I'm looking at adding a 1988 F350 CC dually to my collection to legitimize the dually rearend in the Centurion conversion, and add a ZF to my F250 4X4. The seller insists the truck has a 4 speed, but I can't find info anywhere that suggests a 4 speed was offered behind the F350 7.3 in 1988. Did all of the F350 CC 7.3 4X2's get the ZF in 1988. The trans door tag code is "C". Thanks in advance.
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