Ball joint size - Chevy Impala SS Forum
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post #1 of 14 (permalink) Old 09-10-2016, 09:44 PM Thread Starter
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Ball joint size

Been readin and want to hear from the auto cross/road course guys.

I put my car together bout 8 years ago and being young i forgot that the spindles/ball joints on my 94 frame were different than my 96 body had. Im debating on finding a set of 96 arms/spindles to get the bigger bj's. The car will basically be my garage queen if i get her done before i die but i when i take her out i want to beat on her a lil runnin the old state routes and county roads around here that are twisty and wild.

Will it be fine (with new parts) to run the 94 9/16 bj's or should i play it safe n get the 5/8 bj's?

Anyone had a 9/16 fail while pushin the car hard?

96 BBB 9c1. Rebuilt out of lets just say north of 30 cars.
94 MGR L99. Met a bridge.
92 White L03. Ran to death.
94 OSP 9C1. Lawn ornament.
91 Silver L03. Whales on ice is sad.
94 Black 9c1 clone. Sacrificed.
92 DCM to flat black L03 RMW. Blowed up... twice.
96 Black Woody RMW. Cannibalized.
92 Grey RMS L05. New daily driver.
"i built it one piece at a time, and it didn't cost me a dime!" Johnny Cash
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post #2 of 14 (permalink) Old 09-11-2016, 10:36 AM
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I am not going to argue the 5/8" BJ is better than the 9/16" as it is bigger thus stronger.....

with that said after 20 years and a great deal of "canyon carving" with my 9/16" BJ SS...no broken BJ

I have not heard of a reported BJ breaking

\'96 BBB 383/T-56
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post #3 of 14 (permalink) Old 09-11-2016, 12:19 PM
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Ball joint breakage is usually due to lack of grease on a regular basis. If you use a top name brand, like MOOG, you should not have a problem. Cheapies are not made of the higher grade metal, and more subject to fracturing from stress. You can get the 5/8 inch spindles and arms from any 9C1 between 93-96.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #4 of 14 (permalink) Old 09-11-2016, 04:15 PM Thread Starter
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Well crap. Thanks fred. The chassis i used is a 94 9C1. Guess i didnt have to worry.

96 BBB 9c1. Rebuilt out of lets just say north of 30 cars.
94 MGR L99. Met a bridge.
92 White L03. Ran to death.
94 OSP 9C1. Lawn ornament.
91 Silver L03. Whales on ice is sad.
94 Black 9c1 clone. Sacrificed.
92 DCM to flat black L03 RMW. Blowed up... twice.
96 Black Woody RMW. Cannibalized.
92 Grey RMS L05. New daily driver.
"i built it one piece at a time, and it didn't cost me a dime!" Johnny Cash
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post #5 of 14 (permalink) Old 09-11-2016, 05:00 PM
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Most of the failures were actually due to insufficient torque on the castle nut as delivered from the factory. But as long as you've got the torque right, and the spindle taper hasn't deformed, you'll be fine with a 9/16" joint.
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post #6 of 14 (permalink) Old 09-11-2016, 08:23 PM
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5/8 bj

Quote:
Originally Posted by Fred Kiehl View Post
Ball joint breakage is usually due to lack of grease on a regular basis. If you use a top name brand, like MOOG, you should not have a problem. Cheapies are not made of the higher grade metal, and more subject to fracturing from stress. You can get the 5/8 inch spindles and arms from any 9C1 between 93-96.
Fred, I appreciate your knowledge on our cars but have to disagree to this one item. I have a 93 9C1 and I went out after reading your reply. and measured mine to be sure. I had bought MOOG BJs for my rebuild and thought "Well Shyt." They are 9/16ths. I believe the 5/8 inch came out in late 95 and on 96s. If I'm wrong here then I guess my lower control arms were replaced somewhere along the line.


Mark: Snowman-33

93 9C1: Work & Cubic Ca$h This started with a new headlight and fender Celeritas In Conficiendo
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post #7 of 14 (permalink) Old 09-11-2016, 10:17 PM Thread Starter
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Wel i looked it up on rock auto. I know parts stores aint the beat way to get info but it did show police package 5/8 for 94 and showed 2 different moogs for 93. Not sayin either of u r wrong tho. Guess ill measure when i tear it down here in few days. Actually while we are one it does anyone know the size of the balljoint housing on lower arm if its different?

96 BBB 9c1. Rebuilt out of lets just say north of 30 cars.
94 MGR L99. Met a bridge.
92 White L03. Ran to death.
94 OSP 9C1. Lawn ornament.
91 Silver L03. Whales on ice is sad.
94 Black 9c1 clone. Sacrificed.
92 DCM to flat black L03 RMW. Blowed up... twice.
96 Black Woody RMW. Cannibalized.
92 Grey RMS L05. New daily driver.
"i built it one piece at a time, and it didn't cost me a dime!" Johnny Cash

Last edited by Shilaeli Hugger; 09-11-2016 at 10:19 PM.
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post #8 of 14 (permalink) Old 09-11-2016, 10:46 PM
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Quote by Bill H., who's probably done the most research in regards to this swap, from another one of the numerous 5/8" ball joint threads.

Quote:
Originally Posted by Navy Lifer View Post
Only late 95 & 96 (Caprice) 9C1 sedans & 1A2 wagons got the larger ball joint in production.

Mike - '94 BBB SS (RIP 06/16) - '95 DGGM SS - '96 DCM SS - '92 BBB Wagon
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post #9 of 14 (permalink) Old 09-11-2016, 10:51 PM
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BJ

Quote:
Originally Posted by Shilaeli Hugger View Post
Wel i looked it up on rock auto. I know parts stores aint the beat way to get info but it did show police package 5/8 for 94 and showed 2 different moogs for 93. Not sayin either of u r wrong tho. Guess ill measure when i tear it down here in few days. Actually while we are one it does anyone know the size of the balljoint housing on lower arm if its different?
I stand corrected. I just looked at RA site and it shows the 5/8 bj on the 94 9c1. My 93 does take the 9/16 though and it's correct for the year. I guess I should go back and scrounge a little more off the two 94 9C1s I have been getting parts from. I love to learn, weather I'm right or wrong. I've learned so much here. Thanks SH


Mark: Snowman-33

93 9C1: Work & Cubic Ca$h This started with a new headlight and fender Celeritas In Conficiendo
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post #10 of 14 (permalink) Old 09-12-2016, 11:57 AM
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regardless of all the speculation and misinformation so far, only very late '95 and '96 9c1's have 5/8 Ball joints. Anything to the contrary is wrong.

Jim B.

'95 9c1, pcmperformance.com 93 tune, Dynomax Ultraflo catback, K & N box filter, LT4 KM, 160 stat, 3.08 Posi.
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