Team Camaro Tech banner

Convertibles During Assembly Line Build?

1 reading
3.6K views 11 replies 9 participants last post by  327!275hp!Convt!  
#1 ·
I have been watching a number of YouTube videos (& reading information) concerning convertible top installations. Even very experienced "convertible top guys" take a long time putting a new top on cars. I'm talking about days of trial & error, mirror adjustments, and also needing the right temperature for stretching the vinyl top material. So... I got to wondering, what did the assembly line workers do back in the 50's & 60's? Did the assembly line just build the car & then turn it over to the " convertible top guys?" Did each brand new convertible take several more days to finish compared to a regular production hardtop? Could the assembly line crank out a good number of finished convertibles each day? Any of you old timers out there work for GM in 60's & actually see the process & steps involved concerning the convertibles? I'm just wondering, as I'm on the fence & considering a DIY top installation. With summertime coming, Mr. Sunshine apparently can lend me a hand with the installation down here in ye olde Lone Star State. Thanks for any input now, y'all hear? 🤠
 
#2 · (Edited)
From John Hinkley's (AKA John Z) Assembly Report...

Fisher Body - Trim Shop Operations
When the body was released from the Paint Shop and it was sequenced into the delivery conveyor to the Trim Shop, Fisher's computer generated their version of a "Broadcast Copy" for each car, called a "UOIT" (Uniform Option Identification Tag), which identified the color, trim, and options information for the Trim Shop build of that particular car; that document was placed on the car at the transfer station for worker reference. (CRG is actively searching for additional copies of these UOIT papers - please contact the CRG if you can supply us with a copy.)
Wiring and the roof insulator went in first, followed by the headliner and sail panel and shelf trim and garnish moldings (and rear speakers or defroster if ordered), and the windshield and backlite opening flanges had the molding clips installed and were primed for later glass installation (vinyl tops went on ahead of this so the rear edge could be trimmed in the backlite opening before glass priming). Convertible windshield frame trim moldings and latch hardware were installed, along with the power top mechanism, plumbing, and wiring.

Convertible tops were built up on an off-line merry-go-round fixture, then carried to the line where the installation was completed; a protective shipping cover was installed over the top skin after final inspection before the body was shipped to Chevrolet.

____


You can read the report in its entirety here...CRG Research Report - Camaro Assembly Process (camaros.org)
 
#5 ·
When I installed my top, I often thought about some sort of jig that would help with the installation of the rear curtain (rear window) and vinyl top.

The jig would be completely external to the car. It would hold the rear bow and hold the tack strip in position exactly like as if it was on the car.

The jig would give me access to the side of the tack strip where the staples are installed. The lack of access to the staples is what makes the installation of a convertible top so frustrating.

The rear bow and tack strip are bolted to the jig. The well liner is stapled to the tack strip. It would be easy to pull the rear window tight and staple it to the tack strip and rear bow because it is all out in the open. After the well liner, convertible top pads, rear curtain, and vinyl top are stapled to the tack strip and rear header bow, the entire assembly is then transferred from the jig to the car for the rest of the assembly.

90% of the installation time and frustration has to do with the back area that is fastened on the tack strip. I really thought that is how they did it at the factory.
 
#7 ·
When I installed my top, I often thought about some sort of jig that would help with the installation of the rear curtain (rear window) and vinyl top.

The jig would be completely external to the car. It would hold the rear bow and hold the tack strip in position exactly like as if it was on the car.

The jig would give me access to the side of the tack strip where the staples are installed. The lack of access to the staples is what makes the installation of a convertible top so frustrating.

The rear bow and tack strip are bolted to the jig. The well liner is stapled to the tack strip. It would be easy to pull the rear window tight and staple it to the tack strip and rear bow because it is all out in the open. After the well liner, convertible top pads, rear curtain, and vinyl top are stapled to the tack strip and rear header bow, the entire assembly is then transferred from the jig to the car for the rest of the assembly.

90% of the installation time and frustration has to do with the back area that is fastened on the tack strip. I really thought that is how they did it at the factory.
The fisher body manual shows wooden stick spacers for this area cut to a certain length to hold the bow in place during top install.
 
#8 ·
The tops were built on jigs off line that allowed all the adjustments to be made then, and then delivered to the line for installation into the body of the car. I worked with a guy that installed tops at one of the pontiac plants and he said they could do it in 11 minutes. The convertibles were spaced out at least 10 bodies (and likely further apart) to account for the time spent installing the tops. There were several teams on the trim line that their sole job was to install tops. They traveled with the body until the top was completed, and then went back to the start of the trim line to pick up the next convertible. In the mean time one (or more) of the other teams picked up any bodies that arrived before the first ones got back.
 
#9 ·
I worked with a guy that installed tops at one of the pontiac plants and he said they could do it in 11 minutes. /QUOTE]

This is the sort of answer I was initially looking for. But... I don't know for sure I am reading part of you response correctly. Are you meaning to tell me that assembly line workers could put a new vinyl convertible top on a car in eleven (11) minutes??? Let's even just say less than a half of an hour???? I would like to see an archived film of that procedure going down in the city, without any pity or love.
 
#10 ·
Are you meaning to tell me that assembly line workers could put a new vinyl convertible top on a car in eleven (11) minutes???
Image
That's the way I take it. After it's preassembled on the jig (aka "merry- go- round fixture"), taken to line, then 11 min to install on the body.....or did the 11 min include the time on the jig as well ? A video would be cool...

Good to see ya around, Mark!(y)
 
#12 ·
I see now what you are talking about concerning the 11 minutes aforementioned. If I’m reading you right. The assembly workers took the whole convertible frame with the top already installed on the “jig.” Then, they bolted the whole kit & caboodle to a car as it moved down the assembly line. That’s kind of cheating. :) That’s not starting from scratch as I was imaging. 🤩Eleven minutes was kind of blowing my mind down the road a ways. So… If one adds the length of time to put a top on the “jig,” the whole time process would move up exponentially.