Pigeon toed ttb

Discussion in '6.9L IH & 7.3L IDI Diesels' started by 503sp01, Oct 13, 2017.

  1. 503sp01

    503sp01 Registered User

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    i have a 91 f250 with a ttb and a 4” lift and when I back up the tires go like /\ is there any way to fix it I don’t see a sas swap in my near future
     
  2. pelky350

    pelky350 Full Access Member

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    My friends truck did that, his was due to alignment, my bronco does the same thing but when driving straight the wheels stay straight. Sometimes is a sign of worm bushings or steering components/alignment. Pretty much all the ttb trucks I've seen do this
     
  3. Dieselcrawler

    Dieselcrawler i pooped today! Staff Member

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    Yes it is very common when backing up. Do they sit normal going forward? If so, send it.
     
  4. Mulochico

    Mulochico Supporting Member Supporting Member

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    With my 4" lift it did that until I did a full alignment with adjusters that had a significantly larger adjustment. A friend found the adjuster and we spent a long time leisurely doing the alignment to get it correct. It has a very small pigeon toe when backing up, but you really need to be picky (me) to notice it. An alignment like this is a lot more expensive and requires a tech who knows what they are doing to get it correct. We used his bosses alignment rack after hours so it was pro-bono. We each help each other as we can. :)
     
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  5. 503sp01

    503sp01 Registered User

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    I will check everything out it’s very bad backing up I have to move the wheel back and forth just to keep backing up
     
  6. Danielle

    Danielle I'm not allowed any more trucks!

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    Mine is still doing it a bit after all new front end components (tie rods, box, balls, radius bushings, I beam bushings) and an alignment. I was almost about to post this exaxt question haha

    Sent from my VS835 using Tapatalk
     
  7. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    I think they're built that way for some reason.
     
  8. Alwaysreadyrob

    Alwaysreadyrob IDI TURBO

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    Its because its a Ford not a Backwards ! Lol
    Whats a TBB ?
     
  9. mblaney

    mblaney Full Access Member

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    "TTB" = twin-traction beam.

    They do this because of toe. When you back up the wheels naturally want to pull away from your line of travel. This pulls any slack from worn steering compenents causing more toe, plus it flexes the front suspension like it was carrying a heavy load. Due to the articulation of the split axle (when loaded) the front wheels are no longer vertical (camber); when added to the toe angle the truck looks cross-eyed.

    The fix is to replace all wear parts to minimize the effect, swap a D60 solid axle, or I guess you can reverse the toe angle for that perfect look when backing up :bail
     
  10. oregon96psd

    oregon96psd Full Access Member

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    The real fix...
     
  11. ShadetreeV

    ShadetreeV Registered User

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    The camber change is an inherent property of the split axle style design. Swing axle VW's and vintage Mercedes are a good example of how this works . Good explanation by mblaney
     
  12. Macrobb

    Macrobb Full Access Member

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    Basically... replace worn bushings and such and ignore it. What matters is going /forward/ what the toe angle is.
    Going backward? Not really an issue.
     

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