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Upper Ball Joint fitting & torque MOOG K-778 vs OE
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fravizo
Posted 2018-03-11 4:21 PM (#559693)
Subject: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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Location: Stockholm Sweden
Anyone here please help me out?
The MOOG ball joint K-778 comes with only a big rubber boot and this will let stud and its cotter pin slot go deeper into the spindle ca 8mm

The manual says in the figure that the ball joint is sealed with two seal and a retainer and this keeps the cotter pin slot perfect in level with the castle nut

Anyone who has encountered this and solved it safely. Is it only just an adjustment of the camber bolts, but what about the torque of the stud
Thanks, Johan
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wizard
Posted 2018-03-11 4:59 PM (#559695 - in reply to #559693)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE



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I know that some ball joint instructions informs that a washer (normally supplied) must be mounted in certain applications, but 8mm seems somewhat too much, typically, those washers are like 1/8"
I have the MOOG K-778 ball joints as spares, but the ones mounted are NOS aftermarket ones, so I have never mounted any of the K-778's
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fravizo
Posted 2018-03-14 6:04 PM (#559896 - in reply to #559693)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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Hi, this ball joint as shown on the pic should be the problem solver and if anyone has one or two laying on the shelf I would happy to buy them
Johan



(Ball Joint with seals and retainer.jpg)



Attachments
----------------
Attachments Ball Joint with seals and retainer.jpg (140KB - 14 downloads)
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wizard
Posted 2018-03-15 2:38 AM (#559927 - in reply to #559693)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE



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Can you see the number on the box? Is it 712 or 272
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fravizo
Posted 2018-03-15 8:07 AM (#559930 - in reply to #559927)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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Sven, I can´t either figure out what it reads, pic from the web and that ball joint has been sold.

But maybe as 1960fury has mentioned in an another thread that the steering knuckle is worn-out
and also I´ll test to just drop the old ball joint into the steering knuckle and do same with the new k778
and measure the length of the studs down under
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fravizo
Posted 2018-03-20 3:51 PM (#560209 - in reply to #559693)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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Location: Stockholm Sweden
This makes quite a difference between the OE and a brand new MOOG K778. both tourqued accordingly to the manual.
Is this acceptable and secure.
BTW. I think one lesson I´ve learned is there´s no need to demount the ball joint from the contol arm when replacing the control arm bushings
unless the ball joint is shot



(BALL JOINT OE.jpg)



(BALL JOINT MOOG 778.jpg)



Attachments
----------------
Attachments BALL JOINT OE.jpg (96KB - 15 downloads)
Attachments BALL JOINT MOOG 778.jpg (137KB - 15 downloads)
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mikes2nd
Posted 2018-03-20 3:57 PM (#560211 - in reply to #559693)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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i only had to use a single washer on my 57 dodge.
I think were talking Chrysler/Desoto though here right?

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fravizo
Posted 2018-03-20 4:55 PM (#560213 - in reply to #560211)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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mikes2nd - 2018-03-20 9:57 PM

i only had to use a single washer on my 57 dodge.
I think were talking Chrysler/Desoto though here right?



Yes it´s my troublesome trials on my New Yorker ´61
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1960fury
Posted 2018-03-20 6:03 PM (#560214 - in reply to #559693)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE



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the large cars imp/126"wb chryslers used different balljoints than the smaller cars. iirc the upper ball joints for dodges/plymouth are moog #772, the bigger cars moog#778.
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fravizo
Posted 2018-03-21 10:47 AM (#560239 - in reply to #560214)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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1960fury - 2018-03-21 12:03 AM

the large cars imp/126"wb chryslers used different balljoints than the smaller cars. iirc the upper ball joints for dodges/plymouth are moog #772, the bigger cars moog#778.


I´ve talked to MOOG, and asked them about what numbers there are stamped on their upper ball joint K778 and they say:
- On the cover plate it is 39
- On bottom end of the tapered stud it is 790
The MOOG said that the tapered stud measures in inches 0.791 and 0.673

The stamped numbers 39 and 790 also shows on my installed K778, though my stud plunges deeper as shown in the above pic.
What do you, anyone, think. Is it safe to drive whith that small gap between the steering knuckle and the ball joint?

Thanks, Johan

Edited by fravizo 2018-03-21 12:41 PM
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fravizo
Posted 2018-03-22 1:40 PM (#560308 - in reply to #560239)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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Posts: 60
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Location: Stockholm Sweden
I´ve just bought this Upper Ball Joint Separator from Mancini Racing, hope it will fit the N.Y. ´61
http://www.manciniracing.com/upbajostre1.html
In idle mode at the moment waiting for that piece to arrive and hopefully get the BJ out and measure the
daimeter of the holes in the steering knuckle, especially the lower one. And also compare the OE with the K778
see if there´s a difference when just dropping them into the steering knuckle. I´ll let you know when it´s done.
Johan
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wizard
Posted 2018-03-22 3:36 PM (#560316 - in reply to #559693)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE



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That's the correct type of tool - I have made several versions to different cars.

Works both for upper and lower ball joint, just loosen one nut a Little, apply some force and the ball joint will pop out of seat. Tighten the nut with the fingers, loosen the other nut a Little and repeat the proceedure and the knuckle is free.
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fravizo
Posted 2018-03-22 5:16 PM (#560321 - in reply to #560316)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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Posts: 60
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Location: Stockholm Sweden
wizard - 2018-03-22 9:36 PM

That's the correct type of tool - I have made several versions to different cars.

Works both for upper and lower ball joint, just loosen one nut a Little, apply some force and the ball joint will pop out of seat. Tighten the nut with the fingers, loosen the other nut a Little and repeat the proceedure and the knuckle is free.


Good to hear and a sigh of relief, a step in the right direction so far as to get the proper tool.
Thanks, Johan
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fravizo
Posted 2018-04-27 6:25 PM (#562380 - in reply to #559693)
Subject: Re: Upper Ball Joint fitting & torque MOOG K-778 vs OE


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Posts: 60
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Location: Stockholm Sweden
Maybe obvious to you but anyway, from what I now learned, if you wanna replace the upper control arm bushings, and when your´re at it and thinking of replacing the upper ball joint as well, just loosen the stud nut and then check firmness of the ball joint stud after you have it lifted out of the spindle. I my case I unsrewed the ball joint and replaced it with MOOG K778, (should fit full size New Yorker) its stud went too deep as shown above, so I put back the oe one, in good firm condition, with a perfect fit. I used the Moogs´rubber boots to cover the ball joint.
Johan

Edited by fravizo 2018-04-27 6:29 PM
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