King Pin or Not???
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Post Fiend
Joined: Jan 2001
Posts: 5,121
Likes: 1
From: Springfield, VA
King Pin or Not???
Here's the deal. I have a 72 F-100 Dana 44 front axle under my 95 F-150 that has been converted to disk brakes using the Chebby style spindle, backing plates and calipers (head scratcher ain't it? 
). My question is about the king pins that are in this axle. I am too busy and too darned lazy to change out the king pins in this front (especially after spending quite a while on getting the axle in the truck in the first place). The shop has called me today and asked if I am sure that this is a 72 front axle. The donor truck was a 72 F-100 (I still have the rest of the truck and ran the VIN again, 72 it is), they say that all of their parts suppliers insist that it should have ball joints and not king pins 
. I have checked around myself and the local Pep Boys, AutoZone and NAPA all say that 72 F-100's have ball joints. I know that this is garbage as this axle really appeared to be the stock axle in the truck. I am sure that it is king pins as the spindles have a cap on top with 4 bolts holding it in, plus when I removed the caps I could see the pins and extremely worn out bushings. Does anyone know what the part numbers are for the repair kits is and what axle this might be? I assume 72, but could it be a leftover 71 D44?
). My question is about the king pins that are in this axle. I am too busy and too darned lazy to change out the king pins in this front (especially after spending quite a while on getting the axle in the truck in the first place). The shop has called me today and asked if I am sure that this is a 72 front axle. The donor truck was a 72 F-100 (I still have the rest of the truck and ran the VIN again, 72 it is), they say that all of their parts suppliers insist that it should have ball joints and not king pins . I have checked around myself and the local Pep Boys, AutoZone and NAPA all say that 72 F-100's have ball joints. I know that this is garbage as this axle really appeared to be the stock axle in the truck. I am sure that it is king pins as the spindles have a cap on top with 4 bolts holding it in, plus when I removed the caps I could see the pins and extremely worn out bushings. Does anyone know what the part numbers are for the repair kits is and what axle this might be? I assume 72, but could it be a leftover 71 D44?
Senior User
Joined: Oct 2003
Posts: 480
Likes: 1
From: Elyria, Ohio
King bolts
You should have king pins, aka king bolts. aka spindle bolts. My 79 F100 is using king bolts. I went to Autozone and Napa websites and looked up part for 1972 axle for F100. There are king bolts listed in both stores with either nylon or metal bushings. So clerks must be offering opinions instead of looking it up. There were no ball joints listed. These trucks are 1 1/2 times older than most of the people working in these stores. Go to website; look up what you want, print it out, and take it to the store and ask for that part; don't let them offer an opinion. It works and they don't like it and sometimes you still have to get a manager for proper help. Good shopping.
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Post Fiend
Joined: Jan 2001
Posts: 5,121
Likes: 1
From: Springfield, VA
I did find the part number for king bolts, however when cross referenced by the manufacturer, those numbers are for 2wd F-100. I spoke with Ford yesterday and they asked that I get the BOM for the axle. When I find the darn things, I am buying 2 sets just to kep a spare handy!!
Thanks for all the help!!
Thanks for all the help!!
Post Fiend
Joined: Jun 2002
Posts: 13,873
Likes: 3
From: Atlanta GA
What makes you think the bolts are gone (really pins) and just not the bearings?
If you check the 67-72 forum on the subject and the NAPA numbers needed for bearings and seals, I think you will be all set.
On my 71, which might be older, my kingpins are part of the cap/plate and the only reason I needed them was because the plate was broken. The bearings had worn, the kingpins had not. My truck has probably 214k miles and had run 33s for quite a while.
The bearings sit inside the knuckle and cushion the kingpin. You align it by placing shims under the plate. There are no bushings for the kingpin.
If you check the 67-72 forum on the subject and the NAPA numbers needed for bearings and seals, I think you will be all set.
On my 71, which might be older, my kingpins are part of the cap/plate and the only reason I needed them was because the plate was broken. The bearings had worn, the kingpins had not. My truck has probably 214k miles and had run 33s for quite a while.
The bearings sit inside the knuckle and cushion the kingpin. You align it by placing shims under the plate. There are no bushings for the kingpin.
Last edited by rebocardo; Nov 19, 2003 at 06:51 PM.
Senior User
Joined: Oct 2003
Posts: 480
Likes: 1
From: Elyria, Ohio
king bolts
king bolt sets include the bolts; bushings to press into spindle at top and bottom, a bearing to set under axle and take load and shims to set below the bearing and take up vertical space. The bearing takes the vertical load during turning. The bushings in the spindle are what the wheels turn on horizontally left and right. This all predate ball joints. If bushings wear through; then king bolts are next. When you grease the king bolt you are forcing grease between the king bolt and the bushing in the axle spindle. The king bolt is held firmly by a small bolt through the axle. I have replaced these in 1931 Model A, 1948 Ford, and 1979 F100 PU. Bushings are either nylon or metal. The metal type will have to be honed or reamed to size; but are preferred to nylon for length of service. However if you don't maintain them with grease neither bushing will last. This axle you have may be from a 1979, but sounds like it is not from F100. F150 4WD ? shows same king bolts used as F100 2WD.
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Post Fiend
Joined: Jan 2001
Posts: 5,121
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From: Springfield, VA
Now it all makes sense. I keep the same pin, and just replace the bearings and bushings. So knowing that, I should be able to buy the kit for a 2wd and just use the bearings and bushings?
I think I am finally getting the picturen now.. Duh
I think I am finally getting the picturen now.. Duh
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