Trunk lid will not stay open

7173Mustangs.com

Help Support 7173Mustangs.com:

Joined
Sep 12, 2015
Messages
6,263
Reaction score
1,250
Location
SW Ontario
My Car
1971 Mustang Mach 1, M code, 4 speed.
Interestingly enough now that I redid my trunk lid and the spoiler was moved to the correct location, it stays open on its own. I didn't think about it at that time, but before the spoiler was in the wrong location a couple of inches further back, which placed more force on the rods. Now it stays open as it should. That said, the location of the spoiler is something else to think about.
interesting Tony. Good point.
On my car it had a repop spoiler added to the dimensions shown in NPD's instructions. These dimensions are 1" further back than the dimensions shown on the 429 mega site. My trunk does stay open, just. Any further back and I certainly can see it not staying open at all.
 

Attachments

  • SpoilerLocation2.jpg
    SpoilerLocation2.jpg
    93.5 KB · Views: 0
Joined
Aug 14, 2014
Messages
3,760
Reaction score
690
Location
Madison, WI
My Car
1971 M-Code Mach 1 w/408C stroker
interesting Tony. Good point.
On my car it had a repop spoiler added to the dimensions shown in NPD's instructions. These dimensions are 1" further back than the dimensions shown on the 429 mega site. My trunk does stay open, just. Any further back and I certainly can see it not staying open at all.
Those are the dimensions that the shop followed.
 

JJHStang

Well-known member
Joined
Jul 25, 2019
Messages
50
Reaction score
12
Location
Texas
My Car
1971 Ford Mustang Mach 1
[url=https://ibb.co/b33Pn4f][img]https://i.ibb.co/6ZZm5Kd/20190723-095138-1.jpg[/img][/url]

[url=https://freeonlinedice.com/]black and red dice[/url]
I have viewed many pics and also measured the location from front of trunk (rear window) and the first screw is 9.5”.
Based on a picture I received of correct measurements my spoiler is positioned correctly.
I have made a prop stick. Last car show was at the wind was blowing in back to front so no issues with trunk lid shutting. Didn’t need the prop rod.:)
 

JJHStang

Well-known member
Joined
Jul 25, 2019
Messages
50
Reaction score
12
Location
Texas
My Car
1971 Ford Mustang Mach 1
[url=https://ibb.co/b33Pn4f][img]https://i.ibb.co/6ZZm5Kd/20190723-095138-1.jpg[/img][/url]

[url=https://freeonlinedice.com/]black and red dice[/url]
I have viewed many pics and also measured the location from front of trunk (rear window) and the first screw is 9.5”.
Based on a picture I received of correct measurements my spoiler is positioned correctly.
I have made a prop stick. Last car show was at the wind was blowing in back to front so no issues with trunk lid shutting. Didn’t need the prop rod.:)
Thank you Stanglover for the measurements.
 
Joined
Jan 9, 2015
Messages
330
Reaction score
28
Location
texas
My Car
'72 "mach" and a bunch of other stuff.
And for those following this don’t be like me.

the strut pictured does NOT work on a FB.

I welded some custom brackets. Pop riveted the mount to the trunk then found out it wouldn’t close. :(

new struts ordered to see if attempt two will work. :)
 

Attachments

  • 6D8E6B7B-E515-4690-87B1-69258517D94E.jpeg
    6D8E6B7B-E515-4690-87B1-69258517D94E.jpeg
    1.6 MB · Views: 0
  • 0769D500-A81A-4E1E-8358-4B0856EC1025.jpeg
    0769D500-A81A-4E1E-8358-4B0856EC1025.jpeg
    1.6 MB · Views: 0
  • 83FCE810-9FC7-4C93-95C1-7E043C19A89E.jpeg
    83FCE810-9FC7-4C93-95C1-7E043C19A89E.jpeg
    1.6 MB · Views: 0
Joined
Jul 27, 2012
Messages
2,980
Reaction score
181
Location
Brisbane - Australia
My Car
1973 Mustang Convertible
And for those following this don’t be like me.

the strut pictured does NOT work on a FB.

I welded some custom brackets. Pop riveted the mount to the trunk then found out it wouldn’t close. :(

new struts ordered to see if attempt two will work. :)
Hi there,

Sorry to see you didn't get a win there. Fitting gas struts to the hood or trunk lid can be a tricky process in general terms. For my convertible trunk lid, i did a DIY job,and guessed the length of rod i would need, and the mounting positioning of the two ends. In my case it turned out very well with no issues. I would imagine setting up for the fastbacks would be similar but maybe not quite the same exactly. I have never attempted to do that, so i can't speak with any experience to help you along there. In any case, the length of rod, the amount of gas charge, and the strut positioning are the crucial things to make it all work.

I got a professional installer to install my two hood struts as the setups were beyond my skill level. If you look at my pics below, it may give you some clues as to a mounting procedure that may be of help to you to follow. The red Mustang photo was sent to me by a fellow Forum member several years ago. He told me he had a win with his setup. Best of luck with it all.

Greg.:cautious:
 

Attachments

  • 2022-11-24 14_35_47-Trunk lid will not stay open _ 7173Mustangs.com — Mozilla Firefox.png
    2022-11-24 14_35_47-Trunk lid will not stay open _ 7173Mustangs.com — Mozilla Firefox.png
    952.1 KB · Views: 0
  • 2022-11-24 14_35_16-Trunk lid will not stay open _ 7173Mustangs.com — Mozilla Firefox.png
    2022-11-24 14_35_16-Trunk lid will not stay open _ 7173Mustangs.com — Mozilla Firefox.png
    570.5 KB · Views: 0
  • 2022-11-24 14_34_32-Trunk lid will not stay open _ 7173Mustangs.com — Mozilla Firefox.png
    2022-11-24 14_34_32-Trunk lid will not stay open _ 7173Mustangs.com — Mozilla Firefox.png
    756.8 KB · Views: 0
  • 2022-11-24 14_34_07-Trunk lid will not stay open _ 7173Mustangs.com — Mozilla Firefox.png
    2022-11-24 14_34_07-Trunk lid will not stay open _ 7173Mustangs.com — Mozilla Firefox.png
    942.6 KB · Views: 0
Top