Jeep Garage  - Jeep Forum banner

1 - 20 of 21 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter · #1 ·
Looking for advice setting up a WDH with my 2018 GC quadralift system. Very first travel trailer coming in a week. I have read numerous jeep forum posts but have seen different answers. From what it seems to allow WDH to relieve air bag load is to:

1) shutoff “park mode”
2) insure suspension in “normal” level
3) lock out suspension by selecting “tire change” mode
4) perform normal WDH install (measuring front & back wheel well opening height, etc)
5) once done WDH hookup, start vehicle and take out of “tire change” mode.

Thank you in advance
 

·
Registered
Joined
·
3 Posts
That’s basically what I did, never have to turn off tire jack mode though, it goes back to normal as soon as the vehicle moves
 

·
Super Moderator
Joined
·
9,694 Posts
Would you want normal or aero mode?
Normal. But Aero is only about a half inch difference and only kicks in at 65 mph. Towing anything meaningful at that kind of speed isn't the greatest idea, IMHO.
 
  • Like
Reactions: LongJohns

·
Registered
2018 Jeep Grand Cherokee High Altitude
Joined
·
214 Posts
Normal. But Aero is only about a half inch difference and only kicks in at 65 mph. Towing anything meaningful at that kind of speed isn't the greatest idea, IMHO.
Aero mode seems to kick in for me around 50mph. I don't know the exact speed, but I do know that it will drop while on a freeway that I frequent that you can't exceed the post speed due to all the stupid speed cameras. I usually set cruise at around 52 just to avoid the photos as I have had too many photos sent to me in the mail. ;) lol

But I do understand your point.
 

·
Registered
Joined
·
2,465 Posts
Aero mode seems to kick in for me around 50mph. I don't know the exact speed, but I do know that it will drop while on a freeway that I frequent that you can't exceed the post speed due to all the stupid speed cameras. I usually set cruise at around 52 just to avoid the photos as I have had too many photos sent to me in the mail. ;) lol

But I do understand your point.
Same here, my aero mode also kicks in somewhere around 50+ mph i want to say maybe around 55 mph.
Not interested in it enough to figure out the exact mph but the main highway's speed limit here is 60 mph which i seldom exceed except to pass pokey Sunday drivers. I do know It kicks in well before i hit 60 mph.

This open stretch of highway has speeders galore not to mention numerous serious accidents which is why i don't speed and stay in the right lane on this highway as the State and County police heavily patrol it most with their radar.

Now the interstate here is another thing.
75 mph speed limit with 95% of drivers doing 85+ mph including 18 wheelers. Got to keep up with the flow of traffic you know.
Radar detector and RV mirror don't fail me now! Haha
 

·
Super Moderator
Joined
·
9,694 Posts
But do you really want to tow at those high speeds, moparado? Even with traffic giving finger gestures, I'd likely stick to the right lane and do a more modest speed with a "big sail" back behind me...
 

·
Registered
Joined
·
2,465 Posts
But do you really want to tow at those high speeds, moparado? Even with traffic giving finger gestures, I'd likely stick to the right lane and do a more modest speed with a "big sail" back behind me...
Sorry Jim i don't really understand your question and reply?
Can you elaborate?
Maybe aero mode does kick in at around 65 mph when towing a heavy load?
Maybe i can learn something new regarding aero mode when towing a heavy load.

I was referring to as did LongJohns post when aero mode kicks in under normal driving conditions.
When aero mode kicks in towing a heavy load i have no clue as i've yet to tow anything with my WK2.
 

·
Super Moderator
Joined
·
9,694 Posts
I guess my point is that Aero mode wouldn't be a factor for towing unless one was traveling at the higher speeds required for it to kick in. (using Sport mode to kick it in directly, notwithstanding) Aero is sorta kinda supposta kick in at about 65 mph...that is not related to towing. It's how it works. That kind of speed with a "WK2" sized tow vehicle and a travel trailer is something I'd personally be concerned with. That said, I don't believe the half inch of lowering will be material for a WDH anyway.
 

·
Registered
Joined
·
2,465 Posts
I guess my point is that Aero mode wouldn't be a factor for towing unless one was traveling at the higher speeds required for it to kick in. (using Sport mode to kick it in directly, notwithstanding) Aero is sorta kinda supposta kick in at about 65 mph...that is not related to towing. It's how it works. That kind of speed with a "WK2" sized tow vehicle and a travel trailer is something I'd personally be concerned with. That said, I don't believe the half inch of lowering will be material for a WDH anyway.
Jim, thanks for the reply but still puzzled by your 65 mph thing and its relationship to towing.
Are you thinking that while towing things can get unstable if aero mode is enabled at that speed?
Maybe has something to do with aero mode trying to level a heavy trailer load at higher speeds?
Yeah i get hard headed every once in a while and this is one of those times. haha

Dusted off my Owner's manual (PDF file) to see what it has to say regarding aero mode.
I don't know but this explanation seems to say that aero mode is entered unconditionally based on the speed of the vehicle.
Namely somewhere between 52 mph and 56 mph for at least 20 seconds which is what i experience with my TrailHawk albeit without any kind of towing.

"Aero Mode (Lowers the vehicle approximately 0.6 inches
(15 mm))
– This position provides improved aerodynam-
ics by lowering the vehicle. The vehicle will automati-
cally enter Aero Mode when the vehicle speed remains
between 52 mph (83 km/h) and 56 mph (90 km/h) for
greater than 20 seconds or if the vehicle speed exceeds
56 mph (90 km/h). The vehicle will return to NRH from
Aero Mode if the vehicle speed remains between 20 mph
(32 km/h) and 25 mph (40 km/h) for greater than 20
seconds or if the vehicle speed falls below 20 mph
(32 km/h). The vehicle will enter Aero Mode, regardless
of vehicle speed if the vehicle is in “SPORT” mode."
 

·
Super Moderator
Joined
·
9,694 Posts
Jim, thanks for the reply but still puzzled by your 65 mph thing and its relationship to towing.
Are you thinking that while towing things can get unstable if aero mode is enabled at that speed?
No. I did not say that Aero mode would cause any issue at all. My comment was more about speed overall while towing. Let's just call it "off topic" at this point. :) I find that many folks in the US like to go a lot faster towing than I personally believe is a good idea. Pure opinion.

From your manual scrape, it appears that the speed that aero kicks in is lower now. The MY12 I had didn't hit it until north of 60 mph...about 65 in many cases.
 

·
Registered
Joined
·
2,465 Posts
No. I did not say that Aero mode would cause any issue at all. My comment was more about speed overall while towing. Let's just call it "off topic" at this point. :) I find that many folks in the US like to go a lot faster towing than I personally believe is a good idea. Pure opinion.

From your manual scrape, it appears that the speed that aero kicks in is lower now. The MY12 I had didn't hit it until north of 60 mph...about 65 in many cases.
OK Jim after that clarification now your comments make sense to me....i think its time to move on and quit beating a dead horse.
 

·
Registered
Joined
·
11 Posts
Looking for advice setting up a WDH with my 2018 GC quadralift system. Very first travel trailer coming in a week. I have read numerous jeep forum posts but have seen different answers. From what it seems to allow WDH to relieve air bag load is to:

1) shutoff “park mode”
2) insure suspension in “normal” level
3) lock out suspension by selecting “tire change” mode
4) perform normal WDH install (measuring front & back wheel well opening height, etc)
5) once done WDH hookup, start vehicle and take out of “tire change” mode.

Thank you in advance
Which engine do you have? What is the travel trailer GVWR?

I have a 2018 Trailhawk w/5.7 HEMI and tow package, and a travel trailer I'm picking up soon has a GVWR of 3,961 lb and measures 18' 6". Will be using a Curt Assure brake controller. The manual says a WDH is recommended for towing 5,000 lb. or more. I wasn't planning on using a WDH since the GC has TSC. Has anyone here towed without a one and what was your experience?
 

·
Super Moderator
Joined
·
9,694 Posts
The manual says a WDH is recommended for towing 5,000 lb. or more. I wasn't planning on using a WDH since the GC has TSC. Has anyone here towed without a one and what was your experience?
You really, really need the WDH when the tongue weight gets up in that range. The front end of your JGC will get very light without one and that's a serious safety issue...braking and steering are very much affected. I have personally experienced this and it was an "underwear changing required" event.
 

·
Registered
Joined
·
11 Posts
You really, really need the WDH when the tongue weight gets up in that range. The front end of your JGC will get very light without one and that's a serious safety issue...braking and steering are very much affected. I have personally experienced this and it was an "underwear changing required" event.
I responded to another similar thread about a Fastway e2 round bar hitch and appreciate the input.

What I'm having an issue with is that the trailer gross weight would be under 4,000 lb. I personally don't think I'd ever get close to the Jeep's maximum 720 lb. tongue weight for the fact that I'm most likely going to be struggling with maximum low cargo weight of 1,050 lb. on the Jeep. The empty Jeep is going to be about 1,300 lb. heavier than the full travel trailer.

I'm already having to limit passengers to four based on preliminary calculations, and I'm the heaviest one at 160 lbs.! I'll get final real numbers when I hit the scales.
 

·
Super Moderator
Joined
·
9,694 Posts
Unfortunately, tongue weight comes out of cargo weight, and that's not a JGC specific thing. So yea...."stuff" that can't go in the JGC has to go in the trailer and be placed for decent balance of 10-15% on the ball. For a 4K trailer you really, really do need the WDH. (and ironically, they add to the tongue weight because they typically are a bit heavy, too)
 

·
Registered
2020 Grand Cherokee Trailhawk
Joined
·
314 Posts
Aero kicks in for me at 45-50. I usually cruise at 65 and let others pass me. Had my WDH installed in normal. After I put it in Sport which lowers it to aero and measured it all again. It made no difference.
 

·
Registered
2020 Grand Cherokee Trailhawk
Joined
·
314 Posts
Which engine do you have? What is the travel trailer GVWR?

I have a 2018 Trailhawk w/5.7 HEMI and tow package, and a travel trailer I'm picking up soon has a GVWR of 3,961 lb and measures 18' 6". Will be using a Curt Assure brake controller. The manual says a WDH is recommended for towing 5,000 lb. or more. I wasn't planning on using a WDH since the GC has TSC. Has anyone here towed without a one and what was your experience?
I tow a 7000lbs travel trailer with an e2 WDH and it works well. Someone in another group upgraded to the e4 and said it was an even better improvement. I haven’t towed anything under 4000lbs with the Jeep. But I have towed a boat that weight that much with another vehicle without a WDH and it towed fine. The Jeep towing capacity is higher then my previous vehicle too. You will probably be ok. A WDH wouldn’t hurt of the right size and properly installed. You could try a test drive without it and add the WDH if you feel it’s needed.
 

·
Super Moderator
Joined
·
9,694 Posts
Many boat trailers have surge/inertial brakes (not electric brakes) and precludes using a WDH, for the most part. (Supposedly, there is one unit out there that can be compatible with surge/inertial brakes, but I forget the specifics)
 
1 - 20 of 21 Posts
Top