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Old 04-17-2014, 05:12 PM   #21
Join Date: Mar 2013
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Caught my brain fart, I was confusing GVWR and curb weight, silly me.

Silverado HD 2500 6.0 Crew Cab
2014 Roo 21ss
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Old 04-18-2014, 08:13 PM   #22
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I Use tow haul every time. Allows transmission to downshift and use engine for compression braking. saving your brakes. A big plus on hills. Try it with and without you can tell.

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Old 04-18-2014, 08:27 PM   #23
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ABSOLUTELY! With our duramax these things will pull just about anything, but with it in T/H mode the transmission shift points change, up shift takes longer and down shift comes quicker, huge benefits and we only tow 10k, I was also able to hook up the factory exhaust brake and that will stay engaged down to 20 MPH, so we feel very comfortable with our set up. Hardly ever use the brakes!
2006 2500HD CCSB 2WD 2014 Crusader 285RET
Nights camped in 2013 - not enough!, 2014 37, 2015 40, 2016 39, 2017 38, 2018 14
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Old 04-22-2014, 09:16 AM   #24
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I have a 2012 F150 with the EcoBoost and if any trailer is hooked up I have tow/haul engaged. With the 3.7 I strongly suggest you have it on when towing your TT
2014 Surveyor SC321BHTS
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Old 04-22-2014, 09:43 AM   #25
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Location: Dripping Springs, TX
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I leave it on when towing unless I hit a long flat stretch. Especially helpful when going down hills as it will automatically downshift for you.
Chappy and Liz
Dripping Springs, TX
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Old 04-22-2014, 09:54 AM   #26
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Had tow/haul mode on my 2010 F150.5.4...and..have it on My 2012 F250 6.7... I ALWAYS use it when towing
2014 Crusader 325 TE....2012.. F 250.. Supercab XLT, 4x2 , diesel....days camped 2011 ... 28.... days camped 2012...115 ... days camped 2013...155...2014...171 and counting
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Old 04-22-2014, 09:57 AM   #27
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Even towing on a long, flat stretch, I leave my tow-haul on. And mine DOES allow it to go into overdrive under those conditions, judging by the RPM's I'm seeing. Could be due to the weight on my trailer, which I tow at about 5,300 pounds.
2018 Coachmen Apex 249 RBS
2010 Silverado LT 5.3 V8

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Old 04-22-2014, 10:04 AM   #28
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Leave it on when towing. Saves the brakes and helps cool the transmission
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Old 04-22-2014, 10:43 AM   #29
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Our tow vehicle is a 2001 Silverado 2500HD, Gas, Ext. Cab. The owners manuals tells us that, towing in tow/haul should be used in hilly or rolling Taren as it cuts down on the downshift occurrences, on flat level ground, tow/haul is not necessary as downshifts are rare. Gas mileage is better when operating under the latter conditions. We have also discovered that when in cruise control and tow/haul engaged, the transmission on flat and level ground is much more sensitive and annoying.
Our coach is a Crusader 270RET Fifth Wheel, dry weight 7740, with 2740 additional gross weight allowed. The tow vehicle is rated at 12,500 GW.
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2500HD 6.0 Gas/Ext. Cab
2011 Crusader 270RET
2003 Sunnybrook T/T 30FIS
2012 Jeep Compass Limited
1985 S-10 One Owner:
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Old 04-22-2014, 10:43 AM   #30
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Location: Byron Center, MI
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In the majority of cases it's a good feature to use.

However - as long as the highway grade is minimal or flat, I'm in O/D. My 6L gasser pulls the 5er great in overdrive at 2,000rpm at 65 mph, and my trans temp never gets above 175F.


2013 Crusader 325RES Touring Edition
2006 Silverado 2500HD LT SW ECSB, 6L LQ4/4L80E 4.10s w/16K Curt slider (not necessary), Air Lift bags & Black Bear Performance tune & CAI

Norm & Karen Zondervan
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