2500 crewcab with 350 heavy towing

[phule]

3.73s on my c2500 as well

 

[Zack88]

What type of fuel economy do you guys get towing? I pulled the cats and have it simulated so no check engine light and it all seems to run well but this thing is just a horrible pig on gas!!

We averaged 6.5 mpg pulling a 4k lb jeep on a 2k lb trailer through a mix of hills and flat ground 99% highway.

I had overdrive off the entire time and average speed was 68mph at 2700rpm with the ac on, I'm very disappointed in the horrendous economy and I don't see anyway I'm going to drag the goosneck behind this truck as is I'm lucky to run 50mph at the top of some hills without it being in second gear and 4k+rpm the whole way up them just using an 18 foot bumper pull.

 

[88GMCtruck]

I was wondering about actual weight on the camper, my buddy just bought a ten footer we put on a 28 foot goose and the tag said 1,800lbs full of water,propane and 75lbs of ice in the fridge is where my guesstimate came from on weight.

I've never in my life seen a camper that light, unless it was a pop-up

You guys don't see 3/4 ton 8 lugs with 3:73's that often??

2 of my 3 (8600GVW) trucks have 3:73 gears, one of which is a 3500 crew cab. Honestly it just may be what I've run into, but most of the 3/4 tons I've seen have been 3:73 gears... for me personally it's harder to find the 4:10's unless it's a dually.

88GMCTruck what gears did your old 6.5 have?

Yeah, to be totally honest, -almost- every single 8 lug 2500 I've ever owned or worked on, 4.10's all day long. The one exception I can recall is a '91 RCLB 350/4L80E that had 3.73's, was a bare bones Cheyenne with a flatbed. On the other hand, all the 6 lug 2500's I see tend to be 3.73's.

Richard

Typically 6.5L trucks are 3.42 or 3.73. Occasionally 4.10s. Gas trucks are most commonly 4.10s, less commonly 3.73s and rarely 4.56.

What type of fuel economy do you guys get towing? I pulled the cats and have it simulated so no check engine light and it all seems to run well but this thing is just a horrible pig on gas!!

We averaged 6.5 mpg pulling a 4k lb jeep on a 2k lb trailer through a mix of hills and flat ground 99% highway.

I had overdrive off the entire time and average speed was 68mph at 2700rpm with the ac on, I'm very disappointed in the horrendous economy and I don't see anyway I'm going to drag the goosneck behind this truck as is I'm lucky to run 50mph at the top of some hills without it being in second gear and 4k+rpm the whole way up them just using an 18 foot bumper pull.

I just made a 1,700 mile trip towing 18,000 LBS (truck, 12' camper, 16' car trailer with a CJ5 and Suzuki quad) and got a solid 7 MPG.

 

[Keepinitoldskool]

I've never in my life seen a camper that light, unless it was a pop-up



Typically 6.5L trucks are 3.42 or 3.73. Occasionally 4.10s. Gas trucks are most commonly 4.10s, less commonly 3.73s and rarely 4.56.


I just made a 1,700 mile trip towing 18,000 LBS (truck, 12' camper, 16' car trailer with a CJ5 and Suzuki quad) and got a solid 7 MPG.

You also have a 454.

 

[88GMCtruck]

Forgot that part lol

 

[Zack88]

We decided to go ahead and sell the old girl and step up to a modern diesel, the hills seem to work it awful hard and I don't like the idea of spinning a 200k mile motor at 5k rpm for the entire length of them to keep decent speed. Plus when we were left stranded last Friday pulling my jeep on the trailer and after repairs it took 10hrs to make a 2.5 hour trip my wife is done with it! I just don't see any reason to pull the guts out of a perfectly good truck when someone else can use it for a better suited life.

 

[RyanMerrick]

Yeah, to be totally honest, -almost- every single 8 lug 2500 I've ever owned or worked on, 4.10's all day long. The one exception I can recall is a '91 RCLB 350/4L80E that had 3.73's, was a bare bones Cheyenne with a flatbed. On the other hand, all the 6 lug 2500's I see tend to be 3.73's.

Richard

Mine is an 8600gvw 2500 with 3.73s also... but it's not a problem with the NV4500

 

[Zack88]

We were intending on selling this and buying a late model diesel, the better half wants a mega cab and I won't own an automatic dodge so we were looking at $30k + for a truck with decent miles and that's not in the cards with our other needs right now..

This truck does have 3:73 gears, 99% of it's use is towing. How bad would I be to swap 4:56 gears in it? I understand gear ratios and their effects I'm just curious how these trucks respond to lower gears. It has 265/75 16 all the way around on it now.

 

[Keepinitoldskool]

4.56 would be a huge improvement for it.

 

[98sierra4x4]

Even 4.10s brobably


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