ConcoursMustang Forums
Restoring - General discussions that span across many different groups of years and models => Suspension => Topic started by: chockostang on December 19, 2020, 07:30:00 PM
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Has anyone seen a C8AA 3355 B Idler arm come off a 67-70 Mustang with Power Steering.
Yes, exactly in every detail/measure as the C7ZA 3355 B.
Very confused here???
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I found a C7ZA- 3355-B idler arm the upper shaft lock nut was missing. Does anyone have a source for them? It is a 9/16 -18 thread.
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Give me a call.
Dan
217 882 2083
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I found a C7ZA- 3355-B idler arm the upper shaft lock nut was missing. Does anyone have a source for them? It is a 9/16 -18 thread.
Did you look up the Ford part number for the nut?
Jim
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Did you look up the Ford part number for the nut?
Jim
The assembly manual did not have a part number for that nut, it did however did have a number for the lower nut. I think because the idler arm was a assembly it's parts were not broken down into Ford part numbers.
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There is no number for the Acorn nut guys.
Got several, if someone needs one, Just call!
Dan
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Thanks for your help Dan. I meant to say I have never have seen a C8AA 3355 B arm. Would the AA be from a big Ford?
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There is no number for the Acorn nut guys.
Got several, if someone needs one, Just call!
Dan
It's listed in Ford Car Parts (aka MPC), and it's a "castle" nut. The accompanying washer, 379297-S, is not serviced.
Jim
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It's listed in Ford Car Parts (aka MPC), and it's a "castle" nut. The accompanying washer, 379297-S, is not serviced.
Jim
Jim that is not the nut I need. I said that one is listed. It is the one that is dome shaped on the upper bushing. It is not listed.
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The end of the stud is typically crimped so as to lock the nut in place .You have to grind away the crimp or risk stripping the nut as you try unthreading it.Sometimes it will come off without damage to the nut threads and sometimes not.
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It may be as shown in the illustration below, 377330-S, depending on the height, 0.359 inch. That same nut may be used on C4 transmissions for the manual control valve lever to it's shaft, which is referenced in the 75 Ford Car Parts (aka MPC) in Section A70.4 page 13.
Jim
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Yes the A is big car. Puzzling aspect is I've never seen one, then it came off a 68 Mustang, it is in every way exactly same as the C7ZA 3355 B.
Zero reference in googling, searching for this.
Again, has anyone have info on this idler?
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ruppstang
Carol put 2 Acorns in mail today.
As Bob stated, yes the threads do get screwed up.
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I have been wondering about the differences between the manual and power steering arms. I do not have a original manual to compare.
I know the shaft for a manual has a oval hole in it between the mounting holes where the power one has none. Was the hole for identification purposes?
I know there is a difference in the lower bushings
Is the arm the same for PS and Manual? If so could you use a manual arm for PS by changing the lower bushing?
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The idler arms are all C7ZA 3355 B cast in the rail of the idler. Everyone comes out the same. The difference is the machining of the centerlink end hole in idler.
The manual hole is a few thousands larger than the PS.
A power steering bushing will fall in the hole of a manual idler.
Can a manual idler be used for PS. Yes, create a shim that is the correct thickness to compensate the slop, press it in.
As far as the oblong hole---Who knows why Ford made all the changes back then, Remember it was the 60's where we had free love, free thinking, and LSD. Maybe some of the Ford engineers experimented????
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Here's an interesting and, not so unusual, contradictory listing in the 75 edition of Ford Car Parts (aka MPC), Section 30 page 22 (available in the Forum's Library):
The service stock number for 67 thru 70 manual steering is C7ZZ-3350-B (power is C7ZZ-3350-B), and for 71 on is D3OZ-3355-A (for M/S and P/S). At the bottom of the page is a note that pertains to 69 on:
"Attaching parts serviced in assy. only due to swagged bracket end".
That note implies the swagged/peened end was used from 1969 on and does not apply to 1967 and 1968, but the service replacement covers from 1967 thru 70.
Like I said, "contradictory".
Jim
Note: In every query regarding hardware, I research to add or correct the Mustang Hardware Spreadsheets. My original entries were based on the Mustang Assembly Manuals. If the hardware item was not listed in those manuals I "defaulted" to Ford Car Parts, only when the hardware item was questioned. As the are over 5500 pages to review, I declined to spend additional research time except for situations like this.
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Odd note given assemblyline idlers from 67 and 68 are "swagged /peened" the same way as 69.
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Odd note given assemblyline idlers from 67 and 68 are "swagged /peened" the same way as 69.
Like I said, "contradictory".
Jim
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Yes, all were compressed threads to achieve the no loosing of the Acorn nut..
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Yes, all were compressed threads to achieve the no loosing of the Acorn nut..
It is not an "Acorn Nut". It is closer to a "Cone Nut". By definition, an Acorn nut has a closed end and no threads are exposed. As such, without exposed threads, you cannot deform, peen or swag the threads. Do not confuse the children with the misnamed nut.
Jim
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Learned as a acorn nut 40 years ago, it will stay that way in my vocabulary. You call it whatever. No problem.
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It is not an "Acorn Nut". It is closer to a "Cone Nut". By definition, an Acorn nut has a closed end and no threads are exposed. As such, without exposed threads, you cannot deform, peen or swag the threads. Do not confuse the children with the misnamed nut.
Jim
You calling me a child, or a misnamed nut? Hmmmm? Deformed with a swagger, I can accept...
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Did not get the child thing either--Just let it go????
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Jim has provided a picture of a nut (his 2nd image).
Is this what we should see? Absolutely nowhere in this thread has anyone showed an original assemblyline image of the nut in discussion (only in a drawing).
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Richard, Marty posted a picture of one in reply #8. I pulled that off a 69 Mustang 390 manual steering junkyard car. Slightly pitted ;)
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I have been wondering about the differences between the manual and power steering arms. I do not have a original manual to compare.
I know the shaft for a manual has a oval hole in it between the mounting holes where the power one has none. Was the hole for identification purposes?
I know there is a difference in the lower bushings
Is the arm the same for PS and Manual? If so could you use a manual arm for PS by changing the lower bushing?
You could adapt the manual arm by making a sleeve as Chock says, but the brackets or shafts are different. The power bracket is formed to move the arm about 1/2" lower than the manual, so you would have to use the power steering bracket.