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6.4/3.73 towing 5th wheels
- Thread starter raven_dt
- Start date
Hopefully, looking to see how the 3.73 handles the 5er and typical mpg.
Limey
Active Member
Mine handles my 31ft Cougar 27SGS just wonderfully. Average over the last 3 trips (total of 2000 miles) has been about 10mpg.
We just bought the Cougar 24RDS, 28.5 feet long but we are still waiting for our Truck
What kind of mpg typically?2021 Tradesman 6.4L/3.73. 2017 Coachman Chaparral 295bhs. Trailer is just under 36', 11000 lbs loaded with 1750 lb pin weight.
Pulls like a dream!
2021 Tradesman
6.4L
3.73
Nuke1
Member
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Towing average is 10.62 mpg. I'm kind of "old school" and write down miles and gallons at every fill up and whether towing or not.
I drive my company truck most of the time so doing this isn't such a big deal for me.
I've towed the fifth wheel 1817 miles and have put in 171.1 gallons of fuel.
Lary0071
Well-Known Member
So you guys are killing the standard output 6.7L Cummins in MPG. I just did a 700 mile trip to Myrtle Beach and back from Pittsburgh Pa area with my Grand Design 311BHS (3K pin weight, 11K on trailer axles, 37' long) and averaged a solid 8.4 every time. I should have kept my old 2019 2500 6.4L. I'm not that impressed with the Cummins from a MPG or a power standpoint compared to my 6.4L with the ZF 8 speed. I suspect that I just wasted $75K and will will regret it. And to rub salt in that wound, I have a 22 longhorn ordered with the same 6.7L... I could save $10K and gain MPG by walking on the order and re-ordering a 6.4L.
Firebird
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I only average 8.5 to 9.5 towing my travel trailer, but I do have 4.10 gears. The 6.4 pulls easily, but I've never been able to hit 10 mpg
How many miles? I was saying the same thing up until about 15k, numbers are actually getting decent for what I'm doing now. My towing numbers at way too fast, are basically matching the 16 PW (Hemi 6sp) was getting empty. The elevation out here also sways in the diesel favor for me though.
Lary0071
Well-Known Member
My truck does have the 6.7L S.O. Cummins with 4.10 gears and 14K GVW.
I had 2,200 miles on the truck when we left for Myrtle Beach. I'm just about to crack 4,000 miles this evening. I'll be doing a 7 hour round trip to pick up a 2013 Nissan Frontier that stuck a connecting rod out the oil pan on Sunday. I'll be pulling a 22' Iron Bull equipment trailer to do the hauling.
Nuke1
Member
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I'm sitting at a touch under 9000 miles right now and the mileage has been improving since driving it off the lot.
We're heading on a 600 mile round trip over Labor Day weekend and I'll update with how it does. This will be the longest trip with the camper so far so I'm looking to forward to seeing what it'll do. Most trips are 100 or so miles one way.
We're heading on a 600 mile round trip over Labor Day weekend and I'll update with how it does. This will be the longest trip with the camper so far so I'm looking to forward to seeing what it'll do. Most trips are 100 or so miles one way.
Limey
Active Member
Last big trip we did was from Florida Panhandle to St Louis area and back. Did around 2000 miles and averaged right on 10 mpg.
Lary0071
Well-Known Member
At 8.5 mpg and 31 gallon tank..... well.... you can do math. Estimate 200.
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H3LZSN1P3R
You're doing it wrong
The 4.10 gears are putting you to high in the rpm anything below 2 grand is good after 2000 fuel disappears fast, unless i was towing 25K+ regularly i would avoid 4.10s unless you throw some 35s on to get that rpm down
Limey
Active Member
No need. Trailer and truck sit almost level and the ride is great.