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Parts don't match - spindle & lower ball joint #2360813
08/27/17 09:34 PM
08/27/17 09:34 PM
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lostdog Offline OP
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I have a '73 barracuda that I am rebuilding the front suspension on

My disc brake spindle has what looks like 4 3/8" mounting hole spacing. The new lower ball joint has what looks like 4" mounting hole spacing. And the hole
Size is smaller in the ball joint.

What's going on here? Can someone tell me what lower ball joint I need? Of course, i have no idea what parts have been put on this thing over 45 years.

Robby

image.jpegimage.jpeg
Re: Parts don't match - spindle & lower ball joint [Re: lostdog] #2360818
08/27/17 09:41 PM
08/27/17 09:41 PM
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amxautox Offline
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the top one has about 4 1/4" spacing - but your tape measure end isn't really lining up to anything around the hole so it's hard to tell. measure from one side of a hole, and then the same side of the other hole - like in the second picture.


the bottom one has 3 5/8th" or 3 11/16th"spacing.


Look at the old ball joint, and the mount, and see if there are a part numbers on them.


Tom

"Everyone should believe in something; I believe I'll go fishing."

-Henry David Thoreau

Men and fish are alike. They both get into trouble when they open their mouths

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Re: Parts don't match - spindle & lower ball joint [Re: amxautox] #2360832
08/27/17 09:58 PM
08/27/17 09:58 PM
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lostdog Offline OP
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Originally Posted By amxautox
the top one has about 4 1/4" spacing - but your tape measure end isn't really lining up to anything around the hole so it's hard to tell. measure from one side of a hole, and then the same side of the other hole - like in the second picture.


the bottom one has 3 5/8th" or 3 11/16th"spacing.


Look at the old ball joint, and the mount, and see if there are a part numbers on them.


Unfortunately, i do not have the ball joint that was on there.
I just remeasured both at hole centers.
Spindle center-to-center hole spacing is 4 3/8"
Lower ball joint center-to-center hole spacing is actually 3 3/4"

Re: Parts don't match - spindle & lower ball joint [Re: lostdog] #2360858
08/27/17 10:51 PM
08/27/17 10:51 PM
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sounds like you got a 9" drum LBJ for an A body Cuda.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
Re: Parts don't match - spindle & lower ball joint [Re: Supercuda] #2360877
08/27/17 11:18 PM
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Originally Posted By Supercuda
sounds like you got a 9" drum LBJ for an A body Cuda.


And that was my first thought as to what has happened but I don't know enough to know.

Re: Parts don't match - spindle & lower ball joint [Re: lostdog] #2361086
08/28/17 12:04 PM
08/28/17 12:04 PM
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krautrock Offline
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is there a part number on the spindle?
looks like it might be the post 1973 a-body disc brake spindle. the part numbers are 3402626 and 3402627, on the upright of the spindle.
if that's the case you just need moog k781 and k783 lower ball joints.

Re: Parts don't match - spindle & lower ball joint [Re: lostdog] #2361114
08/28/17 12:55 PM
08/28/17 12:55 PM
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You definitely have the early A body drum ball joint.

What's the part number of the LBJ?

Take it back and get the proper ones.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
Re: Parts don't match - spindle & lower ball joint [Re: krautrock] #2361116
08/28/17 12:57 PM
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Originally Posted By krautrock
is there a part number on the spindle?
looks like it might be the post 1973 a-body disc brake spindle. the part numbers are 3402626 and 3402627, on the upright of the spindle.
if that's the case you just need moog k781 and k783 lower ball joints.


Ok - that's a big help. I'll look for the numbers
when I get home.

Also, I got all these pieces in a kit including the idler arm. I'm concerned now that I may have the wrong idler.

Thank you !

Last edited by lostdog; 08/28/17 12:59 PM.
Re: Parts don't match - spindle & lower ball joint [Re: Supercuda] #2361118
08/28/17 12:58 PM
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Originally Posted By Supercuda
You definitely have the early A body drum ball joint.

What's the part number of the LBJ?

Take it back and get the proper ones.


There are no part numbers on the LBJ

Re: Parts don't match - spindle & lower ball joint [Re: lostdog] #2361196
08/28/17 04:01 PM
08/28/17 04:01 PM
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Mopar Mitch Offline
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Where did you get the kit from? Seems they mis-packaged or sold you the incorrect parts.


Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
Re: Parts don't match - spindle & lower ball joint [Re: Mopar Mitch] #2361221
08/28/17 04:58 PM
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Originally Posted By Mopar Mitch
Where did you get the kit from? Seems they mis-packaged or sold you the incorrect parts.



It was an ebay item. I should have known better ! As a matter of fact, I do know better but I did it anyway.

Re: Parts don't match - spindle & lower ball joint [Re: krautrock] #2361366
08/28/17 09:21 PM
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Originally Posted By krautrock
is there a part number on the spindle?
looks like it might be the post 1973 a-body disc brake spindle. the part numbers are 3402626 and 3402627, on the upright of the spindle.
if that's the case you just need moog k781 and k783 lower ball joints.



I've looked everywhere on the spindles and all
I can find is a "32" cast into one and a "31" cast into the other.
Does that denote something ?

Re: Parts don't match - spindle & lower ball joint [Re: lostdog] #2361409
08/28/17 10:44 PM
08/28/17 10:44 PM
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krautrock Offline
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Originally Posted By lostdog
Originally Posted By krautrock
is there a part number on the spindle?
looks like it might be the post 1973 a-body disc brake spindle. the part numbers are 3402626 and 3402627, on the upright of the spindle.
if that's the case you just need moog k781 and k783 lower ball joints.



I've looked everywhere on the spindles and all
I can find is a "32" cast into one and a "31" cast into the other.
Does that denote something ?


i'm not sure about that one.

see the pic on this page with measurements. that is the A-body spindle 73-76.
http://www.allpar.com/history/mopar/brakes/disc-main.html

Re: Parts don't match - spindle & lower ball joint [Re: krautrock] #2361449
08/28/17 11:29 PM
08/28/17 11:29 PM
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lostdog Offline OP
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Originally Posted By krautrock
Originally Posted By lostdog
Originally Posted By krautrock
is there a part number on the spindle?
looks like it might be the post 1973 a-body disc brake spindle. the part numbers are 3402626 and 3402627, on the upright of the spindle.
if that's the case you just need moog k781 and k783 lower ball joints.



I've looked everywhere on the spindles and all
I can find is a "32" cast into one and a "31" cast into the other.
Does that denote something ?


i'm not sure about that one.

see the pic on this page with measurements. that is the A-body spindle 73-76.
http://www.allpar.com/history/mopar/brakes/disc-main.html


It looks like I DO have the later A-body pieces based on the clues that there are no casting numbers, the measurements of the ones I have match the pieces in the article and I have 11" rotors. I'll try the moog k781 and 783 and hopefully that will do it.
It looks like someone knew what they were doing and thankfully they did because I do not !
Thank you!







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