What years will fit 1986 F250 rear axle
#2
Does EC stand for extended cab? Ford calls it supercab. If so, you should have a Dana 50 TTB up front and a Sterling 10.25" in the rear. 86 was the first year for the Sterling axle. If not a Sterling you have a Dana 60. As far as I know any superduty will work. In the late 90's it went to a 10.5" diff, but same mounting as yours.
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