if it was a general Wrangler thing before i bought anything.
 

MaineBumpkin

Well-Known Member
First Name
Henri
Joined
Dec 30, 2020
Threads
14
Messages
289
Reaction score
447
Location
Maine
Vehicle(s)
2021 Wrangler JLU, 2021 RAM 1500
Build Thread
Link
It looks like the majority of the load is forward of the trailer wheels. Combine that with cargo in the rear of the Wrangler and you are likely over capacity. Bags will help level but a WD hitch will help distribute load to the front axle. May be a good idea to locate a local scale so you can be sure about the numbers. The one thing you can be sure of is that a bad day camping always tops a good day at work ;)
 
OP
OP
jbzonda

jbzonda

Well-Known Member
First Name
Steven
Joined
Apr 29, 2020
Threads
4
Messages
49
Reaction score
76
Location
Melbourne, Australia
Vehicle(s)
2021 Wrangler Night Eagle
It looks like the majority of the load is forward of the trailer wheels. Combine that with cargo in the rear of the Wrangler and you are likely over capacity. Bags will help level but a WD hitch will help distribute load to the front axle. May be a good idea to locate a local scale so you can be sure about the numbers. The one thing you can be sure of is that a bad day camping always tops a good day at work ;)
Yep good point; fridge, storage, gas bottle (add spare tyre and winch - it all adds up) all between the axle and hitch. Most storage in the car in front or above the rear axle. Looks like a WD hitch is the way to go.

Your damn right! haha, I setup the camper in the rain for htis trip but all part of the experience!
 
Last edited:


Steve F

Well-Known Member
First Name
Steve
Joined
Dec 8, 2020
Threads
7
Messages
238
Reaction score
423
Location
Sydney, Australia
Vehicle(s)
JLUR, JKU
Interesting to see this, I ran airbags in my JK shorty with the camper but was hoping I wouldn't need them in the JL (waiting for it to turn up), yours looks like it has a lot more weight forward than mine though. First pic was without airbags second was with, as an aside don't go weight distribution hitch, they are not suitable for offroad and the airbags are brilliant.

20171123_132329.jpg


20171229_132906.jpg
 
OP
OP
jbzonda

jbzonda

Well-Known Member
First Name
Steven
Joined
Apr 29, 2020
Threads
4
Messages
49
Reaction score
76
Location
Melbourne, Australia
Vehicle(s)
2021 Wrangler Night Eagle
Interesting to see this, I ran airbags in my JK shorty with the camper but was hoping I wouldn't need them in the JL (waiting for it to turn up), yours looks like it has a lot more weight forward than mine though. First pic was without airbags second was with, as an aside don't go weight distribution hitch, they are not suitable for offroad and the airbags are brilliant.

20171123_132329.jpg


20171229_132906.jpg
Thanks for the tip on the weight distribution hitch.

It may be one of the few drawback of the camper trialer i have - battery, kitchen, fridge, storage, gas bottle, small winch, spare tyre ALL forward of the axle, so whilst the towball weight might be will within limits, clearly not ideal.
 

sheram

Well-Known Member
First Name
Stan
Joined
May 25, 2016
Threads
2
Messages
114
Reaction score
145
Location
Athens, Ga
Vehicle(s)
2021 JLU RUBICON
Occupation
Retired
Interesting to see this, I ran airbags in my JK shorty with the camper but was hoping I wouldn't need them in the JL (waiting for it to turn up), yours looks like it has a lot more weight forward than mine though. First pic was without airbags second was with, as an aside don't go weight distribution hitch, they are not suitable for offroad and the airbags are brilliant.

20171123_132329.jpg


20171229_132906.jpg
What is your psi to level with the trailer attached? Not attached? Do you need/use them on the JL? Is the JL 2 or 4 door? I just traded my 2019 JL for a 2021 JLU. I’m towing a 2380 lb camper that I just didn’t feel comfortable towing with the 2dr. The 4 dr is a huge difference for the better. I have maybe a 1 to 1.5 inch sag (guessing) on the 4dr. With the camper attached. My OCD has caused me to order air bags for install this week. Just checking to see if I’m wasting money ?? To me both 2 and 4 door with no load look slightly higher in the front than back anyway 🤔
 

Steve F

Well-Known Member
First Name
Steve
Joined
Dec 8, 2020
Threads
7
Messages
238
Reaction score
423
Location
Sydney, Australia
Vehicle(s)
JLUR, JKU
What is your psi to level with the trailer attached? Not attached? Do you need/use them on the JL? Is the JL 2 or 4 door? I just traded my 2019 JL for a 2021 JLU. I’m towing a 2380 lb camper that I just didn’t feel comfortable towing with the 2dr. The 4 dr is a huge difference for the better. I have maybe a 1 to 1.5 inch sag (guessing) on the 4dr. With the camper attached. My OCD has caused me to order air bags for install this week. Just checking to see if I’m wasting money ?? To me both 2 and 4 door with no load look slightly higher in the front than back anyway 🤔
I went with airbags, I run 50psi with trailer and 5psi without, it is a JLUR.

Wthout airbags

20210612_101023.jpg


With airbags (and more weight, setup for a weeks camping). Best I could find, but you get the idea.

IMG_0536.jpg
 

JEEP4U

Well-Known Member
First Name
Richard
Joined
Oct 4, 2021
Threads
12
Messages
279
Reaction score
253
Location
Interstate 80 and Interstate 55___Shorewood, IL.
Vehicle(s)
2021 Jeep Wrangler JLU
Heavier rear springs needed...........check out Old Man Emu. They have springs with different rates and heights.............Very easy to R&R rear springs for towing.

 
Last edited:

Morris 4x4 Center
 
Top