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  #37  
Old 08-10-2015, 11:34 AM
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Re: First Tow with Diesel

We drove from Moab to Zion national national parks via I70 and I15. We encountered a lot of 6% uphill grades. Average oil temp was 235 and the coolant niddle was most of the time on last line of the second quarter. The trans temp was between 195-201. Sometimes the coolant gauge was going up to the middle of the third quarter and the oil temp was up to 245, even if we were driving 30 mph. We weighted the RV trailer and the GC together. Both combined weighted 10800 lbs. Our GC is 5300 lbs, so the additional load including us was 5200. The average speed was 40 MPH for whole trip between Moab and Zion national national park. The outside temperature was changing rapidly from 93 F to 59 F due to elevation changes. We noticed that cooler outside temp helped reducing the heat but not much since the elevation was high which a factor for overheating. The RV trailer's frontal is 45 square feet. The TW is 750.
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  #38  
Old 08-10-2015, 02:41 PM
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Re: First Tow with Diesel

Quote:
Originally Posted by Olivia_2015 View Post
We drove from Moab to Zion national national parks via I70 and I15. We encountered a lot of 6% uphill grades. Average oil temp was 235 and the coolant niddle was most of the time on last line of the second quarter. The trans temp was between 195-201. Sometimes the coolant gauge was going up to the middle of the third quarter and the oil temp was up to 245, even if we were driving 30 mph. We weighted the RV trailer and the GC together. Both combined weighted 10800 lbs. Our GC is 5300 lbs, so the additional load including us was 5200. The average speed was 40 MPH for whole trip between Moab and Zion national national park. The outside temperature was changing rapidly from 93 F to 59 F due to elevation changes. We noticed that cooler outside temp helped reducing the heat but not much since the elevation was high which a factor for overheating. The RV trailer's frontal is 45 square feet. The TW is 750.

I am considering renting a camper trailer like yours for a future vacation. How did your rig handle?

I have towed a 2200-lb U-Haul auto transport with cars that weighed 2100-lbs and 3200-lbs, and my JGC wasn't breathing hard. I could barely tell there was much of a load back there. I towed the 2100-lb car over Hwy 17 over the Santa Cruz mountains (Patchen Pass, 1,800' elevation) and in the twisty roads in the mountains, and the JGC handled very well. This was without auxiliary brakes other than the hydraulic surge brakes the U-Haul came with.
(Trailer specs: U-Haul: Auto Transport Rental)
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  #39  
Old 08-12-2015, 01:12 PM
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Re: First Tow with Diesel

Quote:
Originally Posted by echo7tango View Post
I am considering renting a camper trailer like yours for a future vacation. How did your rig handle?

I have towed a 2200-lb U-Haul auto transport with cars that weighed 2100-lbs and 3200-lbs, and my JGC wasn't breathing hard. I could barely tell there was much of a load back there. I towed the 2100-lb car over Hwy 17 over the Santa Cruz mountains (Patchen Pass, 1,800' elevation) and in the twisty roads in the mountains, and the JGC handled very well. This was without auxiliary brakes other than the hydraulic surge brakes the U-Haul came with.
(Trailer specs: U-Haul: Auto Transport Rental)
I don't want to hijack this thread, but I just recently posted a detailed description of how our '15 GC ED handles while towing a 22' trailer here in the NW in another thread that might be helpful to you:

Can I safely tow a longer trailer?

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  #40  
Old 08-12-2015, 02:53 PM
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Re: First Tow with Diesel

Hot rod shops have products like Water Wetter and what not. My understanding is that they are just non-foaming soap and they make water have less cohesion and adhesion, where it sticks to itself. It removes that quality. The effect of this is that the water is actually, at a microscopic level, closer to the metal it is trying to transfer heat from/ to. And so the coolant becomes notably more effective at transferring heat.

I was doing car track days about 3 years ago and my car was getting quite hot and the local shop recommended this stuff. They actually recommended a brand besides Water Wetter but it was the same idea, but I don't recall the brand.

Anyways, at the next track day the engine ran notably cooler. It wasn't a very subtle difference. It made a BIG reduction in engine temps and especially cool down times.

Now obviously the GC thermostat opens up at a very high temp, and if the coolant isn't flowing, a WW type coolant additive isn't going to help. But once that coolant is flowing it should notably improve heat transfer out of the engine and across the radiator.

I don't tow with my GC but I think it would be wise for one of the regular towers to experiment with a product like this.
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  #41  
Old 08-16-2015, 12:41 AM
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Re: First Tow with Diesel

Quote:
Originally Posted by echo7tango View Post
I am considering renting a camper trailer like yours for a future vacation. How did your rig handle?

I have towed a 2200-lb U-Haul auto transport with cars that weighed 2100-lbs and 3200-lbs, and my JGC wasn't breathing hard. I could barely tell there was much of a load back there. I towed the 2100-lb car over Hwy 17 over the Santa Cruz mountains (Patchen Pass, 1,800' elevation) and in the twisty roads in the mountains, and the JGC handled very well. This was without auxiliary brakes other than the hydraulic surge brakes the U-Haul came with.
(Trailer specs: U-Haul: Auto Transport Rental)
For the short distances 100-200 miles towing of a trailer up to 6000 lbs, I think it makes sense to use your GC diesel, however for the long distances it is pretty scary to tow a 5000-6000 lbs trailer, because you have to drive slowly. Even if you drove slowly, the gauge niddle and oil temp raise and you don't know what kind of damage you are inflicting to your car. For our next RV vacation, we are planning to camp around the area that we are renting the RV trailer from.
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  #42  
Old 08-17-2015, 08:58 PM
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First Tow with Diesel

Olivia I don't agree with your statement at all. I have towed my 25' 6600 lb Airstream all over. Western mountains, Eastern mountains, and flat lands. I did see the coolant temp climb, as others have, but have never over heated. I tow at the speed limits and sometimes faster. (65-80). I do turn the Eco and park sence off. I did use the paddles on the descents, to engine brake.

Proper hitch set up is very important. A trip the the CAT scales will tell you a lot about the weight distrabution.

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  #43  
Old 08-17-2015, 09:13 PM
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First Tow with Diesel

Quote:
Originally Posted by dsent View Post
,

Hope you are well, Here is my first tow. no problems or high temps.

Not in the higher elevations as you guys out west, but up threw the Adirondacks.

I have the tow package on my Limited and use P3 brake controller.

I have a reese like this one but mine is 14000lb,not that I tow that heavy but was one sale from the same guys at etrailer.

Reese SC Weight Distribution w Sway Control - Trunnion - 12,000 lbs GTW, 1,200 lbs TW Reese Weight Distribution RP66155

The area where the trunion bars rest on the brake pad material. The longer this area is the more sway control you will have.

I have pulled 5k load and 7k load behind the Jeep with no problems.
I pulled 5k from SC to Peekskill NY and got 20-22mpg, the 7k load was a milling machine I pulled from Groton Ct to Peekskill then to Watertown Ny threw the Adirondacks getting 12-16 running 60-65.

Here's the 5k load when I sold my 1984 190d.









Loving my Jeep ECO.

Not sorry I got rid of 12 Ram 2500 with all the problems it had 38 days in the shop in 14 months of ownership.

I am able to pull the same loads with the Jeep as I pulled with the 2500, but get way better mileage!!

I purchased some temp slip on mirrors for better view of the load and to be able to see around the load. Trying to find some with better fit and less vibrations.

I would guess your way over sprung using 14K bars. The stiff hitch will beat up the trailer. It may not matter with a flat bed. But, it makes a difference with a camper. I would like to suggest you take the rig the the CAT scales and see what the weights are on the axels. Then adjust the spring bars so the weights are equal on the front and rear of the Jeep. You may have to tilt the hitch head to get the bars horizontal.

I use Arrow mirrors and they work great.


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  #44  
Old 08-18-2015, 09:08 AM
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Re: First Tow with Diesel

Olivia,

Worry not.....we've been towing our Lance 1685 TT since October last year.
When travelling, usually weighs in around 4600lbs.

We use an Andersen WDH.....which is MUCH lighter than, say, a Blue Ox and thusly less hitch weight.

We've put about 7000 towing miles on our JGC Diesel and I've seen oil temps hit 260, trans temps hit 210 and engine coolant temps nudge the "red quarter" when climbing the mountains in NM and CO. FYI - Normal trans temp is around 200F for the 8HP70. I also use paddles to shift to around 3000rpm when climbing

All systems work just fine as all temps quickly go "back to normal" aka cool down quite quickly .
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  #45  
Old 08-18-2015, 12:24 PM
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Re: First Tow with Diesel

Guys,
Neither me and my husband are expert in diesel engine particularity in GC diesel engine which seems to have its own specific heat ranges.
Our GC did not overheat, but we did not allow the heat to come up to the numbers that you are mentioning.
Our max towing heating numbers were:
Temp gauge was in the middle of the third quarter.
Oil temp was max at 248
transmission temp was max at 203.

We also noticed that the coolant level was reduced little bit, we are not sure the reason for that. Did anyone experience coolant level drop during towing?

Also on the way back home after returning the RV trailer in Salt lake city, when climbing the grades (I-80), with no towing but with around 800 lbs load on the car, the temp gauge was climbing to the middle of the third quarter and the oil temp was at 248. We were driving in sport mode and the speed was around 65-70. I am wondering if this is an expected behavior from this car.
We did not expect the engine temperature to raise with no towing load.


We learned lessons during our first RV towing experience.
The RV dealer rented us much larger equalizer (for 14000 lbs trailers), it was very heavy. We had to load everything to the back of the trailer to compensate for heavy tongue weight of the trailer.
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  #46  
Old 08-18-2015, 02:39 PM
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Re: First Tow with Diesel

Olivia,

If you haven't tried an Andersen WDH, they are very easy to install and use and are lightweight. Check out the video

Also, don't fret about the engine and oil temps. Unlike other manufacturers gauges, the Jeep gauges pretty much reflect an accurate representation of what is going on with your engine and gearbox. Provided you do not get an EVIC message about overtemp issue with your engine and gearbox, don't sweat the small stuff.

Our 8HP70 gearbox can handle 250F fluid temps and the engine oil (Pennzoil Ultra Euro L 5W30, being synthetic, has a flash point of 420F and so can easily handle temps in the 260F range.

Diesels are made to run hot as they do work better in higher temps.
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  #47  
Old 08-18-2015, 06:22 PM
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Re: First Tow with Diesel

Just towed my 6,000 lb boat 1300 miles from Austin Tx to Lake Powell (Page Az) full of gear. Drove 65-75 in high temps. Watching the gauge climb also but it never exceeded 256. Outside temps were in the high 90's to low 100's. The jeep tows like a champ. I averaged 16.5 mpg. Double the mileage I got from my truck the past two years towing the same boat to the same place and it was stronger on the hills. Last year I spent $1050 in gas round trip. This year less than $400. I could not be more pleased.


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  #48  
Old 08-18-2015, 09:24 PM
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Re: First Tow with Diesel

Quote:
Originally Posted by philbytx View Post
Olivia,

If you haven't tried an Andersen WDH, they are very easy to install and use and are lightweight. Check out the video

Also, don't fret about the engine and oil temps. Unlike other manufacturers gauges, the Jeep gauges pretty much reflect an accurate representation of what is going on with your engine and gearbox. Provided you do not get an EVIC message about overtemp issue with your engine and gearbox, don't sweat the small stuff.

Our 8HP70 gearbox can handle 250F fluid temps and the engine oil (Pennzoil Ultra Euro L 5W30, being synthetic, has a flash point of 420F and so can easily handle temps in the 260F range.

Diesels are made to run hot as they do work better in higher temps.
What's the difference between this hitch and a typical WDH with torsion bars? I have an e2 brand rated for 800lbs hitch and 8000lbs trailer and it has the torsion bars and not chains. However it's crazy heavy but this Andersen hitch looks very light.
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