I don't want to open up the can of worms about what you call the system or it's effectiveness. I just want to know if anyone has a Chassis Cab. And if the system works/doesn't work does it accomplish this the same with the different turbo that is on the CC? I'm still waiting for my F350 Lariat,dually chassis cab and just passing time educating myself. I will be pulling 31' Alumscape, truck will have 4.10 LS rearend. Of course don't know when I'll see it, ordered 15th Nov. This forum is a wonderful source of information!! Thanks for everyone's input....

 

Hi Jim,

I don't have a chassis/cab truck, but I'm pretty sure it'll have the same type of exhaust brake. I know it has a VGT, which is the mechanism which the PCM uses to increase backpressure to provide braking force.

Unfortunately because the chassis/cab trucks aren't as common it's much harder to find information on them. I'll see what I can dig up after work tonight.

 

it's the same, your computer uses the transmission torque converter lock up and the variable geometry turbo to make back pressure. On another thread they say about 100 HP of back pressure. This is not the same as the exhaust back pressure valves used by BD or others and used on the cummins, which is probably a bit more HP in back pressure. However, they would work adequately holding back a larger trailer if you are in tow haul and tapping the brake pedal to shift down. Keep in mind it won't shift and over rev, but it will hold back. You will have learn how to make it work best for your weight of trailer. Ther are other threads on this topic to read up on. I think unless you fly over the top and have to much speed, you will be fine.

 

Thanks Tom, I appreciate anything I can learn about my CC. Though the pickups and CC share the same basic engine I keep finding other differences. Of course the rated 300 HP for CC vs 400 HP for the PU is the most glaring difference. I have to admit this bothers me. I only use truck for pulling 5th wheel, and I never drive over 62-65 mph, and only 55 in California. At 63 I was just sick of trying to get things in and out over the side of the bed of my 04 F250 4x4. So am going with aluminum bed, RDS aux tank and Super5th. I didn't even get 4x4 for first time since 1983. I think the 04 was in fourwheel twice. And one of those was just to see if it still worked. I hope I didn't make a big mistake with the 4.10LS, if so dealer is going to order after market 3.73LS and install. I just did not want a non rear slip differential since it's two wheel drive. I sure wish there was an area for us CC owners. Thanks in advance...

 

I use the tow/haul for retarding force going in and out of Flagstaff, Colorado River at Ariz/Cal state line and Hiway 58 at Tehachapi. It's ok on my 04 but still have to use brakes. I'm curious how much better, if any, the 2011 system will be. I'm kinda an old grandma when I tow, but I'm just never in a big hurry. I just stay over and let everyone pass. Make our trip out west from Kansas every summer. Hope the new truck does a good job cause they sure cost a lot. Thanks to all....

 

This is the single best piece of advice given to date. I have tried to point this out before but never so well with so few words. Early in my travels with my 13000 pound fifth wheel, I wondered about the engine brake effectiveness as well. The problem is not with the descent. The problem is with the ascent. The truck has so much power it will climb the big hills much faster than it can go back down. 3.5 miles of 9% uphill pull can be accomplished easily at 65 mph. If you try to use engine braking only when you go over the top at that speed you will be disappointed. After a few trials, I discovered that my rig, at 22300 pounds GCVWR, required a descent speed at 50mph or lower. The engine brake will hold it at that speed all the way to the bottom of the 9% grade. Now I just climb up to the top, coast over the crest until my speed is at 50mph or less and tap the brake. If the descent requires a lower speed, I just tap it again. Otherwise, I just enjoy the ride down.

Regards

 

Jim,

I just read your last post. Like you are doing, I went from a 2004 6.0 to my present 2011 6.7 truck. I was running an SCT tuner with an Innovative Diesel heavy tow tune. While the exhaust brake programming worked with the 6.0, the 6.7 is a nicer package overall. If you were satisfied with your 6.0 performance, you will be very pleased with your new truck. JMO but I do have some experience.

 

Well like I said I'm kinda a grandma when I tow. My Alumascape is 10,500 empty and we carry no water and don't take much. Buy everything we need when we get to Travis AFB where we stay all summer. The only reason I even bought the new truck was to go from SRW to DRW. And, I only did that because of the wind we always have to contend with between Kansas and TAFB. I'm just looking for more stability and OK maybe I wanted a new truck. This Chassis Cab will be first I don't even know anyone who owns one. My dealer sells a lot of them but they are all farm use, so not at all the same end use. Will the transmission still down shift when in tow/haul like my 04 does when I tap the brake? I also have found the exhaust, def tank, engine programming, fuel tank and of course the frame are different. I sure pray I find no horrible mistakes I made with the choice of this truck, if so my wife will kick my..............

 

Jim, I too have ordered, just before Christmas. my truck is not scheduled yet, & I have made changes along the way. If you are having 2nd thoughts, & its not scheduled yet, you could maybe test drive a couple different trucks out. I don't think you will miss 4 wheel though in your part of the world, & your truck will be somewhat lighter.( how about the DRW F350/450 400/800 version & sell the box outright)

 

The tow/haul/engine brake is completely integrated. Use tow/haul when pulling your fiver up those hills and just tap the brake when you crest the hill. Enjoy the ride. Want to go slower? Tap the brake again and you lose about 10 mph. Sit back and enjoy the ride.

Your 6.0 had 25 more horsepower than your new 6.7 but IIRC the ratings are figured differently. Your fiver is 2500 pounds lighter than mine. You will love the smooth quiet power and the new transmission is even smoother than the one in your current truck. BTDT. The new interiors are very quiet and comfortable.

You will be in fine shape trucking that rig down the road. Stop worrying...no ...kicking coming from your wife...at least not for your truck decision

Regards

 

Hey Rick, you sound like my wife. Like I said I ordered this 15 Nov and still haven't seen it. Dealer says it was built 17 Jan and they had a dealer delivery date of 28 Jan.The longer times goes on the more I worry. I stewed over the Chassis cab vs Pickup for almost two years. I have the aluminum bed manufacturer waiting and the upfitter waiting and RDS waiting. Well you get the idea...waiting!! Every day that this goes on and I'm not able to get the new truck ready to tow I get more nervous. Dealer already found the rear end to put in if I don't like the 4.10LS. I'm driving my dealer, mechanic, bed manufacturer and upfitter all crazy I' sure. They are all really good people though and they realize a lot of money is involved in these decisions. If it doesn't get here soon I think my wife is going to have me committed, or at least take my laptop away. Thanks for everyone, can't tell you how much I've learned here.

 

[quote=jim48;9939566]Though the pickups and CC share the same basic engine I keep finding other differences. Of course the rated 300 HP for CC vs 400 HP for the PU is the most glaring difference.

I thought I read somewhere that you had to get to the F-450 before they lost 100HP. I too am in the market for a cab and chassis, just having a hard time finding one.

 

Well, I think all chassis cab diesels are 300HP. My dealer's diesel mechanic tells me I'm a big worry wort and since I tow like an old grandma I would never have used the extra HP anyhow!!! Only have 77K on 04 and never gets out of the garage unless towing. Dealer taking it in on trade-in, they said it doesn't look like it was ever out of the garage. I live in Kansas and our dealers around here sell lots of CC. Farmers use the heck out of them with steel beds and hydraulic hay hooks. Of course that's nothing like my planned use.