How to: Install Torque Box Reinforcements - Forums at Modded Mustangs
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post #1 of 30 Old February 28th, 2010, 10:48 PM Thread Starter
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How to: Install Torque Box Reinforcements

To reinforce the torque boxes you have 1 of 2 options. You can either weld the seams or you can get a reinforcement kit like I did. After installing the kit I would almost recommend welding them until you need more support. The kit isnt bad to install, its just real time consuming and you need an extra set of hands to help.

Before you start you need to remove the back seat and scrape all the sound deadening off the floor from under the seat and up into the trunk area. I removed the rear axle assembly since the axle tubes have to be welded up. Since the control arms will be removed anyway, there isnt much left to unhook to get the rear axle out. There is a lot of room to work with the axle assembly out so I would go that route if doing this kit. Before I started, I painted all the parts that were to be on the outside of the car

Lower torque box kit:

From inside the car, unplug the abs sensor plug that should be located on both sides by the quarter panel trim. With the sensor unplugged, push the rubber grommet that the sensor wire goes through, down through the floor. From under the car, unbolt the bracket that holds the sensor wires with an 8mm socket. Once unbolted, pull the wiring through the hole and set it aside. Next, ubbolt the bracket that is holding the ebrake cable which will be located right next too the bracket for the abs wiring

On SN95 Mustangs (96-04) you need to open up the hole that the torque box bracket goes into.




Once the opening has been made big enough, slide the bracket up into the hole and hold in place with a control arm bolt. (On the kit I got, I had to open the hole in the bracket big enough for the control arm bolt to fit.) There are left and right sides to the lower box kit. With the bracket held in place with the control arm bolt, the other 4 holes should be up against the floor. Using a 3/8" drill bit, drill from under the car through the 4 holes. From the inside, line up the 6x6 plate with the holes. (There are left and right of these also) Once the holes are aligned, bolt together using the supplied hardware that comes in the kit. The kit I got says to put the bolts up from under the car but I did it the other way with the bolts going down through the floor. That way if a nut happens to come off, your not driving over the 1 1/4" long bolt.





After the plate and bracket were bolted into place, I drilled a 3/4" hole down in the center of the bolt pattern. A 3/4" hole is big enought to slide the plug for the abs wiring through. Cut the rubber grommet off the wiring assembly and slide the wire up thought the hole. Plug the wire back in. Use silcone around the wiring to fill the hole.





The lower kit is now done.

Upper torque box kit

Drill a 1/2" hole straight up (at a right angle the sheet metal on the inside of the torque box) through the 1/2" hole that is already in torque box. The inner hole on my car was more of an oval so if yours is also, dont start with that one.




After the hole is drilled, put the torque box bracket in place and slide a 1/2" bolt throught the floor and have someone hold it there. From the inside of the car, slide the cruved floor plate over the bolt. Put the angled spacer over the bolt and snug it down with the supplied nut. With the plate snugged down, drill the other 1/2" hole the same way you did the first one. I used a unibit to inlarge the holes in the floor slightly to better align the curve floor plate. Put another bolt in the second hole and snug that one down the same way you did the first.



Have someone hole the bottom of the curved floor plate with a pc of wood so it is tight against the floor. I cut a piece of wood so it would hold the plate tight. From under the car, drill the 2, 3/8" holes that are in the front of the bracket. Bolt in place with the supplied 3/8" bolts.





Tighten all the bolts up but dont tighten the 1/2" bolts to much or it will start to suck the floor down.


If you are going to weld the floor plates in place, trace around the outside of the plates and remove them. Now take and remove the paint along the lines that you just made by tracing the plates. Bolt everything back in place and weld the plates to the floor. After everything is welded, paint the exposed welds and plates to prevent rusting.

Reinstall the rear seats and the rear axle assembly and you are finished.

If you have any questions or if you know I forgot anything, please let me know

Edit: thanks to caspergt for informing me before hand to get a long 1/2" drill bit for drilling the holes


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Last edited by F8L GT; March 2nd, 2010 at 11:48 PM.
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post #2 of 30 Old February 28th, 2010, 11:01 PM
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repd

nice job


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post #3 of 30 Old February 28th, 2010, 11:04 PM
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yeah man good job

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post #4 of 30 Old February 28th, 2010, 11:08 PM
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this will be very helpful.. nice work.

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post #5 of 30 Old March 1st, 2010, 11:10 AM
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Nice job Mike. What are the pro's on doing this?

Looks like you need to update your 'Garage'

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post #6 of 30 Old March 1st, 2010, 12:35 PM
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Great job!! I am going to do this when I put my cage in.
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post #7 of 30 Old March 1st, 2010, 12:36 PM
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Whos kit did you use?
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post #8 of 30 Old March 1st, 2010, 12:56 PM
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i plan on doing this sometime in the future, but ima give you reps now cause i love the write up man.



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post #9 of 30 Old March 1st, 2010, 01:00 PM Thread Starter
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Quote:
Originally Posted by mikejones16 View Post
Nice job Mike. What are the pro's on doing this?

Looks like you need to update your 'Garage'
pros are that your torque boxes wont get ripped out when doing hard launches


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post #10 of 30 Old March 1st, 2010, 01:03 PM Thread Starter
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Quote:
Originally Posted by Quick99 View Post
Whos kit did you use?
Got it from Energizer Racing Parts on Ebay


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post #11 of 30 Old March 1st, 2010, 02:19 PM
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ummm i have no idea what the torque boxes are

Quote:
Originally Posted by XTCNAGT View Post
That's what you get for excercising.

You think my lungs and chest hurt when I drive down the road for a triple baconator? No. You know why? Cause I'm smart.

Time for a nap.
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post #12 of 30 Old March 1st, 2010, 02:20 PM Thread Starter
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torque boxes are where the control arms in the rear bolt to the car. from the factory they are only held in by spot welds and over time of hard launching, the spot welds can start to pull out


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post #13 of 30 Old March 1st, 2010, 02:28 PM
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Wonderful write up. Reps. Now you will have expereince when you come down and do mine!


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post #14 of 30 Old March 1st, 2010, 03:19 PM
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Put it in the how to sticky.



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post #15 of 30 Old March 1st, 2010, 09:17 PM
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please sticky it. i think it would be very helpful

Quote:
Originally Posted by XTCNAGT View Post
That's what you get for excercising.

You think my lungs and chest hurt when I drive down the road for a triple baconator? No. You know why? Cause I'm smart.

Time for a nap.
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post #16 of 30 Old March 1st, 2010, 09:20 PM Thread Starter
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Quote:
Originally Posted by zigbigadoru View Post
please sticky it. i think it would be very helpful
its been put in the how to sticky


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post #17 of 30 Old March 1st, 2010, 09:36 PM Thread Starter
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Quote:
Originally Posted by mikejones16 View Post
Nice job Mike. What are the pro's on doing this?

Looks like you need to update your 'Garage'
DONE


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post #18 of 30 Old March 1st, 2010, 09:37 PM
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Quote:
Originally Posted by F8L GT View Post
its been put in the how to sticky
Yep



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post #19 of 30 Old March 2nd, 2010, 01:38 AM Thread Starter
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Quote:
Originally Posted by M.P. Cobra Fan View Post
Wonderful write up. Reps. Now you will have expereince when you come down and do mine!
you set up the ladys and ill set up your torque boxes


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post #20 of 30 Old March 2nd, 2010, 03:34 AM
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Nice work, +Reps...


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