2011 F-250 Diesel - Page 2 - Montana Owners Club

mlh · 11-25-2010, 06:42 AM

The braking system is different the F350 has Hydro-boost and the F250 has Vacuum boost.
Bill
They both have Hydro boost if they are diesels, since diesel engines produce no vacuum. The two trucks are exactly the same except for the axle ratio, springs. and the decals on them.

CamillaMichael · 11-25-2010, 12:22 PM

Quote:

quote:Originally posted by SDVIKINGRON

I recently purchased a 2011 6.7L King Ranch F350....it is the twelveth F350 I have had going back to the non-turbo charged 7.3L days. The comfort of the ride is great...I think it rides better than my wife's Navigator and I would sure rather drive it than the Navigator. I wanted the 2011 because its the first year ever that Ford had produced their own diesel powerplant and although I did not have problems with my previous 6L I had problems with the one before.I did extensive research before buying this truck and am overall happy. More power than any other 1 ton on the road. As usual though fuel economy is not as good as reported. I pulled my Montana with a pup behind that from SD to AZ (total rig 68' long) and got down to 8 MPG. Was not very happy about that although it is quite a load. I was getting 15 MPG unhooked. Ford sent me a recall letter (#10B17)to reprogram the chip. I had that done two days ago and now my unhooked MPG is 18. I was hoping for better fuel economy with the reprograming of the chip and got it. It also adds 10 more HP and 65'#s of torque. Stock the motor produces 390HP and 735'#s of torque so this brings it up to 400HP w/ 800'#s. I ordered the truck with the under bed hitch system by Reese factory installed. It uses the new Reese Elite 5th wheel plate system, I love that. I did not purchase the 5th plate system from Ford. It is a Reese anyway and I paid half of Ford's price on the internet. The new system has a hidden flat button half turn attachement,is quick detach and needs no other installation. One other note...my truck and all of my F350's have been single rear tire models. I have hundreds of thousands of miles pulling fifth wheels and goose necks and have never found that I needed duallys. Also I would never consider an F250...just personal preference.

Sounds like a great truck! Congratulations.

SDVIKINGRON · 11-26-2010, 02:07 AM

Thanks!

Gary Christy · 11-26-2010, 01:06 PM

Bill is right on the braking systems. The f250s have a vaccum pump for the brakes. Had one on my 97 f250. Now have the 2011 f350. Big differance in the handleing of the rig. As stated the new 2011 SD are increddible. Both power and ride. For the extra money 350 srw is the way to go. Dully if you tow extrem loads.

William H. Collier · 11-26-2010, 01:11 PM

According to Fords Specs the F250 6.7 does have vacuum boost brakes, it must have a vacuum pump. I posted a question over on the Dieselstop Forum and that has been confirmed by a guy who has one. The hydro-boost is supposed to have a larger caliper piston. You can read the answers to my question I posted here.

http://www.thedieselstop.com/forums/...r-axel-270498/

Bill

mlh · 11-26-2010, 01:15 PM

Where does a F250 diesel get its vacuum to work the brakes?

Gary Christy · 11-26-2010, 01:25 PM

There is a vaccum pump on the enginge like a power steering pump.

Gary Christy · 11-26-2010, 01:32 PM

Here is a video.

http://www.youtube.com/watch?v=X5OX1da9adA

illapah · 11-26-2010, 03:25 PM

BRAND NEW OEM VACUUM PUMP

1999 - 2010 Ford F-250 through F-550 Super Duty
2000 - 2005 Excursion
2003 - 2005 Dodge Ram 5.9L
Many other Diesel applications

Fits 7.3L, 6.0L and 6.4L Powerstroke Diesels

Original Factory Part - NOT Aftermarket!

- MADE IN THE USA -

In the last year, the market has been flooded with a cheap imitation of this pump which is built in China. We have diassembled one of our OEM pumps and one of the aftermarket pumps side by side. The difference in build quality is substantial!

What does this part do?

This vacuum pump operates the heater controls and four wheel drive front vacuum hubs on your Ford Diesel truck.
It operates the cruise control on Dodge trucks with the Cummins Diesel. (Note: If your Dodge is equipped with a jake brake, there will be a belt-driven vacuum pump.)

What happens when it fails?

Fords: Your heater defaults to defrost only, and your four wheel drive may not engage if the pump does not run at all. Dodge: Intermittent or inoppeartive crusie control. The pump may also fail and run continuously - in this case, there may be a leak in the system which the vacuum pump can not keep up with, so it runs all the time. Disconnect the outlet hose and plug the connection on the pump with your finger. If the pump stops running there is a leak in the system - probably a broken line, etc. If the pump does not stop running when you perform this test, it is bad and needs replacement.

Does this pump fail often?

Yes, this is a very common failure item - Ford issued a TSB number 05-17-4 to advise their technicians of this issue. Replaces Ford P/N 6C3Z-2A451-BA.

Is it easy to change?

Yes! Anybody with a few simple tools can do it! As easy as changing oil! On Ford 7.3L Powerstrokes the pump is located on the passenger's side inner fender between the battery and the blower motor.. It is easy to get to. Just unbolt it, unplug the wiring, and carefully dismount the old pump from the rubber "feet" and mount the new pump. Plug the wiring back in, and re-connect the vacuum hose to complete the procedure.

Can this pump can be used for other applications?

Yes! - vacuum control systems, science projects, etc. - It turns on when current is applied and generates a vacuum of about 17 in hg. It then shuts off until the vacuum falls to 13 in hg when the cycle repeats. It will NOT work to power a brake booster due to inadequate volume.

Pump Variations:

Please note that ALL Ford pickups up to F-550, as well as all Dodge pickups use the pump pictured above with the round electrical connector. Trucks larger than F550 and Motorhomes employ a similar pump with a different connector (with two exposed male spade terminals). If you are using the pump for a special application, the pump with exposed spade connectors is much easier to attach custom wiring to. Please be sure to select the correct one when ordering.

$106.99

mlh · 11-27-2010, 12:55 PM

Thanks Illaph thats a big help. I learned a lot.
Lynwood

RidgecrestDad · 11-28-2010, 07:05 AM

I agree with Phil and Cathy. I bought a 2007 F250 vice a F350 because the salesman told me the 250 could tow more. He was/is correct, about 500 more pounds total GCWR for my transmission type/axle ratio than allowed by an F350 auto trans/same axle ratio. However considering the king pin weight and loading in the truck I believe I would be better served with a srw F350 as it allows more weight in the bed.

The 2011 is pretty, and quiet. My neighbor recently brought one home and he says the power is awesome.

CamillaMichael · 11-28-2010, 07:11 AM

Quote:

quote:Originally posted by mlh

The braking system is different the F350 has Hydro-boost and the F250 has Vacuum boost.
Bill
They both have Hydro boost if they are diesels, since diesel engines produce no vacuum. The two trucks are exactly the same except for the axle ratio, springs. and the decals on them.

If you are talking about the brakes ("are exactly the same"), you may or may not be correct, but the 350 has a greater payload capacity than the 250 and is ,therefore, more suited to heavier pin weights...I think.

pineranch · 11-28-2010, 07:20 AM

Now we are getting around to my real question; What exactly gives it the larger payload, sticker, the one additional spring (helper spring) or slick marketing. I sat my 09 F250 next to an exact same F350 and the only differance I could see was the sticker and the helper spring. We had the same axle and wheels.
Mike

CamillaMichael · 11-28-2010, 07:38 AM

Quote:

quote:Originally posted by pineranch

Now we are getting around to my real question; What exactly gives it the larger payload, sticker, the one additional spring (helper spring) or slick marketing. I sat my 09 F250 next to an exact same F350 and the only differance I could see was the sticker and the helper spring. We had the same axle and wheels.
Mike

Well, I would not be Ford's choice for spokesman...I can, however, say I would not think a manufacturer, Ford, Chevy, or any other, would give you a GVWR higher than what they think the vehicle could actually bear...if they did, they would put themselves in an undefendable position. With that said, my 350 has a stated/written GVWR of 11,500 lb...do not believe you will find a 250 with those numbers. If the extra spring is all that is there to provide that extra capacity, then so be it. I would not want to get into a spitting contest over which is better/longer/stronger..., I can only relate what is clearly written...and I certainly do recognize that you can not always believe everything you see written. I can say without doubt that I have not had any "sagging" in my truck's rear end when connected to our Montana....

mlh · 11-28-2010, 12:38 PM

pineranch
The F350 has a greater pay load because, as you noticed it has heaver springs. Most of the time they have a lower axle ratio. The frame, all of the running gear, body, cab, etc etc are exactly the same. If you change the springs on a F250 to the F350 springs you will wind up with a F250 that is as capable of hauling or towing as a F350 SRW. Will it be a F350?, actually yes, legally no.

pineranch · 11-29-2010, 02:04 AM

Thanks for the input. That's what I thought and it does give me piece of mind. I keep my total weight well under the combined weight limit and head on down the road.
Mike

CamillaMichael · 11-29-2010, 03:47 AM

Quote:

quote:Originally posted by mlh

pineranch
The F350 has a greater pay load because, as you noticed it has heaver springs. Most of the time they have a lower axle ratio. The frame, all of the running gear, body, cab, etc etc are exactly the same. If you change the springs on a F250 to the F350 springs you will wind up with a F250 that is as capable of hauling or towing as a F350 SRW. Will it be a F350?, actually yes, legally no.

Actually, not completely accurate...I have ready access to data for the 2010 and 2011 models. According to that data, the front axels on the Ford HD trucks are 6,000 lbs for each model (250/350/450)(4x4). Now the numbers for the rear axel tell a different tale. For the 2010 models, the 4x4 rear axel on the 250 has a 6,100 lb rating while the 4x4 rear axel on the 350 has a rating of 7,050 lbs. For the 2011 models, the numbers increase slightly...the 250's rear axel is rated at 6,200 lbs and the 350's axel is rated at 7,280 lbs. The numbers, of course, for the DRW trucks are even higher. Also, the upgrades in the truck from the 250 to 350 allow for an increase in gvwr for the 250 of 10,000 lbs to a gvwr for the 350 of 11,500 lbs.

mlh · 11-29-2010, 09:11 AM

The rear ends of all F250 and F350 models both SRW and DRW 2008 - 2011 are identical. They are a Ford built 10.5 inch rear end. The only difference is the DRW has different hubs for mounting dual wheels. The springs give them different load ratings, not the rear end.

pineranch · 11-29-2010, 09:41 AM

Agree, just talked to my service manager and the helper spring is the diff between 700 to 900 lbs increased rating. My shock was the 2011 350 and 250 with all things being equal is $700. Hell for $700 I could be running around thumping my chest like the big guys.
Mike

CamillaMichael · 11-29-2010, 10:15 AM

Quote:

quote:Originally posted by mlh

The rear ends of all F250 and F350 models both SRW and DRW 2008 - 2011 are identical. They are a Ford built 10.5 inch rear end. The only difference is the DRW has different hubs for mounting dual wheels. The springs give them different load ratings, not the rear end.

Not sure what you mean by "rear end," but the axels are not the same...believe there is more to tow capacity than just one line item.

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