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How-to change lower control arms

This is a discussion on How-to change lower control arms within the How To Write-Ups/Tech Tips forums, part of the W Body Tech category; Are your ball joints worn out or bushings shot? It's easier to change the whole lower control arm (lca) out ...

  1. #1
    I live here. dsmuts's Avatar
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    Default How-to change lower control arms

    Are your ball joints worn out or bushings shot? It's easier to change the whole lower control arm (lca) out then to change just the failed part and through rockauto they are only a little over $100 shipped for both sides. Here is my how-to on changing them.

    Tools you need:
    18mm wrench
    21mm wrench
    3/4" wrench
    T-55 torx bit
    13mm wrench and socket
    Hammer
    Pliers either needlenose or a pair of side snips
    Screwdriver
    Pickle fork
    Impact really speeds things up
    Possibly a sawzall



    1. Jack the vehicle up and remove the tire.

    2. Pop all the plastic clips off that hold the wires for the wheel speed sensor. Screwdriver works well for this.



    3.Take the bolt out on the rear of the lca. 18mm and 21mm wrench.



    4.Take the sway bar endlink off. 13mm wrench and socket. If yours are fairly old they will most likely snap so this is where the sawzall comes in handy.



    5.Take the front bolt out on the lca. T-55 torx and 21 mm. You can see the bushing is shot on this one.



    6. Remove the cotter pin on the ball joint and take off the castle nut on the ball joint. Pliers and 18mm. If the ball joint doesn't cooperate the sawzall will come in handy again.



    7. Use pickle fork and hammer it inbetween the ball joint and spindle. Sorry I didn't get a pic of this I was pretty greasy by this time.

    8. Put new lca in place and put the new nut that comes with it on the ball joint. Don't put the grease zerk in until the end just in case you have to jack it up to get stuff in place. Tighten the nut (3/4" on the new one) and install the new cotter pin.

    9. Put the rear bolt into place wiggling it around and using the screwdriver to line it up. 18mm and 21mm wrench

    10. Put front bolt in using the same technique. T-55 torx and 21mm

    11. Put sway bar end link back in. 13mm wrench and socket

    12. Put all the clips back in on the wheel speed sensor wire.

    13. Put the wheel back on and release the jack

    14. Enjoy the new found no clunking front end.
    98 GTP 230K miles scrapped
    04 Comp G 180*, HAI, poly db's, zzp stb's, UMI ta's, Speedbuilt sways, DNA springs
    S1x, sd headers in the works

  2. #2
    GXP Level Member txslow6's Avatar
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    Default Re: How-to change lower control arms

    Lol I was going to do a write up on how to do this when I did mine. Looks like I won't have to now. Nice write up.

    Anyone that hasn't done this, it's by far one of the easier things to do on this car.

  3. #3
    GTX Level Member FriboRage's Avatar
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    Default Re: How-to change lower control arms

    Is it the same for the 04 comp g? I think I remember reading somewhere on here they changed the control arms and other parts of the suspension for 04-05 and then went back to the old way for 06+
    2008 Grand Prix: Done: Intake, plog, zzp 2.5" catted dp, hv3 (SOLD)
    2004 Grand Prix GTP Comp G: Intake, headers, Overkill. Sport Edition Kv5 18x8 Soon to come Inferno Hood, SE Air Dam!

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    I live here. Scottydoggs's Avatar
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    Default Re: How-to change lower control arms

    changing lca's is even easier when your sub frame is on Bills garage floor...

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails and a bone stock engine. http://www.grandprixforums.net/scott...-gs-47574.html

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    GT Level Member iRideGTP's Avatar
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    Default

    great how-to! will definitely come in handy when i replace my lca

  6. #6
    SE Level Member illy's Avatar
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    Just did it on my 04 comp g with no write up. Very easy


    Sent from my iPhone using Tapatalk

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    I live here. dsmuts's Avatar
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    Default Re: How-to change lower control arms

    Quote Originally Posted by FriboRage View Post
    Is it the same for the 04 comp g? I think I remember reading somewhere on here they changed the control arms and other parts of the suspension for 04-05 and then went back to the old way for 06+
    I believe everything is the same except the sway bar end link but I'm not certain.
    98 GTP 230K miles scrapped
    04 Comp G 180*, HAI, poly db's, zzp stb's, UMI ta's, Speedbuilt sways, DNA springs
    S1x, sd headers in the works

  8. #8
    SE Level Member apok's Avatar
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    Default Re: How-to change lower control arms

    On my 04 GT2 the sway bar is connected to the sway bar link, and neither are connected to the control arm.

  9. #9
    SE Level Member valente's Avatar
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    Default Re: How-to change lower control arms

    1 question? how do you know when you need them changed.

  10. #10
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    Default Re: How-to change lower control arms

    if you jack up the car, take the wheel off. and see this like he posted in the pic. and have loud clunking when you go over bumps and turns. or have over 100,000 miles or more your due.


    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails and a bone stock engine. http://www.grandprixforums.net/scott...-gs-47574.html

  11. #11
    SE Level Member valente's Avatar
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    Default Re: How-to change lower control arms

    Quote Originally Posted by scottydoggs View Post
    if you jack up the car, take the wheel off. and see this like he posted in the pic. and have loud clunking when you go over bumps and turns. or have over 100,000 miles or more your due.
    Thanks ,im going to have to doit this weekend cause im getting a clunking noise when i hit a bump.Thanks again

  12. #12
    I live here. Scottydoggs's Avatar
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    Default Re: How-to change lower control arms

    lca's are a boat load cheaper if you order them on line. i got mine for 42 a side. 98 shipped. from partsgeek. rockauto has real good prices too. i just went with the dorman arms, they are working just fine.

    parts stores wanted 70 a side, f them.....

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails and a bone stock engine. http://www.grandprixforums.net/scott...-gs-47574.html

  13. #13
    SE Level Member valente's Avatar
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    Default Re: How-to change lower control arms

    I buy most of the parts from rockauto,have not tried partsgeek yet.I am goint to compare prices and see who gives out the best deals.thanks again

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    GT Level Member ill12will8's Avatar
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    Default Re: How-to change lower control arms

    i cant get this thing lined up for the life of me
    1997 Artic White GTP: Stock (I call her "Brooke")
    2000 Silvermist GTP: ZZP DP, CAI w/ 9" open cone, Dorman front sway bar, PEMs, AL605 -DEAD & GONE

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    I live here. dsmuts's Avatar
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    Default Re: How-to change lower control arms

    Shove a screwdriver into where the bolt goes and wiggle it around until it lines up.
    98 GTP 230K miles scrapped
    04 Comp G 180*, HAI, poly db's, zzp stb's, UMI ta's, Speedbuilt sways, DNA springs
    S1x, sd headers in the works

  16. #16
    SE Level Member Black97GTP2dr's Avatar
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    What helped me was putting a block under my rotor and jacking it up...made it much easier.

    Spectre Open cone+SD hood+Limo rear, 20% front+tinted tails+pioneer 6x9's+pioneer deck= My toy
    Tranny build this winter, then VS cam and headers the next, hopefully sooner...

  17. #17
    GT Level Member Freddy's Avatar
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    Default Re: How-to change lower control arms

    i saw the torque specs on one other post but now i cant find it...do you know what they are?

  18. #18
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    Default Re: How-to change lower control arms

    the spec is tight!

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails and a bone stock engine. http://www.grandprixforums.net/scott...-gs-47574.html

  19. #19
    SE Level Member Black97GTP2dr's Avatar
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    ^x2 lol

    Spectre Open cone+SD hood+Limo rear, 20% front+tinted tails+pioneer 6x9's+pioneer deck= My toy
    Tranny build this winter, then VS cam and headers the next, hopefully sooner...

  20. #20
    I live here. dsmuts's Avatar
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    Default Re: How-to change lower control arms

    I just crank them down really tight.
    98 GTP 230K miles scrapped
    04 Comp G 180*, HAI, poly db's, zzp stb's, UMI ta's, Speedbuilt sways, DNA springs
    S1x, sd headers in the works

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