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#1 |
Registered User
Join Date: Mar 2009
Location: Ottawa, Ks
Posts: 18
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torsion box question
My rocker boxes are rusted out and i am thinking about just taking them the rest of the way out and leaving them out but not sure if thats the way to go. i'm not sure what the purpose of them is besides to protect the torsion bar that runs through there which is also rusted apart. Can someone give me some advise and knowledge of what the rocker boxes are for and what to do? this has probably been discussed before but im not finding a discussion on it. pics of a rocker box replacement would be great to.
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56 GMC Coe 3 door 49 GM COE custom built street rod 84 Blazer 12in Lift 70 Nova pro street project Last edited by BLAZEtoBLAZE; 09-23-2009 at 03:27 PM. |
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#2 |
Registered User
Join Date: Feb 2009
Location: St.Anne IL
Posts: 33
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Re: rocker box question
The rocker boxes are very important especially when the top is removed. This is a support of holding the body tub together since there is no overhead structure.
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#3 |
Registered User
Join Date: Mar 2009
Location: Ottawa, Ks
Posts: 18
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Re: rocker box question
thats all i need to know. im going to replace them and figure out something to use to replace the torsion bar in there also. thanks
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56 GMC Coe 3 door 49 GM COE custom built street rod 84 Blazer 12in Lift 70 Nova pro street project |
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#4 |
Registered User
Join Date: Feb 2009
Location: St.Anne IL
Posts: 33
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Re: rocker box question
If you buy the replacements from a place like LMC, the bar you are talking about come with the replacement rocker box. They are a little pricey, but, that is money well spent.
Last edited by WILE E; 09-23-2009 at 01:18 PM. Reason: spelling |
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#5 |
Registered User
![]() Join Date: Jan 2007
Location: Columbus, Ohio
Posts: 4,339
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Re: rocker box question
When you get the replacement boxes there is a bar in them already...so by replacing them you will get both.
Also if you are going to do body work on a blazer - you need to follow a few steps: 1. Don't take the top off until after the body work is done 2. Replace the Body Mounts if they are rotted/gone prior to starting 3. Brace up the door openings (and take measurements) to make sure the firewall doesn't sag if the body is weak when you start cutting out metal. |
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#6 | |
Registered User
Join Date: Mar 2008
Location: Spring, Texas
Posts: 207
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Re: rocker box question
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#7 |
Old School, New Style
Join Date: Jun 2005
Location: Monroeville, Ohio
Posts: 790
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Re: rocker box question
Top or not, you will probably be using doors right? Just make sure everything is lined up before doing your final welding.
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The Good: - 72 GMC Jimmy 4x4 - 307 cid / 350 th - 70 Chevy Suburban 1/2T 2wd - 454 cid /400 th - 96 Chevy Impala SS - mainly stock - 98 Chevy Tahoe LT 4x4 - all stock The Bad: - 86 Chevy Suburban 1/2T 4x4 - winter beater The Ugly: - 72 Chevy Suburban 1/2T 2wd - parts truck |
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#8 |
Registered User
Join Date: Mar 2009
Location: Ottawa, Ks
Posts: 18
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Re: rocker box question
i happen to live 30 minutes from LMC in lenexa, Ks and been getting all my parts through there so far. thanks i didnt know the torsion bars came with them. guess ill be heading up that way sometime soon.
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56 GMC Coe 3 door 49 GM COE custom built street rod 84 Blazer 12in Lift 70 Nova pro street project |
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#9 |
New Member
Join Date: Jun 2007
Location: Coos Bay, OR
Posts: 1,077
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Re: rocker box question
You better change that to "torsion boxes" or you will get the lecture explaining what the differences of rocker boxes and torsion boxes are.
Last edited by drunkbus; 09-23-2009 at 02:42 PM. |
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#10 |
Registered User
Join Date: Mar 2009
Location: Ottawa, Ks
Posts: 18
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Re: rocker box question
thanks guys. i have already replaced the body bushings and the front and rear pillar panels on the passenger side. i guess i messed up a little bit not having the top on but we did have a porta power going from the roll bar to the windshield frame and made sure all the measurements were correct before welding it all up. after we welded it all in, got the porta power out, and put the windshield in it did sag a little bit so im hoping that replacing the "torsion" boxes and torsion bars will cure that. the torsion bars are rusted completely in half!!
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56 GMC Coe 3 door 49 GM COE custom built street rod 84 Blazer 12in Lift 70 Nova pro street project |
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#11 |
Junior Member
![]() Join Date: Oct 2005
Location: Bakersfield, CA
Posts: 305
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Re: rocker box question
Wish I would have found this site and these steps before I did mine. It's not too out of whack but definitely noticeable.
1. Don't take the top off until after the body work is done 2. Replace the Body Mounts if they are rotted/gone prior to starting 3. Brace up the door openings (and take measurements) to make sure the firewall doesn't sag if the body is weak when you start cutting out metal. |
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#12 |
Registered User
Join Date: Mar 2009
Location: Ottawa, Ks
Posts: 18
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Re: rocker box question
yeah i know. ok i feel like a dumb a**. this is the first 69-72 blazer i have ever owned or worked on for that fact. what is the difference between a rocker box and torsion box??? I called them rocker boxes because thats what LMC calls them in their catalog.
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56 GMC Coe 3 door 49 GM COE custom built street rod 84 Blazer 12in Lift 70 Nova pro street project |
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#13 | |
New Member
Join Date: Jun 2007
Location: Coos Bay, OR
Posts: 1,077
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Re: rocker box question
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