Got a alignment today, now have questions - Diesel Forum - TheDieselStop.com
7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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post #1 of 19 (permalink) Old 09-28-2018, 07:47 PM Thread Starter
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Got a alignment today, now have questions

My tires have been wearing on the outside so i decided i should do a alignment on it before my brand new tires become useless, so i go. The guy puts it on the lift and tells me that the nut for the gear box is loose and the long tie rod that goes from the pass side to the gear box is bad, but when he showed me it didnt look to bad so i had him tighten the nut and after that do the alignment. So he comes back after doing 90% of it and tells me that i have to replace the sleeves for the ball joints but wouldnt tell me which ones to get. And tells me oh yea by the way your rear end is bent. I said all that to ask this, in the picture is the before and after of my alignment can someone tell me how likely it is.
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90 f350 2wd 7.3idi non T 5speed
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post #2 of 19 (permalink) Old 09-28-2018, 10:34 PM
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It looks like someone might have hit something with the RHR wheel(s) and maybe bent that spindle, but I doubt the whole axle housing is bent.

These are the camber cams I use, but your axle almost certainly takes a different PN:


(phone app link)


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post #3 of 19 (permalink) Old 09-28-2018, 11:20 PM Thread Starter
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would a shock being loose cause this as well?
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post #4 of 19 (permalink) Old 09-29-2018, 08:40 AM
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Originally Posted by DevilDog6154 View Post
would a shock being loose cause this as well?
No, shocks have nothing to do with alignment or steering. And unless you've had a front axle, front suspension type of impact collision, 99% of the time all these old Ford pickups need is the toe-in set. Of course that's providing tie rods and all aren't worn excessively.

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post #5 of 19 (permalink) Old 09-29-2018, 02:38 PM
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would a shock being loose cause this as well?
No. A bad shock can ALLOW other problems to exhibit themselves, but it doesn't actually CAUSE any wear or damage. The shocks only damp the action of the springs. Read this caption & follow the relevant links in it:


(phone app link)


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post #6 of 19 (permalink) Old 09-30-2018, 01:15 AM Thread Starter
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i meant the shock being loose on the rear would it make him think it is bent? or maybe the bearings are bad? as long as i've owned it it has not been in any accidents.
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post #7 of 19 (permalink) Old 09-30-2018, 12:42 PM
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What does "loose on the rear" mean? The bolt is loose holding one of the shocks to the rear axle? Or are you talking about the nut holding it to the frame? Or are the bushings gone out of the shock eye(s)? Post pics, or describe it more-thoroughly.

No, nothing about the shocks would make any pro think the rear axle is bent.


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post #8 of 19 (permalink) Old 09-30-2018, 08:52 PM
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Then why pin the poor guy down having him answer this which has nothing to do with his question??? He's trying to get advice for a problem, not here for an interrogation.




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What does "loose on the rear" mean? The bolt is loose holding one of the shocks to the rear axle? Or are you talking about the nut holding it to the frame? Or are the bushings gone out of the shock eye(s)? Post pics, or describe it more-thoroughly

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post #9 of 19 (permalink) Old 10-04-2018, 08:03 AM Thread Starter
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One of the bolts that hold the shock to the axle is loose. I should have went into more detail.

90 f350 2wd 7.3idi non T 5speed
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post #10 of 19 (permalink) Old 10-04-2018, 08:04 AM Thread Starter
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I just wanted to know if i need to worry about a bent axle or if it was just some bearings that need changed.

90 f350 2wd 7.3idi non T 5speed
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post #11 of 19 (permalink) Old 10-04-2018, 10:03 AM
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The pictures on the alignment report are misleading. That is not how your suspension looks. The SuperDuty trucks use a full floating axle. That means the rear hubs are riding on bearings that are on a spindle on your axle frame. The shocks do not contribute to the axle position going down the road in any way, shape, or form. The axle position is set by the leaf spring attachment to the frame and the axle attachment to the leaf springs.

If you haven't done so, check the bearings. They are a wear item and are old enough to need replacing. There are bushings in the leaf spring eyelets that can wear over time. I've replaced a few of them in vehicles going back to pre-50s models and even then they aren't in terrible shape. I doubt you have worn yours out.

I don't see anything in your alignment report that causes alarm. They got the front end lined up good. The rear is fine. Be happy.
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post #12 of 19 (permalink) Old 10-04-2018, 10:08 AM
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Good points, RT.

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post #13 of 19 (permalink) Old 10-04-2018, 10:59 AM
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Quote:
Originally Posted by DevilDog6154 View Post
One of the bolts that hold the shock to the axle is loose.
That's very minor. Did the guy tighten it for you?
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I just wanted to know if i need to worry about a bent axle or if it was just some bearings that need changed.
Nothing you've posted suggests either of those, other than the guy telling you something was bent.


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post #14 of 19 (permalink) Old 10-04-2018, 11:24 PM Thread Starter
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thank you very much for the feed back. no he did not tighten it. when i looked at the alignment i thought the same thing that the numbers was to far off from each other. i didn't be leave him when he said it was bent i figured if anything the bearings need to be changed but i just wanted to get some other thoughts on it. that is good to know how the axle works thank you. i thought the shock would have some input on that but i learned something new.
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post #15 of 19 (permalink) Old 10-05-2018, 08:56 AM
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The shock only damps the spring - it doesn't hold the axle in-position. These show how the axle is put together:


(phone app link)



(phone app link)


I thought the spindle (41 or 43 in the first diagram) was bolted on, but it looks like it's part of the axle housing (24). So if the spindle is bent, he was right - the axle is bent.


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