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I need to get the column out of my '76 F250, AT/PB. I have the wheel off and it's a little hard to see under the power brake unit. I'm wondering what the right procedure is; does it come out through the cab or through the engine compartment? Does the rubber seal at the firewall need to be removed, or can I loosen the clamp on the column and slide it out? And does the power brake unit need to be removed or can it be worked around? It looks to me like all that holds it in are the two bolts at the steering box, the rubber seal, and the bracket under the dash.
On my 4x4 there was a bolt that went through a clamp at the end of the steering column under the booster. Take the nut off the bolt and slide the bolt out. Also while your under there disconect the tranny linkage either at the tranny or if you can pop it out of the plastic washer thing on the column. Then go and take out the five or so bolts holding the rubber seal onto the firewall inside. Make sure all the wireing is unhooked and take the out the two bolts holding the column to the dash and pull. The shaft that connects the column to the steering box should fall off and all you have to do is pull it through the hole in the firewall. With the tranny linkage on there it will be kinda tricky but it will come out. When you put it back in to adjust the tranny linkage all you have to do is get the column all bolted in exept the linkage. And assuming the tranny is still in park, make sure the column is in the park position and slide the linkage onto the stud and tighten the nut.
I have had steering columns in my 76 F100 2wd in and out a couple of times. The first time I was converting from non-power steering 3sp column shift to P/S auto. Then the shift mechanism broke in the collar and I replaced with another. My recollections are: The column comes out the cab. Disconnect the shift linkage (unless you have floor shift), Disconnect the wiring harness and nuetral safety switch connector at the base of the column near you brake pedal, bracket under dash, several (6?) bolts at the weather seal. I've seen some trucks where the bolts (to the weather seal) are on the inside of the cab, and others in the engine compartment. You may have to peak under carpet or rubber mat to see these, and then the two bolts to the steering box. Pull out the driver door. BTW I have an older truck (69) that had a terrible turn signal switch. I bought an after market replacement that made this like new. The same rack that had the 69 style also had 73-79 type. It was fairly easy to install. If you have a bad switch you don't have to live with it. Good Luck