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Pictures - 2017 F250 vs F350 Rear Axle

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Pictures - 2017 F250 vs F350 Rear Axle

  #1  
Old 11-03-2016, 09:25 PM
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Pictures - 2017 F250 vs F350 Rear Axle

11/6/16

Summary of Thread Regarding Rear Axles
1. ALL diesel SRW 350s get the M275. There is not an HD 350 package...only gas vs. diesel.
2. All Gas 350 SRW get the Sterling.
3. All 250 Gas and 250 Diesel (std) get the Sterling.
4. All 250 HD Tow package(which is diesel ONLY)...get the M275

11/6/16

Summary of Thread Regarding Spring Rates

2017_F-250_F-350_F-450_SD_Pickups_-_Specs (1).pdf
See Page 31/32 and look at "Max Std. Spring" "Front". I think this would be the spring for the F250 HD Tow and shows 5200.
See page 36. Same column/truck. I see 5600. I think this would be the spring for the F350 w/ 18" rims.
See page 37. Same column/truck. I see 5200. I think this would be the spring for the F350 w/ 20" rims.


Original Post 11/3/16:

I've been asking a lot of questions and finally drove to a dealership to snap pictures. It is clear that the F350 has a larger rear end than the F250.

Next question:
1. Does F250 with max tow get the same rear axle as an f350?
2. If it does, does the "max front springs" ride stiffer or softer than a standard F350?

My goal is to get the truck combo that has the larger rear axle but the best ride.

Pictures:
F250 Top
F350 Bottom
(sway bar is the F250 w/ camper package)

Name:  F250.jpg
Views: 11568
Size:  2.10 MB

Name:  F350.jpg
Views: 13429
Size:  1.85 MB
 
  #2  
Old 11-03-2016, 09:27 PM
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Yes, the HD 250 gets the same M275 axle as the SRW 350. The front springs should be the same as the 350. Max is still 5990 with the plow prep.
 
  #3  
Old 11-03-2016, 09:34 PM
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Originally Posted by Karl4Cat View Post
Yes, the HD 250 gets the same M275 axle as the SRW 350. The front springs should be the same as the 350. Max is still 5990 with the plow prep.
So do we know spring rates of HD250 vs F350 definitively? Really then, the only difference (if spring rates are the same), is the couple extra leafs in the rear of the 350? 5 vs 3 leafs? other than that same truck?
 
  #4  
Old 11-03-2016, 09:38 PM
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The spring rates are not the same in the rear. It's not just the extra leaf.

 
  #5  
Old 11-03-2016, 09:41 PM
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Originally Posted by ruphianh View Post
So do we know spring rates of HD250 vs F350 definitively? Really then, the only difference (if spring rates are the same), is the couple extra leafs in the rear of the 350? 5 vs 3 leafs? other than that same truck?
There are no front spring differences between the F250 and the F350. The front spring differences on both trucks are driven by selected options. Highest rate is snow plow prep. 5,990 lbs on 2017s; 6,000 lbs on 2005-2016s.
 
  #6  
Old 11-03-2016, 09:48 PM
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Originally Posted by skanj0 View Post
There are no front spring differences between the F250 and the F350. The front spring differences on both trucks are driven by selected options. Highest rate is snow plow prep. 5,990 lbs on 2017s; 6,000 lbs on 2005-2016s.
So, to get the M275, an F350 would have softer front springs, stiffer rear springs than an HD250.

Would it be safe to say that the F350 would ride better in the cab than an HD tow 250 since the fronts are softer?

End goal is the best riding variant of F250 or F350 as long as I get the M275 rear.
 
  #7  
Old 11-03-2016, 09:49 PM
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Originally Posted by Karl4Cat View Post
The spring rates are not the same in the rear. It's not just the extra leaf.


Do you have access to the front spring rate chart?
 
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Old 11-03-2016, 09:49 PM
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I doubt you will notice a ride difference between any configuration. As to the front rates, they will be the same between the 250 and srw 350. Base with a 6.7 is 5200#. HD front suspension pkg. or camper package nets you 5600#. Plow prep gets 5990#. This the same whether the 250 is HD or standard.
 
  #9  
Old 11-03-2016, 10:16 PM
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Originally Posted by Karl4Cat View Post
I doubt you will notice a ride difference between any configuration. As to the front rates, they will be the same between the 250 and srw 350. Base with a 6.7 is 5200#. HD front suspension pkg. or camper package nets you 5600#. Plow prep gets 5990#. This the same whether the 250 is HD or standard.
I'm sorry I think I've gotten this incorrect in my wording. The high capacity trailer F250 Vs F350 is what I'm trying to say.

High capacity trailer for F250 states "Max Front Springs" and upgraded rear axle

Does that mean that the F250 High Cap trailer front springs are stiffer than the F350?
 
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Old 11-03-2016, 10:23 PM
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Originally Posted by ruphianh View Post
I'm sorry I think I've gotten this incorrect in my wording. The high capacity trailer F250 Vs F350 is what I'm trying to say.

High capacity trailer for F250 states "Max Front Springs" and upgraded rear axle

Does that mean that the F250 High Cap trailer front springs are stiffer than the F350?
Stiffer than regular F350 coils? Perhaps...But why not just order the F350 so you get the M275, the 11,500 lb GVWR, the higher capacity leaf springs and RAWR, and then add the camper package so you get 5,600 LB front coils and a rear sway bar, or add the snow plow prep package so you get 5,990 lb front coils?
 
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Old 11-03-2016, 10:30 PM
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Originally Posted by skanj0 View Post
Stiffer than regular F350 coils? Perhaps...But why not just order the F350 so you get the M275, the 11,500 lb GVWR, the higher capacity leaf springs and RAWR, and then add the camper package so you get 5,600 LB front coils and a rear sway bar, or add the snow plow prep package so you get 5,990 lb front coils?

The end goal is to get the smoothest riding Super Duty with the M275 rear.

If I find that the rear is too soft, I'd buy bags.

I really appreciate everyone chiming in by the way.
 
  #12  
Old 11-03-2016, 10:36 PM
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I forgot the HD 250 gets max front springs. It's silly actually since it's rated lower than a SRW 350 with the base front springs but anyways. Yes, a SRW 350 should technically ride better than an HD 250 as it will have 5200# front springs. However, most can't tell the difference between between any of the SRW trucks ride wise. I'd take a test drive in all and not make a decision based on specs. You might be surprised.
 
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Old 11-03-2016, 10:39 PM
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I have a HD Tow Pkg Platinum F250. I do not have the camper or plow packages. Here are my stickers(technically they are from my dad's Ruby..but the two truck are identical and stickies are the same. I seriously doubt my 250 rides any smoother or rougher then any combo 350 SRW. It definitely rides smoother then my 2011 KR 250...but I can't compare yet until I drive a new 2017 350 SRW.
 
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Old 11-03-2016, 10:40 PM
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OK, so I'm confused. I guess the HD 250 doesn't get the max front springs...LOL. I thought I was wrong but that was inaccurate...LOL...
 
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Old 11-03-2016, 10:43 PM
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Originally Posted by Karl4Cat View Post
I forgot the HD 250 gets max front springs. It's silly actually since it's rated lower than a SRW 350 with the base front springs but anyways. Yes, a SRW 350 should technically ride better than an HD 250 as it will have 5200# front springs. However, most can't tell the difference between between any of the SRW trucks ride wise. I'd take a test drive in all and not make a decision based on specs. You might be surprised.
Great points. I'm with you, technically the 350 should ride better but I will now drive both and see what works better. I really appreciate your input.
 

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