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Old 01-25-2014, 07:54 PM   #1
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2014 Grand Cherokee Eco Diesel

Just test towed my 25' with a Grand Cherokee Eco Diesel and was greatly disappointed with potential over heating. Starting in Denver, with very little wind at 55 degrees, and driving west on I70 to Silverthorne and back each grade would send the temp to near limit. From Silverthorne east bound to the Eisenhower tunnel I started with the cruise at 60 and engine normal temp, as it had cooled on the way down, then the temp quickly started rising till just a half tick into the red half way to the top while my speed dropped to 45. The outside temp during the pull was only 36.

I found that I could not down shift into a higher rpm when I felt it should have allowed it. It will also not hold a gear going down hill. It would up shift around 3200 rpm. Hit the brakes really hard drop the speed to 45 and then it would go back to 4th but would pop out shortly after that.

Returned to the dealer with sales manager ready to close the deal until I went over the pictures taken of the temp gage and we discussed the lack of power pulling less than 6,000 pounds.

On the bright side I got 15mpg with the 155 mile round trip.

It is a very nice vehicle but disappointed with the heat issues.

Wait and see what the dealer/regional rep has to say on Monday.
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Old 01-25-2014, 08:06 PM   #2
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Odd that such a basic thing is cropping up. Modern vehicles are assumed to have this stuff down.
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Old 01-25-2014, 08:47 PM   #3
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I've been waiting for someone to actually post a review of the new Eco diesel grand cherokee as we were set on purchasing one for towing. I'm disappointed in its performance and hopefully it is some kind of computer glitch, etc. Were you using tow/haul mode? Not being able to downshift would not be good and getting it to hold especially on the passes. Thanks for giving this review. I hope that this can be corrected as we really wanted to buy one of these. Although we have a 1991 25' AS we had not really planned to use it to pull this but getting a smaller one with less weight as our classic is heavier than we
would want to use the GC to pull with. I look forward to hearing what you find out.
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Old 01-25-2014, 10:54 PM   #4
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Unfortunately there is no tow mode. I tried normal, manual and sport modes thinking maybe sport would allow higher rpm shift points but they seemed to be the same. One of the sales guys was telling me that the new diesel and 8 speed trans are very conservatively programmed. I think I read where they were sitting in limbo at the factory production lots while they were trying to finalize the software prior to hitting the dealer lots. They still have a ways to go. The indicated red line is somewhere close to 5k but I donít think it ever got much over 4. Low end slow rolling torque is just incredible but it is horse power that gets you up the hill and there it is lacking.

If the dealer comes back with a fix for the overheating I may try it again, but I really hate to have no power reserve at all going up the grades. Would just need to get behind the big rigs and settle in at 40. If we lived in CA or FL it might be much more tolerable.
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Old 01-25-2014, 11:42 PM   #5
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Very odd, I towed a heavier 2009 Classic 25FB coast to coast with multiple stops at SteamBoat Springs - my TDI Touareg had zero issues, plenty of power with no heat issues, once was in late spring while other was in late summer x2....

Denver up 70 right through Silverthorne 3 times....

Few pounds less torque than the Grand Cherokee too, btw, curious how my 2014 SRT Grand Cherokee would do with 470lbs torque and 470 horses...

Any Hoots, Odd on the GC oil burner, something has got to be off.....
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Old 01-25-2014, 11:57 PM   #6
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With the price of the GC and it's supposed towing capacity, something isn't right. It's hard to believe that it is running so hot. That's scary in itself. Unfortunately we may have to rethink our purchase unless I start reading positive results. We go camping in Colorado almost every summer and pull a lot of passes and surely don't want to spend that kind of money on something that overheats and doesn't have enough power. It will be interesting to see what the dealer comes back and says on Monday.
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Old 01-26-2014, 12:14 AM   #7
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John, What speed were you able to maintain pulling east to the Eisenhower Tunnel! What about coming out of SteamBoat Springs back toward Silverthorne?


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Originally Posted by JFScheck View Post
Very odd, I towed a heavier 2009 Classic 25FB coast to coast with multiple stops at SteamBoat Springs - my TDI Touareg had zero issues, plenty of power with no heat issues, once was in late spring while other was in late summer x2....

Denver up 70 right through Silverthorne 3 times....

Few pounds less torque than the Grand Cherokee too, btw, curious how my 2014 SRT Grand Cherokee would do with 470lbs torque and 470 horses...

Any Hoots, Odd on the GC oil burner, something has got to be off.....
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Old 01-26-2014, 05:19 AM   #8
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Seems there was another thread along these lines, there are some grades (and certainly ambient temps) that will test it more than I-70. Since the Fiat diesel is a $4500 option in the Jeep I'd be darn sure of its capability before pulling the trigger. Was really hoping the Jeep would succeed as a TV but if you need a good diesel SUV then Mercedes ML or GL might be options for you. The ML is not much more than a loaded jeep (diesels are a no-cost option with M-B).

Not Jeep bashing though, seems like a software change should address how the 8 speed trans handles grades. The RAM 1500 is the same power train and they have to get it right for that segment, else Ford EcoBoost 150 will steal all their thunder.
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Old 01-26-2014, 10:36 AM   #9
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The Ram 1500 Eco Diesel does have a tow mode, integrated brake controller and will obviously have better cooling systems but it will also be 1,000 - 1,500 pounds heavier.

Starting to research the German models but really did not want to go that way again. Last MB wagon we had cost us a small fortune in service and maintenance. Finally through the towel in around 100k miles (traded in for a Toyota) and said we would never buy another MB. My daughter still drives the Toyota with over 150k miles and we have spent a 1/10 on it as compared to the MB.


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Seems there was another thread along these lines, there are some grades (and certainly ambient temps) that will test it more than I-70. Since the Fiat diesel is a $4500 option in the Jeep I'd be darn sure of its capability before pulling the trigger. Was really hoping the Jeep would succeed as a TV but if you need a good diesel SUV then Mercedes ML or GL might be options for you. The ML is not much more than a loaded jeep (diesels are a no-cost option with M-B).

Not Jeep bashing though, seems like a software change should address how the 8 speed trans handles grades. The RAM 1500 is the same power train and they have to get it right for that segment, else Ford EcoBoost 150 will steal all their thunder.
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Old 01-26-2014, 11:07 AM   #10
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I am considering a Grand Cherokee with a 5.7 Hemi. I hunt and need the 4 wheel drive capability. Now we tow with an old Powerstroke and hunt with a smaller size 4x4. I would like to go with one vehicle. I like the idea of a moderate sized vehicle for city driving and the reviews for driving and handling are good, better than some of the bigger 4x4's with a frame on body such as a Nissan Armada or Toyota Sequoia. The Hemi might get 15-17 solo, but nothing like that towing.
On the downside, frequency of repair according to consumer reports is well above average for the V8. A new diesel made by Fiat does not inspire confidence.
Chrysler has a history of introducing diesel vehicles and then orphaning them. If I buy a Grand Cherokee, it will be with the old iron.
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Old 01-26-2014, 11:29 AM   #11
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A new diesel made by Fiat does not inspire confidence.
VM Motori makes the 3.0 Eco Diesel. VM has been around a very long time. It was once owned by Detroit Diesel, Penske, GM and now Fiat Powertrain. It is not a Fiat engine, as a RAM is not a Fiat truck and Jeep is not a Fiat SUV. They just share the same Corporate owners.

Hopefully Jeep and RAM will get their issues sorted out.
I sure would like a nice 1/2T pickup that can tow #9,000 and get over 20 MPG solo.
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Old 01-26-2014, 01:10 PM   #12
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My '13 Grand Cherokee with the hemi, 6 speed and tow/haul mode has proven to be an excellent tow vehicle for my car trailer as well as my 25 FB. Went from Durango to Georgetown pulling my car trailer over much the same route with no issues at all. No knock on the diesel, but I can buy quite a few gallons of gas that's cheaper than diesel for a $4500 difference. For the record, I also own a diesel Sprinter motorhome.
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Old 01-26-2014, 06:38 PM   #13
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John, What speed were you able to maintain pulling east to the Eisenhower Tunnel! What about coming out of SteamBoat Springs back toward Silverthorne?
Volkswagen 2010 Touareg TDI with V-6 towing a 2009 25FB Classic with Pro Pride Hitch - heading from Denver up to the Tunnel, steady 60-65 (70 was average) with no problems, from Silverthrone to SteamBoat Springs it's pretty flat until the very end, but I was nervous as this was 2010 and Ultra Low Diesel as not quite everywhere at that point, the power was never an issue....

Rabbit Ears pass too (Tunnel was all backed up) and because of the roads max average was 60.

The final pull up into and past Catamount Lake (or pulling out of Steamboat and over Rabbit Ears pass) was 60-65. That was a pull!
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Old 01-27-2014, 08:50 AM   #14
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John, Thank you for the feedback. On paper the Jeep should do every bit as good, but I am not going to risk it at this point. I am leaning toward the Touareg TDI and need to now find a used 2013 or hopefully 2014 that I can do the same test with. Warm regards, Howard



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Volkswagen 2010 Touareg TDI with V-6 towing a 2009 25FB Classic with Pro Pride Hitch - heading from Denver up to the Tunnel, steady 60-65 (70 was average) with no problems, from Silverthrone to SteamBoat Springs it's pretty flat until the very end, but I was nervous as this was 2010 and Ultra Low Diesel as not quite everywhere at that point, the power was never an issue....

Rabbit Ears pass too (Tunnel was all backed up) and because of the roads max average was 60.

The final pull up into and past Catamount Lake (or pulling out of Steamboat and over Rabbit Ears pass) was 60-65. That was a pull!
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