Ok after my other post on the small & large wheel bolt pattern rotors not interchanging with spindles I now need to use the large spindles so I have only 1 size wheel pattern on the truck.


Thing is the large pattern spindles are on beams with frozen kingpins so they would have to be replaced. Not a big deal really but I would like to use the small pattern beams that are now cleaned, painted & mounted to the painted frame along with the coil springs.


In looking up kingpin parts I see them marked as power/non-power brakes and power & non-power steering. I don’t know about the steering side, both of my trucks have power steering. But the power & non-power brakes I can say. The small pattern is power & the large pattern is non-power.
I could not find pin sizes from 3 different sites so I don’t know the difference between the 2 kits listed?


Question, I plan on getting the non-power brake kingpin kit unless I should not for some reason. Using the large pattern spindles and the small pattern beams to make a new front suspension with large pattern rotors.See anything wrong with this as why it will not work?
Thanks
Dave ----

 

So no one has done kingpins on their truck to even know if the pins are same or different between power & non-power brakes and it is the bushings that may be different between the 2 kits?


I am going to try and get out to the garage today (got only 1 eye after Dr visit with drops & needle I have to get) to clean & start soaking the pins so fingers crossed that will not fight me too bad when I take them apart.
Dave ----

 

I have never had a f100. But I remember people in the know talking about it on here, and from what they have said, I believe you have found out the difference in the non-power and power brakes. I remember them saying a f100 with power brakes has the small pattern, a f100 with standard brakes has the large pattern wheel. And that jives with what you are staring at.

How about swapping rearends to make the patterns the same all the way around?

 

When beating on the kingpins today I did give that a thought.


2 things why I am not 100% on board with that.
#1 I don't have wheels that fit the small pattern. The ones that came on the parts truck are 14" and don't fit too well in the centers, it was just to get it to roll on/off my trailer. Have no money for other wheels for the project. Also the 15" that came on the project are after market type and I like them. I think even the tires are good enough to use.


#2 the small pattern rear has a different ratio, 2.47, than the large rear 2.75
Now if the speedo gears interchange maybe but I don't think they will. The 2.47 has Srod trany the 2.75 a T18 trany.
I have not even gotten under the parts truck (small pattern) to see if the speedo cables are on the same sides?


Just thought of #3 the rear brakes may be different sizes from a quick check I did on brake parts a few days ago. Think the small pattern has the smaller brakes?


Just wish I knew if using the non-power brake kingpins with the large pattern spindles {like they are now} and small pattern beams would all work together.
Then again maybe I should just use all the large pattern parts and rebuild them?


How come nothing is ever easy?
Dave ----

 

If it helps, My 1981 F 100 has the 5x5.5 wheels which are the 5 spoke aluminum types.

It has power brakes and king pins which are original and have never been replaced.

Not sure if it will help, but that is what mine has.

 

Do you know what the GVWR is of your truck, 4700 GVWR or 5100 GVWR?


I thought the non-power brakes and 4700 GVWR would be 5x5.5 wheels like mine now I don't know?
Thanks
Dave ----

 

Sorry if I confused the issue. Mine does have a 5000 GVWR with 2475 and 2904 front and
rear GVWRs.

 

ok the 5000 gvwr is what makes the 5x5.5 wheels.
Thanks for getting back on that weight.
Dave - - - -

 

Little more information to add to this mess:

With help from forum member Ultraranger (thanks) and his 77d isc brake swap to a 69 truck and me asking how he did it, he used the full 77 front suspension under the 69 truck.

But he sent me a link to a post of kingpin size https://www.ford-trucks.com/forums/1...-pin-size.html and information that member/moderator ctubutis posted it looks like there are 2 different pin sizes and they could be based on wheel bolt pattern size? Then member 80flareside posted the pins goby GVWR, small = 4700 GVWR and the 5000 = large. I do know that the GVWR has nothing to do with wheel pattern bolt size as both of my trucks are 4700 GVWR but 1 has power brakes (small) and the other non-power brakes (large).

So it gives me more to check if I can interchange spindles & beams but I have to get the large pattern spindles off the beams to either rebuild the large setup or interchange parts.


Dave ----