I bought my 1979 Fairmont Squire in 1997, when worked for a Canadian company down in Guadalajara, MX. Y si, hablo espanol, y Francais.
Unlike US or Canadian-built Fairmonts, mine came with a 5 mains 302, and a non-ford rearend, and a hooped vinyl ceiling inside.
I don't have the build-sheet (orden de la fabrica), but the Axle Option on the serial plate on the driver's door says "A":
The factory shop manual (US) for 1979, Lists A as a 3:50:1 ratio differential, and 5 as a 3.07:1 differential.
The problem is that mine is a 7.5" axle, the 3rd member does come off, and the rear cover does have a fill plug. The best I can find is an Argentinian site that it is a Dana 30 rearend. If that's the case (si es asi), then I could get a 3.27 or 3.45 set of gears in there to improve the torque at different shift points (I'm changing to a standard 4 speed transmission off of a 6 cylinder car)
Did the Mexican Ford assembly plants use Dana rear ends or, does the Mexican shop manual (Chapter 15) have a different code for the axles?
The tag on the rearend reads:
4314
3.07
One number above the other, as typed.
Kind of stuck without going to a shop.
The other difference with this axle setup is the inner brake drum diameter.
3 days before we left Guadalajara, I had all new shoes and drums and discs installed. The trip was 2,600 miles, back to Winnipeg Canada. At the border crossing, they told me that I had 30 days to have the car Safety Certified and Licensed, and that I had to return and show them the new Canadian registration.
The mechanic could only find one issue. The rear drum walls were too thick, meaning the shoe diameter was too small, as if they were worn down, below standard US/CDN standards. I got new Canadian drums and shoes, and he certified it. The axle shaft ends say MEX on each side. He didn't give a fig. Rules are rules. Donkeys are all around, not just pulling milk and bread wagons.
Me gustaria si algien me puede aclarar esta duda, del eje. Por favor.
I hope someone can clear up this Differential mystery, please.
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