2011 Cummins towing 11,500lbs - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 49 (permalink) Old 10-18-2010, 03:21 AM Thread Starter
& amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; quot ;Mis s me yet&a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;q uot; George Bush
 
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2011 Cummins towing 11,500lbs

I have had the opportunity to spend a little time in a 2011 Dodge Ram, 2500, Crew Cab, 4X4 Cummins, 6 speed auto, SLT. I like it but it's not the power house I expected it to be.

The interior is very comfortable for me, and the back seat room is nice much better than the older quad cabs, looks to me like it's the biggest rear seat space on the market. The cup holders fold down from the dash with lots of storage however they are to close to the dash to allow for larger cups. Lots of interior storage and it is very useable, my model is the split bench allowing for 6 passengers.

Controls are ok, I say only ok due to the fact that the tow/haul and engine brake switch are both in the center of the dash making you constantly reach for them when towing. The 6spd auto controls leave allot to be desired, the gear shifter lets you select P R N D past that you must use the + and - buttons on the shifter, this is fine when stopping and going from 6th to 1st gear however then you have to once again cycle each gear to get up to Drive (this sucks as each gear cycle seems to take about 1 full second) I have found myself shifting it up to Neutral and back to Drive to avoid the long wait and the many selections of the + button to back to Drive.

Normal driving engine is great, quiet, and runs good. Ride is good, handling is good, and braking is great. Comfort is superb, I am 6'3" and love it, I can easily ride in back to with ample leg room, but head room is a little tight. I like to drive with the windows down but not in this thing, it feels like you are in a wind tunnel, once one of the rear windows goes down the air resonates and creates allot of pressure in the cab at highway speeds (exactly the same as my 2005 Ram Quad Cab 2500). The tires were first inflated to 80psi and would beat you to death, I deflated them to 58psi and the ride is much better but now the low tire light is on and will not clear. This truck is equipped with light load tire inflation button for this purpose but the message center says it cannot be used and needs to inflate the tires properly? Tranny shifts very firm and seems to jar you a little too much.

Towing this is my big issue as I tow allot in the mountains at elevations from 1,500' all the way up to 9,100' on a regular basis. My trailer is a 33' tri axle toy hauler that tows great but weighs between 11-14,000lbs depending on how we load it and who’s tagging along. For the test it should have weighed in at 11,500-12,000lbs I did not weigh it but have weighed it enough in the past to have a very close idea as to its weight. The route was AZ highway 87 north from Phoenix area 70 miles to AZ HY 188 and back. This route will take me up and down constantly from 1,300’ up to 5,000’ elevations with up to 7-8% grades. It tows great and is the driver has a very in control attitude behind the wheel of this rig. The engine braking is awesome but once again requires you to turn it off and on continuously and the button is centered in the dash making it a little inconvenient. Tranny smoothes out nicely with the trailer hooked up to it and seems to be right at home with it in tow.
The big dog power house that I had hopped to see in the mountains never got off the porch for my test drive though. The power was more than just a little disappointing with the toughest spot of the tow having a top speed of 47mph, I expected much better numbers than this as my lifted 2004 8,700lb Excursion rollin on 35’s will tow this exact same hill and load at 50 mph. If this engine and tranny can be safely tuned to tow with and get some extra ponies it would be a great truck, but in stock form the power numbers just don’t add up in the real world. During this tow I saw 8.7mpg on the lie o meter, the one on my X will show 7.8-8.0mpg on the same trip.

See pics and videos below.




Last edited by WasGas; 10-18-2010 at 03:28 AM.
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post #2 of 49 (permalink) Old 10-18-2010, 03:46 AM
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Just wondering what axle ratio was in the truck. My 5th wheel weighs around 12,000lbs and my 07 6.7 will pull the grades you are pulling in the 50-55mph (have 3.73 axle). I agree the having the EB switch in center of dash is not the best place, actually its a PIA, although tow/haul switch is on the shifter (did dodge move it to the dash in 2011?).

Shifting up with the +/- just hold the + and it will jump all the way into D. Don't need to press + for each gear unless you want to select each gear for manual shifting

Remember not to talk bad about farmers with your mouth full!
2013 6.7 CTD 2500, 800 ft-lbs torque, 4x4 crewcab Larmine Longhorn edition, 6 sp. auto, 2 tone white/gold
--07 6.7CTD 2500 4x4, Quad Cab, Big Horn Pkg. 3.73, airbags, 6sp auto, with Mag-Hytec deep pan.- sold but not forgotten.
--08 36' Jazz 5th wheel,triple slide, 12,000lbs
--28' 22,400# PJ goosneck beaver tail trailer
--95 & 96 5.9CTD 4x4 5sp. ext. cab. 33x12.50x16 front, 33x15.50x16 rear tires. R-1 tread, wheelbase shortened 30". Used as tugs on farm
--81 IH 1800, DT466 210hp, 10 speed,
--95 FL70, 8.3 cummins 275hp, 10speed
--79 GMC 7000, DD 6V53 210 hp, 6sp ally
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post #3 of 49 (permalink) Old 10-18-2010, 04:29 AM Thread Starter
& amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; quot ;Mis s me yet&a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;q uot; George Bush
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Yeah I am not sure of the axle ratio, it could be a 3.42??? Yes the TH switch was moved to the dash. And now that I know by holding the +/- down will take you to the top or bottom of the gears it makes it much better, but I still like the GM/Allison set up much better P R N D M

PS I forgot to comment on the integrated trailer brakes. It's location and visibility is hard to use, it took me a little to get it set up for my trailer however once I found the sweetspot 5.5G for mine it was great to use.

Last edited by WasGas; 10-18-2010 at 04:32 AM.
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post #4 of 49 (permalink) Old 10-18-2010, 06:03 AM Thread Starter
& amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; quot ;Mis s me yet&a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;q uot; George Bush
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7% grade hill


6% down grade with engine brake
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post #5 of 49 (permalink) Old 10-18-2010, 05:43 PM
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This is a good write up! I hate sounding like a punk kid, but something doesn't add up. I've pulled that very hill with my old boat approximately 10,600 lbs at 70 mph. My truck was an 07.5 with 3.73's and at the time was completely stock. I have to think that truck had 3.42's or something. Because I'll tell ya, I've had an 06 F-250 with a 6.0 and I will say this, there ain't a snowballs chance in hell that my powerstroke would have ever been close or even in the ballpark on keeping up with my 6.7 pulling a hill!

Dominic
'16 Ram 3500 Limited, DRW, 3.73's, Aisin, 4x4
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post #6 of 49 (permalink) Old 10-18-2010, 06:47 PM
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Just how many miles on the truck, since its a 11, I would venture to say the engine is not broke in. The Cummins defiantly picks up power and mileage as it gets broken in.

Remember not to talk bad about farmers with your mouth full!
2013 6.7 CTD 2500, 800 ft-lbs torque, 4x4 crewcab Larmine Longhorn edition, 6 sp. auto, 2 tone white/gold
--07 6.7CTD 2500 4x4, Quad Cab, Big Horn Pkg. 3.73, airbags, 6sp auto, with Mag-Hytec deep pan.- sold but not forgotten.
--08 36' Jazz 5th wheel,triple slide, 12,000lbs
--28' 22,400# PJ goosneck beaver tail trailer
--95 & 96 5.9CTD 4x4 5sp. ext. cab. 33x12.50x16 front, 33x15.50x16 rear tires. R-1 tread, wheelbase shortened 30". Used as tugs on farm
--81 IH 1800, DT466 210hp, 10 speed,
--95 FL70, 8.3 cummins 275hp, 10speed
--79 GMC 7000, DD 6V53 210 hp, 6sp ally
-- A whole bunch farm equipment, all colors
singles club # 198
WALNUT MEMBER #11(workers aganist lazy non-producers united together)
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post #7 of 49 (permalink) Old 10-18-2010, 09:23 PM Thread Starter
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How can I tell the gear ration? It has about 3k on the clock so no it's not fully broke in but I doubt any of the trucks doing the actual truck tests are broke in either?
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post #8 of 49 (permalink) Old 10-18-2010, 09:53 PM
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Quote:
Originally Posted by WasGas View Post
How can I tell the gear ration? It has about 3k on the clock so no it's not fully broke in but I doubt any of the trucks doing the actual truck tests are broke in either?
I know ~1500 rpm 6th gear gives 60mph with 3.73 gears, stock tires.

3.42 gears would equal ~1375 rpm at 60

Remember not to talk bad about farmers with your mouth full!
2013 6.7 CTD 2500, 800 ft-lbs torque, 4x4 crewcab Larmine Longhorn edition, 6 sp. auto, 2 tone white/gold
--07 6.7CTD 2500 4x4, Quad Cab, Big Horn Pkg. 3.73, airbags, 6sp auto, with Mag-Hytec deep pan.- sold but not forgotten.
--08 36' Jazz 5th wheel,triple slide, 12,000lbs
--28' 22,400# PJ goosneck beaver tail trailer
--95 & 96 5.9CTD 4x4 5sp. ext. cab. 33x12.50x16 front, 33x15.50x16 rear tires. R-1 tread, wheelbase shortened 30". Used as tugs on farm
--81 IH 1800, DT466 210hp, 10 speed,
--95 FL70, 8.3 cummins 275hp, 10speed
--79 GMC 7000, DD 6V53 210 hp, 6sp ally
-- A whole bunch farm equipment, all colors
singles club # 198
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post #9 of 49 (permalink) Old 10-19-2010, 03:30 AM Thread Starter
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60 mph in 6th gear reads 1500 rpm on stock tires.
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post #10 of 49 (permalink) Old 10-19-2010, 03:41 PM
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Quote:
Originally Posted by WasGas View Post
60 mph in 6th gear reads 1500 rpm on stock tires.
I am at 1850 r.p.m at 65 mph with 4:10. That is with 265-70-17 tires.

2010 6.7 cummins 4x4 crew cab short bed 6 speed auto 4:10 gears stock for now. Draw tite brake controller
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