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Old 11-21-2018, 06:12 PM   #1
Join Date: Oct 2018
Posts: 45
Unstable steering E350

Hi all. I have a 2011 E350 EB with 24k miles. It wants to wander all over the place and I feel like I’m always chasing it. Like I have brand new mud tires on it. It gets real bad when I get a specific distance behind a semi truck. It wags all over the place. It’s like when you roll a rear window down and you hear the womp womp womp from the wind. The van literally goes side by side in that pattern. If a semi truck comes up on me the back end feels like it breaks loose. It’s almost like I’m towing a trailer with no sway control.

I have been told that these need 5+ degrees of caster. I read to get the Ingalls 59400 bushings but they don’t look like they are available anymore. Any suggestions?

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Old 11-21-2018, 06:36 PM   #2
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Buffeting from following a semi and dealing with the pressure wave coming off of the front of one are always noticeable. But, it sounds like you have something else going on. Is it a 4x4? If so what kind? How are you loaded?

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Old 11-21-2018, 06:55 PM   #3
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Hi. It’s not a 4x4. Stock E350 15 passenger van. Not loaded with anything. It has 23k miles on it so all suspension stuff should be tight. 10 ply tires aired to 55/75. Ironton tires.
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Old 11-21-2018, 07:43 PM   #4
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I would take it to a good alignment shop and ask them to max out the caster and check the other specs and even ball joint play.
2005 E350 Chateau - V10 - Agile Offroad 4x4
2012 CTS-V Wagon - For the baby...
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Old 11-21-2018, 07:47 PM   #5
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Ok. Correct me if I am wrong but I read these come with fixed caster bushings that are non adjustable and that was why I needed the Ingalls one?
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Old 11-21-2018, 09:10 PM   #6
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A few other things to add to the list to check:
Rear axle U bolts
Lug nuts for tightness
Tire pressure (with a different tire pressure gauge than the one you used last)
Pitman arm nut
1995 E350 7.3 Diesel, 4x4 high roof camper, UJOR 4" lift
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Old 11-21-2018, 09:25 PM   #7
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Mine was the same. I got the front end done and it was an incredible difference. I have a 4x4 quigley and it was night day with the handling.
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Old 11-21-2018, 09:41 PM   #8
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Make sure they check the toe. I've had two E-series vans now that had their road manners greatly improved by a toe adjustment. Some alignment books give a really wide range that allows for toe-out, but in my experience there has to be a small amount of toe-in for them to track properly.
1990 E-250 Sportsmobile w/ penthouse top, converted when new by SMB Texas.
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Old 11-22-2018, 06:00 AM   #9
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This thread may have alternative Moog parts compatible with your van. Please note, tapatalk posted whole note, I meant to share link. Nonetheless, part links below.

Threads found on caster adjustment on this forum

This one talks about getting shofter arms

This one talks about getting caster really high (6-7). Very informative read, although the poster has high lift (6")

Also, this is a very long but worthwhile read (on another forum). The thread is mostly about steering stabilizer (adapted off an E450), but it talks about increasing caster to 5% for maximum comfort (e.g. post #508 and beyond)

post #517: Alignment bushings that might be needed to help with increasing caster: NAPA 158986 or Moog 8986 or Ingalls 594s

post #525: caster does not affect tire wear. Only camber and toe
Having too little positive caster will manifest itself as "loose steering" and "wandering" at highway speeds.

Ford ships the E series with +3 to +4 degrees of caster. You want to add 2 degrees to have +5 to +6 degrees. Google "E350 Handling" or "E350 Caster" for lots of info.
Estimating caster w/o going to the shop

At this point I am somewhat "sold" on the caster idea, provided all other parts are in good shape.

Other link

Couldn't find on Ingalls, but found recommended Moog K8986 parts on amazon. Ordered them and will bring them to alignment shop. Can always return if not needed.
2004 E350 XLT V10 15pas Quigley 3.73
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Old 11-22-2018, 06:26 AM   #10
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Ok. Thank you. Iím addition I already have the rear seat bar added too. I had a 12 passenger same year and it was never this bad. I didnít know if it was because it was a EB

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