Jump to content

How to safely install trunk torsion bars


Recommended Posts

Hi - This thread is designed to gather into one thread the information needed to safely install trunk torsion bars while keeping all your teeth in your mouth.

 

There are 5 or so threads discussing topics like "how many torsion rods should be installed" and "which notch to set the torsion rods into to provide the sufficient opening power", and "should I add a second torsion rod if I am adding a rear spoiler". If there is a thread that concisely shows "How to Install Trunk Torsion Rods", then I missed it. Please send me a link if you know of it.

 

I've watched some YouTube videos from guys installing trunk torsion bars on Cougars, Comets, and some of the 65-69 Mustangs but nothing in the 71-73 era. The ones I saw, they typically had to fabricate a tool or buy one online to safely install the torsion bars. There is a L-shaped tool with a u-shaped slot for the rod and a drilled hole for inserting the torsion rod but it wont work on this style of torsion bar. Then there are the guys who use a pair of vise-grips and muscle the torsion bars into place. One of those guys went to the hospital after the vise grip lost its grip and hit him in the face. However, none of the tools I've seen appear to work on the 71 torsion bars I have. I'm attaching pictures of the torsion bars and the hinge design.

 

I've concluded I'm not going to use vise grips. There must be a plethora of knowledge out there on how to safely install trunk torsion rods like the ones below.

 

I have a 71 coupe but I am adding a rear spoiler so I am going to install 2 rods rather than one to keep the trunk level and provide sufficient lift.

 

 

 

 

CAM01797.jpg

 

CAM01798.jpg

 

CAM01799.jpg

 

CAM01800.jpg

 

CAM01801.jpg

 

CAM01803.jpg

Link to post
Share on other sites
  • Replies 29
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

I have a set of torsion rods from a 71 coupe, shoot me a PM. 

The second Coupe/Vert torsion bar is very hard to find these days. If you have one bar in your car now, it typically it has the adjustable lever on the drivers side. If so, you need the rare second ba

I had two of them for sale on here for about a month. Just sold the second one today. I will see if I can scout out some more. I sold for $60.00 + shipping. You cannot use to R.H. springs has to be th

Posted Images

Hello Gray,

 

I am adding my thread to this thread. I went to Home Depot and got the strip of metal with the holes and used it. I mean, it is a bear.

 

https://www.7173mustangs.com/thread-1973-coupe-trunk-lid-tension-rods?highlight=trunk

 

West Coast Cougar has a unique tool, Unfortunately, it is out of stock.

 

https://secure.cougarpartscatalog.com/67trunkhingetool.html

 

Keep us posted on your progress.

 

mustang7173

Thanks,

mustang7173 🇺🇸

"Courage is being scared to death but saddling up anyway" -- John Wayne

Link to post
Share on other sites

Looks as though the original tool has been replaced with a more robust one. I sure wish I'd had one of these tools years ago. Almost lost a finger trying to help a friend adjust his torsion bars after he added a spoiler to his Mach1 using the "Vice Grip" method. Finally sent him to the body shop and I went in to nurse a very sore hand with a "Almost" broken finger! https://secure.cougarpartscatalog.com/trunktool2.html

Steve

 

No Officer...I really don't know how fast I was going, my speedometer stopped at 140!

Link to post
Share on other sites

here is the new tool

 

https://secure.cougarpartscatalog.com/trunktool2.html

 

I have done them in the past using a wrench and a big zip tie, but this would be much safer

http://www.7173mustangs.com/gallery/1_01_07_15_8_53_18.png

 

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!

Link to post
Share on other sites

I recently did this job. I purchased the tool mentioned above from West Coast Cougar and could not get it to work with my car (fastback body with the rear fold down seat). It may work on other body shapes and with out the fold down seat option. For me the purchase of this tool was a waste of time (and money) - it may have worked if I decided to get the grinder out and hack it to bits. There just wasn't enough room to place the tool and turn like their video shows (at least in my car).

So in the end I tried several tools such as pry bars but vice grips did the trick. When the torsion bars are installed correctly they are under reasonable tension so you need to be careful. Think about if you slip where your face (especially your eyes) are at the time. Wear good gloves too.

 

The catch is figuring out the correct way to install the torsion bars. When I initially attempted to install the bars the trunk would not remain open/stay up. I then noticed I could remove the torsion bars by hand - at this point I'm thinking what's all the fuss about these being dangerous, etc. I read the 71 Ford service manual, plenty of youtube videos and research on here and other sites but I struggled to figure it out exactly. The Ford service book said identify the left and right bars (there is a difference - your third photo sort of shows it) one of them was supposed to have a yellow paint mark on it but this was long gone for me. After many attempts (it seems there are a few configurations) when you install each bar you place one end of the bar at the pivot point, at the other end with the three adjustment notches using the vice grips you turn the bar thinking it terms of a circle three quarters of a turn then place it into one of the notches. For me the key was turning the bar three quarters of a circle to get the tension. Initially I was only turning the bar about a quarter to half a turn and this would not apply enough tension to keep the trunk open. The bar should be under decent pressure when inserting into a notch.

 

I used the vice grips to remove also just ensure the adjustment is tight and don't let go. You may (will) scratch some paint. I have a factory rear spoiler and the trunk stays open fine. There is a thicker version torsion bar that I've read others say you need for the rear spoiler. I have both - in my opinion the measurement difference is so little I cannot see how it would make a difference. I have the thinner version installed and it is working ok. I have the torsion rods in the position closest to the rear of the car. The difference in a successful installation may also be which bar gets installed first, ie. one bar goes under the other.

 

At the end of the day use a method that you are most comfortable with. The job does need some patience but the next time I do this it would be a five minute job as opposed to a one hour job!

Untitled.thumb.jpg.838a5a75c40e566d7d8c24c2a8b0d796.jpg

Link to post
Share on other sites

Good points. I used a heavy zip tie to hold the bar in place so that if it popped loose it would have a safety catch of sorts. Wearing eye protection is a good starting point

http://www.7173mustangs.com/gallery/1_01_07_15_8_53_18.png

 

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!

Link to post
Share on other sites

Looks as though the original tool has been replaced with a more robust one. I sure wish I'd had one of these tools years ago. Almost lost a finger trying to help a friend adjust his torsion bars after he added a spoiler to his Mach1 using the "Vice Grip" method. Finally sent him to the body shop and I went in to nurse a very sore hand with a "Almost" broken finger!  https://secure.cougarpartscatalog.com/trunktool2.html

 

Steve,

Thanks for posting the video that demonstrates the tool used for the Cougar torsion bars.  I've looked it over and the torsion bars for the 71 Mustang are different.  I don't think the particular tool will work on the torsion bars I posted pictures of.  I was happy to hear that your hand was only sore and not broken.  Last month I read a post about a guy who went to the hospital when the bar came lose from the vice grips.  I hope more guys post information on how to safely install trunk torsion bars. - Gary

Link to post
Share on other sites
  • 4 months later...

I made a tool to adjust the trunk torsion rods on my convertible. It works really well, feels locked in place and does not slip off. I have adjusted the rod up and down on the first and second notches, but not up to the third notch. That would be a lot of torque on the rod. It should work on coupes as well since the rod and trunk are setup the same way as a convertible, but I doubt it will work on a fastback.

 

No need to spend money on one. I used a piece of heavy gauge strap iron and drilled holes and bent it as you see in the pictures below. I think the key to it working so well was to create (drill) a open ended hook like hole on the end to keep the tool from slipping off the Torsion Bar when applying leverage. The second hole is 5/16" in diameter to keep it snug on the end of the rod and no more than 3 1/4" distance from right angle end, otherwise a metal lip where the rod wrap around will prevent the tool from hooking on to the rod.

 

Anyway I hope it helps....

 

20170703_064333.jpg

1973 H Code Convertible - Medium Copper Metallic - June 8, 1973, Built Ford Marketing Sales Vehicle

DSC_0266xsm.jpg

satellite.png Proud Space Junk Award Winner!

 

 

 

 

 

 

 

 

 

 

 

 

 

Link to post
Share on other sites

I've used a "long" tube to remove/place back that torsion bar, with a car hydraulic jack on wood blocks to support it.

I don't recall it was that challenging, just the kind of work you wish to have 4 hands.

73 modified Grande 351C. Almost done. 

71 429CJ. In progress

Link to post
Share on other sites

I'm intrigued. My trunk lid don't stay open. I'm going to take some pics and hopefully get some feedback on what's incorrect

Steve

1971 Grande

 

Link to post
Share on other sites

I'm intrigued.  My trunk lid don't stay open.  I'm going to take some pics and hopefully get some feedback on what's incorrect

 

Pictures are a big help. Do you have a Coupe/vert or fastback as the torsion rods are different. Be sure to mention if you have a spoiler and what notch your rod is currently set to.  I had a problem with trunk lid to quarter panel top alignment on the left and right sides. The trunk was being twisted slightly by the uneven torque applied by the one torsion rod. I added a second torsion rod on the other side and the trunk alignment problem was gone. If you currently have only a single rod, i would suggest installing the complimentary second rod. The left and right rods when used in pairs are different from each other. Also there was a grommet used to keep the bars from grinding and banging together where they crossed one another. I could not find one and had to make it.

 

 

DSC_02680.jpg

1973 H Code Convertible - Medium Copper Metallic - June 8, 1973, Built Ford Marketing Sales Vehicle

DSC_0266xsm.jpg

satellite.png Proud Space Junk Award Winner!

 

 

 

 

 

 

 

 

 

 

 

 

 

Link to post
Share on other sites

Its A Coupe. One bar fitted. Someone mentioned that one bar may make the deck lid be out of line. I didnt get a pic of hinges but the right one definately runs at a angle whilst the left one id straight. So may i got to fit the second bar. Heres a couple of pics showing position of the bar. The deck lid will not stay up

20170704_125013.thumb.jpg.37d0585a004be3cfc35627b00fd11e9f.jpg

20170704_125024.thumb.jpg.9b940b386aaf382c108ff27d1c7a94dd.jpg

20170704_125102.thumb.jpg.91096a41d14875abae3f6a49f1e47969.jpg

Steve

1971 Grande

 

Link to post
Share on other sites

Didn't know about any such tool when I did mine, I just used a big set of Vise Grips to wind the tension on and another set to hold the other end in place. Had no problem, BUT I must admit, a proper tool is far better and safer. Very good info for future times.

Reading posts above, mine is on a fastback with a spoiler, so it's got all the tension possible on both rods to hold it up.

Geoff.

Geoff.

 I learn something new every day!

Link to post
Share on other sites

Steve,

 

On the right hinge your torsion rod is in the upper most position which puts the least amount of tension on the trunk lid to keep it up. Most cars had the rod in the middle position on the right for tension. Try moving the rod to the middle position and see if it works.

Jeff

1972 Q Code Convertible

 

Link to post
Share on other sites

Steve,

 

On the right hinge your torsion rod is in the upper most position which puts the least amount of tension on the trunk lid to keep it up. Most cars had the rod in the middle position on the right for tension. Try moving the rod to the middle position and see if it works.

 

Thanks Jeff. Will try that ::thumb::

Steve

1971 Grande

 

Link to post
Share on other sites

Its A Coupe. One bar fitted. Someone mentioned that one bar may make the deck lid be out of line. I didnt get a pic of hinges but the right one definately runs at a angle whilst the left one id straight. So may i got to fit the second bar. Heres a couple of pics showing position of the bar. The deck lid will not stay up

 

Jeff is correct moving the bar to the middle will give it more tension, but the picture is upside down. So it is currently in the bottom position on the left side and moving it up will provide more tension. I flipped the picture right side up below...

 

20170704_125013.jpg

 

20170704_125102.jpg

1973 H Code Convertible - Medium Copper Metallic - June 8, 1973, Built Ford Marketing Sales Vehicle

DSC_0266xsm.jpg

satellite.png Proud Space Junk Award Winner!

 

 

 

 

 

 

 

 

 

 

 

 

 

Link to post
Share on other sites

Mine is a coupe. Set up as follows with only one bar, no issues keeping trunk open and no alignment issues.....

 

Passenger side is in top most slot. Drivers side is in middle slot.

73 Grande H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

 

- Jason

 

 

082-hot-rod-power-tour-2017-1970-1970s.jpg

 

Link to post
Share on other sites

Just for the heck of it, this is what my Mach 1 trunk torsion bars look like and their placement with a factory spoiler. It looks like the Fastback hinges and torsion bar locations are very different.

Picture are from left side to right.

Geoff.

 I learn something new every day!

Link to post
Share on other sites

Funny I just grabbed mine with my hand and moved it lower.  It didn't seem that difficult.  Maybe mine are weak?

 

What do you eat for breakfast? I need someone of that!

1973 H Code Convertible - Medium Copper Metallic - June 8, 1973, Built Ford Marketing Sales Vehicle

DSC_0266xsm.jpg

satellite.png Proud Space Junk Award Winner!

 

 

 

 

 

 

 

 

 

 

 

 

 

Link to post
Share on other sites
  • 3 years later...
Posted (edited)

I finally got the two torsion rods installed.  I need to upload some photos of them because the installation is not traditional.  I needed two torsion bars because I added the spoiler to the trunk making the trunk a bit heavy.  The second torsion bar works like a charm and I did not have to put it under a lot of tension.  To install the second torsion bar, I simply opened the trunk as high as it would go, and placed the torsion bar into the proper location on the trunk hinge and then found a reasonable spot for the other end to connect into.  When I close the trunk, it puts the torsion bar into tension.  When I open the trunk, it pops open with just enough force and it does not fall out of position.  I'll add some photos to show what I did.   

Edited by Gary
Link to post
Share on other sites
  • 4 weeks later...

I have my own little way of doing install and no danger. I have also put second rod in for when spoiler is installed on vert or coupe. You put the rod in place on the adjustment side in the middle and then just take a pipe wrench and twist the end of the rod until it goes into hinge. Then you put your jack under the rod and jack up and I use a seal puller to snap the rod into the hinge. 
I have one more L.H. spring if you have spoiler and need PM me $60.00 + ship. No special tools at all.

20200618_152330.jpg

20200618_152345.jpg

20200618_152607.jpg

20200618_152757.jpg

When a man is in the woods and talks and no women are there is he still wrong??:P

David

Link to post
Share on other sites

Where did you get the Torsion Rods or Torque Springs from ?  I can't find them anywhere for a 1971 Mustang Grande Coupe, unless you buy the entire DynaCorn Deck Lid kit for $400...??

Edited by 1971stang
spelling
Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...