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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

how many balljoints

  • Thread starter Thread starter lilblueskeeter
  • Start date Start date Feb 19, 2009
L

lilblueskeeter

New Member
Mar 11, 2006
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Feb 19, 2009
#1
  • Feb 19, 2009
  • #1
I was just wondering if there was a limit to how many sets of balljoints you could install in one set of control arms? Could you safely install 2 sets of aftermarket balljoints in one set of control arms or would there be a fear of them not fitting in them tight enough?

Thanks Danny
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,210
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Massachusetts
Feb 19, 2009
#2
  • Feb 19, 2009
  • #2
I've heard that pressing out the original BJ's does in fact enlarge the hole slightly.

I actually just ended up buying a set of Ford Racing A-arms and got new ones anyway.
 
L

lilblueskeeter

New Member
Mar 11, 2006
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Feb 22, 2009
#3
  • Feb 22, 2009
  • #3
anybody have any ideas cuz this is the second set ive installed since removing the stock ones and it was 10 times easier to press these in than it was the first set, which makes me nervous about driving it and not knowing if the balljoints gonna stay or just fall out the bottom of the control arm. any info as soon as possible would be greatly appreciated. Thanks Danny
 

skunk21

Active Member
May 22, 2007
1,203
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Taxachusetts
Feb 22, 2009
#4
  • Feb 22, 2009
  • #4
The fact that you had to "PRESS" them in gives me the indication they should stay in. Like Mike stated the hole does stretch some when pressing them out, and it doesn't sound like you beat them out, making the opening shape worse. The aftermarket joints might not have as tight a tolerence like the factory ones. I would say w/o physically being there when you changed them you should be okay.

I also did the upgraded a-arms, great mod and they have better balljoints. Might be something for the future.
 
L

lilblueskeeter

New Member
Mar 11, 2006
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Feb 22, 2009
#5
  • Feb 22, 2009
  • #5
i would have gone with the new control arms if it wasnt for the fact that they cost over 300 bucks which i didnt have. thanks for the info
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,210
17,894
224
Massachusetts
Feb 22, 2009
#6
  • Feb 22, 2009
  • #6
The price has gone through the roof. These arms used to be $160!
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
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129
Feb 22, 2009
#7
  • Feb 22, 2009
  • #7
Some aftermarket BJ's are oversized to accomodate the LCA hole being reamed.

If it doesn't have a tight interference fit, I would not be comfortable using it. If you lose the BJ, you can slide down the road on the frame.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,210
17,894
224
Massachusetts
Feb 22, 2009
#8
  • Feb 22, 2009
  • #8
The BJ does press in from the bottom though. The bottom of thr BJ is welder to held prevent it sliding through. The spindle is going to pull the balljoint up while the spring pushing the A-arm down. It's always going to be in interference because of that.

For it to pull through would require a serious failure of the structure of the A-arm around the BJ. Of course i'm not going to say it won't happen for liability reasons. Use your better judgement, but people have been replacing balljoints in many vehicles for a long time and failures are relatively rare.

Just look at how the BJ sits int he A-Arm and how the forces will act on it and use your common sense really.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
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129
Feb 22, 2009
#9
  • Feb 22, 2009
  • #9
If there's not a tight fit at the base, there can be longitudinal and lateral slop (the spindle receives the BJ's tapered shaft. This is not an absolute retention mechanism). With the kinds of load on the that base-point, it wouldn't take long for it to fail. This is one reason the OEM's generally don't condone replacing BJ's alone. BJ's have separated before even when there is no slop.
 

BlownFiveLiter

have car, will race....wait, it doesn't run
15 Year Member
Nov 29, 1999
3,133
18
108
Chicagoland
Feb 22, 2009
#10
  • Feb 22, 2009
  • #10
If you have enough cause for concern, have a muffler shop throw a couple of welds on it. You'd have to grind the welds off and press it out to change it the next time.
 
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