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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

new tires now handling problems

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Old Jul 23, 2009 | 05:06 AM
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new tires now handling problems

I just got new back tires on my e350 with dual wheels. now when I'm driving on the highway, the truck acts like it doesn't want to go down the road straight. It wants to sway back and forth. Are the wheels installed incorrectly? Thanks for any help.
 
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Old Jul 23, 2009 | 08:22 AM
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Do they have the proper air press? Don't rely on the installer for this.
 
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Old Jul 23, 2009 | 07:12 PM
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the tires came from the shop at 80 psi. the sticker on the door post says to have 60 psi, tomorrow i'll set at 60 and see how that works. Thank you for your reply.
 
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Old Jul 23, 2009 | 07:27 PM
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80 psi unloaded will cause your back end to be all over the place.
 
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Old Jul 23, 2009 | 08:22 PM
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I did have approx. 1,000 lbs. on board. Tomorrow I'll adjust to 60 psi and see how that works. Thank you for your reply.
 
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Old Jul 23, 2009 | 08:55 PM
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Did they replace the tires with the same or correct load range tire? There have been threads on this before where members have gone in for tires and the installer replaced them with different load range than the front or rear. You might check to see due to the fact that the "D" and "E" range tires have different sidewall flex characteristics.
 
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Old Jul 23, 2009 | 09:29 PM
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I did check the load range. They are E, same as the originals. Thanks.
 
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Old Jul 23, 2009 | 09:31 PM
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Well, that's good. I would suspect the PSI then.
 
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Old Jul 23, 2009 | 10:09 PM
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some new tires just do that. I had a new set on, all over the road. i think its just the lugs on the tires that give a bit. went away after couple weeks.
 
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