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Old 12-27-2005, 10:38 PM
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Model A axel spindle swaps

I have what I was told was a model A ,dropped front straight axel.that has been drilled and has home made radius rod brackets.It measures apprx.50" from king pin to king pin.the spindles and drums on it are mechanical brakes.Iv'e picked up another complete axle drum to drum hydraulic brakes that I believe is a 48-50's ford.It looks like I could just swap the complete spindles and drums and put them on the drilled dropped axle?But from what Iv'e read, "they" whoever they are ,says to use 37-48 spindles and 49 to56 backing plates.I have the king pin out of the drilled axel and is 3/4 " diameter.The other axle king pin I haven't gotten out yet but looks to be maybe a little larger.Is this why I need the 37 -48 spindles,or can the axle be drilled to accept slight larger king pin?Any help Thanks Tom

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Old 12-29-2005, 10:26 PM
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Quote:
Originally Posted by whatwouldscoobydo
I have what I was told was a model A ,dropped front straight axel.that has been drilled and has home made radius rod brackets.It measures apprx.50" from king pin to king pin.Iv'e picked up another complete axle drum to drum hydraulic brakes that I believe is a 48-50's ford.But from what Iv'e read, "they" whoever they are ,says to use 37-48 spindles and 49 to56 backing plates.
Model A axles are not 50 wide...kingpin to kingpin....and Ford discontinued straight axles in 1948 under cars.

The suggested " Hot Setup " back in the day was 37 to 41 ( round back ) spindles or 42 to 48 ( square back ) spindles. With 53 to 56 Ford F-100 brakes. I prefer the 42 to 48 spindles because the 53 to 56 F-100 backing plates have a square recess for the mounting area. You also have to grind some on the 37 - 41 spindles to get the 53 to 56 F-100 backing plates to fit.

http://www.flatheadv8.org/f1brakes1.htm

Click on the above link for a more details and part numbers

DEUCE...
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Old 01-01-2006, 09:04 PM
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I'm going for the old school,rat rod style and won't be running any fenders so I hope the drilled axle will work.The king pins in it are about 3/4". I'll have to find out the size of the king pins for the 37-48 spindles and go from there.Thanks Deuce for the help, Tom
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Old 01-02-2006, 02:46 PM
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I just recently fixed up the backing plates (48) to fit onto the Model A spindle which will accept the 41-48 drums. I machined a filler for the big hole in the backing plate, welded it in and the milled in the holes to bolt to the smaller diameter patern of the Model A spindle. This set up is going on a Model A pick up that will have the original 4 banger and driven at A Model speeds.

Trees
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