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New '19 f250 moves around while towing

 
  #76  
Old 03-12-2019, 10:40 AM
Wotf8
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Originally Posted by Mark250 View Post
Wotf8, a little off subject but how do you like the 6.7 compared to what I assume was a Cummins in your other truck?
Simple answer, the powersroke is awesome. Has more power, pulls very strong, doesn't over rev or anything(I was concerned about that). The cummins does have alittle more torque right at the very bottom end, low engine rpm, but you actually only use that when not towing. It was happy to drive around at 1000 or 1100 rpm when you were not going very fast (50-55 mph), but when towing in tow hual mode it made the engine run at a higher rpm (downshifting the transmission) so you actually don't run much different rpm to the powerstroke while towing. Fuel economy seems to be identical. Very happy with the Ford engine.
 
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Old 03-13-2019, 07:50 AM
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I'm glad you like the engine. I have had mine 2 months and love it. I had a 7.3 for 14 years but the 6.7 is so much better.
 
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Old 03-13-2019, 08:20 AM
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OP, I have been following along in your thread, and have not noticed; but have you had your alignment checked? Sometimes, a vehicle can be “in spec” but still handle like crap, especially when towing. Maybe just tweaking the front end a bit might help with your situation.
Good luck figuring this out.
 
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Old 03-17-2019, 05:36 PM
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So, made in back home, 3000 miles towing with it. Of all the unbelievable things, lowering the tire psi on these michelin's helped. Running alittle under 60 upfront and just over 60 on the back. I am still going to change away from these tires.
 
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Old 03-18-2019, 01:13 PM
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I guess I didn't realize you had the Michelins. While Michelins are typically industry standard the ones that come OE on these trucks I have never been impressed with. By comparison I love my OE Wranglers. BTW: I am shocked at this revelation as every previous truck came with Wranglers as OE tires and I hated them all.

After much testing I have settled on 58 psi F/R as unloaded pressures and 60/60 F/R when towing. (I should note that I bumper pull a 9K lbs trailer) These pressures result in the best tire wear and stability.
 
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Old 03-18-2019, 01:31 PM
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Looks like we ended up at pretty much the same tire pressures. Also, once these tires wear down/age, (tread becomes stiffer) they likely will drive better.
 
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Old 03-18-2019, 03:15 PM
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Originally Posted by Wotf8 View Post
Looks like we ended up at pretty much the same tire pressures. Also, once these tires wear down/age, (tread becomes stiffer) they likely will drive better.
Perhaps. My neighbor has what is basically an identical truck to mine except his is a 6.2 and it has the Michelins on it. I think the OE Michelins are not as good unloaded. The small tread blocks seem to squirm too much. I have also seen these chunk quite a bit.

For reference: I am a vehicle dynamics engineer by trade and have been driving racing cars for 30+ years. In that time I have done more tire tests that I could count.
 
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Old 03-18-2019, 03:34 PM
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Well a stiff side wall and soft tread would give a squirming feel for sure. I know on bfgoodrich ko2 have a less tread depth in a load range E then in a D. Likely for that reason.
 
  #84  
Old 03-19-2019, 08:24 PM
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Originally Posted by Wotf8 View Post
It is a curt hitch on rails. It "meanders", best I can describe it. Have to make small corrections to keep it in a lane. Which is normal right, but I am comparing it to the ram I had and it drove "straighter", with no trailer they both drive fine, the Ford does have a smoother ride overall. Also, like I mentioned above, when someone is passing you the air pressure change around the truck makes you have to correct the steering enough, like say driving over uneven pavement with extra wide tires, if you get what I am saying. Just more than I am use too. I really think it is in the tires. That is what makes the most sense to me.
Who did the rail install? Is there play in the hitch? Pin ahead of the axle? Why not the factory puck system?
 
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Old 03-20-2019, 10:32 PM
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The hitch is all installed correctly, ahead of the axle about 1.5". Dealer didn't want to install the factory setup, said it was expensive to do. Also I already had the curt hitch, just needed the rails.
 

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