ABS?
 

i was looking at my ford yesterday and it doesnt seem to have any sign of having any abs. did the 91 f350's have any Abs at all?

not sure. i know my 89 bronco did. only rear wheel. got sensor off the diff.

how can i tell by the vacuum booster if it is abs or not

does the truck has an abs lamp on the dash?

i dont belive the put abs on the 1tons that early.

i dont see any lights on the dash i will look again tomarrow

my 90 f250 has it

Yes Your Ford has ABS its more then likely only Rear wheel ABS only. Look at the rear axle, look for a box looking bars its the 'sensor' its a piston that normally in age ceases.

My 86 though my 89 all have rear wheel ABS

My 90 f350 has abs. Rear only though. The light is on the right side of has next to the 4x4 light, in that black strip under the gauges. Like Johnny Diesel said the sensor on the rear axle is what goes out first.

well i put the dana 80 rear axle from my dodge under it since its a tougher axle i have no way of telling the dana 80 has a sensor on the diff but its electrical how well would the dodge sender work with the ford?