These cars are unknown to me but, I do not know of a 4cyl
automatic-transmission which will tolerate the torque of a six cylinder
without blowing up.
2nd hand trans are usually cheap....and a gamble, but this would be one way
of seeking a solution to converting your zephyr (weren't those English?).
The C3 and C4 were available on the 140/2.3 and the 200/3.3 in 1980. The
255 V-8 was a C4 only affair. Other years were similar... and the C5 showed
up in 1982 behind the I-6 and V-8 as the C4 replacement. The V-8 was gone
in 1983, the car line was then retired / rebadged.
There was no AT OD in 1980 or otherwise from the factory on the
Fairmont/Zephyr. The 6 could have had a C3 or C4, or a homebrew OD setup
from an LTD or Thunderbird...
The carbed I-6 got pretty decent economy for the day, even being choked
w/emission controls. It was a silky smooth but anemic powerplant in it's
Dad's Zephyr was custom-ordered before we left Japan in '80. He got the
highway gears in the diff (don't remember the ratio) and the 4-spd overdrive
M/T for mileage. We did an awful lot of x-country driving in that car!
Never had a maintenance issue with it, either. It made numerous trips from
Idaho to South Carolina and from Maryland to Florida. Matter of fact, the
only real problem we had with it were the Firestone 721 radials... The
separating tread and all.
Do you have any web references to older Asian-market Fords? That would be
interesting. I'm wondering if the availability in Japan would have been
similar to Australia... except the Fairmont is/was an LTD/Falcon option, I
think. Did your Zephyr have the ESO option? Those ESO's were pretty nice
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