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why they dont make a 37-40 spindle, with a dropped steering arms with threaded caliper bungs

Discussion in 'Off Topic Hot Rods & Customs' started by nobby, Mar 20, 2025.

  1. nobby
    Joined: Jan 8, 2006
    Posts: 1,347

    nobby
    Member

    set up for a off the shelf rotor - -be it the 70-77 gm version- -or a mustang 2 stub for the 75 granada rotor
    to take a modern twin pot caliper
    with double eys each side
    you know just the one piece
    no seperate sweat on spaer
    no seperate dropped arm
    no seperate caliper adaptor

    fo if you added up the parts in total
    200 spindles
    50 spacers
    200 steering arms
    150 caliper adaptors

    must have double eyes for rhd and lhd

    stiffen the steering arm to the spindle with teh caliper carrier material to boot

    like that gnrs winner

    gives you the option of running a handed pair of vented and slotted rotors than
    and ford 4.5

    drop them 2'' over stock for
    make 1/2'' dropped tie rod ends
     
  2. Malcolm
    Joined: Feb 9, 2006
    Posts: 8,144

    Malcolm
    Member
    from Nebraska

    My guess is just not a big enough market to justify the cost of engineering and manufacturing.
     
    Fordors likes this.
  3. gene-koning
    Joined: Oct 28, 2016
    Posts: 4,927

    gene-koning
    Member

    Sounds like a great plan. Why don't you start building them?

    Might want to do a little market research to determine how many you might sell, and at what price they may sell at.
    Then you can do the designing, do the required machining, do the sourcing of the special critical pieces, do the testing, and test fit your designed produce on several examples of the body design you expect to sell your product for. Then all you need to do is find a government official to sign off that the finished product will be safe for on the road use. Once the production process is declared, set up, and make sure it functions correctly is completed and can actually make a product that looks and functions like the one you designed, you can establish the selling price, set up a distribution process, do some advertising, and wait for the sales orders to come in. Then all you have to do is deal with the customers and payment processes.

    How soon do you plan to be selling your new parts?
     
  4. nobby
    Joined: Jan 8, 2006
    Posts: 1,347

    nobby
    Member

    yes, I know what you mean,
    It would be better to start with a later model rotor like that of the 1999 -2010 ford ranger or 2wd explorer
    combined hub and rotor 4.5'' and use its twin pot caliper
    as it has the tone ring pressed on already and an aperture for a speed sensoruse the stock dust guard
    plus tyou cpould simply borrow long term the spindle part as it appears peressed in
    Front Right Steering Knuckle for FORD EXPLORER RANGER 1998-2009 ZZP/FR/023A | eBay
    run the stock twin pot caliper - -combined carrier
    the forging would be quite flat then if the spindle is pressed in

    use all the stock parts
    back plate
    caliper
    rotor
    bearings

    then if you ran a rear axle with the same brakes, you could use the master and it be all the same - -you know 2000 up ranger 8.8

    literally set it up on a so-cal 48'' wide axle with the 36.5'' perch - -the drop of the steering arms for using a stock 35/6 wishbone - -just 2'' from stock
    dial it all in for a 112 inch wheel base with the stock track
    you could literally sell them for the price of
    a pair of spindles
    a pair of stereing arms
    a pair of brake caliper hangers
    the bearing adaptor
    at least 500 us dollars a pair

    Brake Discs + Brake Pads Front For FORD EXPLORER 1995 - 2001 2WD | eBay

    might help in the longer term, when for example
    you run abs
    or the 10 speed automatic transmission needs a speed signal from the wheels
    you may not need to run older transmissions ,
    just a though
    the likes of that big brake company could then do a kit for the ranger/explorer carrier.


    it would be great.
     
    Last edited: Mar 24, 2025 at 8:09 AM
  5. nobby
    Joined: Jan 8, 2006
    Posts: 1,347

    nobby
    Member

  6. nobby
    Joined: Jan 8, 2006
    Posts: 1,347

    nobby
    Member

  7. nobby
    Joined: Jan 8, 2006
    Posts: 1,347

    nobby
    Member

    yes, so if indeed people are taking mustang 2 ifs off of if you like
    33 34 fords 35-40's
    in favor of a trad dropped axle,
    shirley, there are people here on this board with talent in the cad
    could do it
    and 3d print one or a pair

    2000 FORD EXPLORER 4.0L V6 OHV Rotor | RockAuto
    rwd rotor under ten bucks
    2000 FORD EXPLORER 4.0L V6 OHV Caliper | RockAuto
    caliper 35 bucks
    2000 FORD EXPLORER 4.0L V6 OHV Brake Pad | RockAuto
    pads 6 bucks
    2000 FORD EXPLORER 4.0L V6 OHV ABS Wheel Speed Sensor | RockAuto
    you know when you need the speed sensor to change up the auto trans

    2000 FORD EXPLORER 4.0L V6 OHV Knuckle | RockAuto
    2wd knuckle50


    37-40 ford spindle
    steering arm dropped 2'' from stock
    double eyes both sides
    stub axle ranger / explorer 2wd 1998-2010
    tone ring - speed sensor
    11.30 rotor
    twin piston caliper
    stock dust sheild


    everyone doing a straight axle race car would want them
    would be the go to disc brake for anyone not wanting oem drums

    go as far to use the longer later king pins
     
    Last edited: Mar 24, 2025 at 8:20 AM
  8. Ned Ludd
    Joined: May 15, 2009
    Posts: 5,335

    Ned Ludd
    Member

    If we're talking small-run technology a modular approach makes sense. That's the opposite of an everything-built-in approach. It also allows different variants of each module, including ones by third party manufacturers. If a hot rod aftermarket industry is to survive it'll have to embrace that open-ended mindset.

    A lot of manufacturers are using bolt-on spindles these days. As much as I despise that sealed-unit, non-repairable engineering philosophy it has its uses. There is an intermediate technology, however: bolt-on spindles which take separate bearings and hubs. There are many options among rear spindles on fwd cars, but the most useful for the present purpose must be the AMC bolt-on front spindle. They are being reproduced, having found a following in some forms of motorsport. They even share a bearing spec (Timken SET2/SET6) with a huge number of other cars, making all kinds of hubs viable.

    Forging is extremely capital-intensive. I'm not sure what additive manufacturing technologies have been coming close to matching forgings for strength, and I'm not sure what kind of surface finishes they allow.
     
  9. nobby
    Joined: Jan 8, 2006
    Posts: 1,347

    nobby
    Member

    where is the picture of the 36 ford gnrs winners front spindle?
    even though its was push pull and not cross steering
    i think that was milled 5 axis
    ?

    anyways, when IF there are at least TEN reason why, then it might be worth considering
    1. run the 6'' longer king pin
    2. already drop the steering arms 2'' over stock 37-40
    3. speed sensors / tone rings, that can be read by the my2000 year ford eec-V stock ecu's - -olpening up the use of canbus controlled ecu's and the like of later motors
    4. tone rings - vss's for the use of abs
    5. dual piston calipers with a larger but skinnier friction surface, with maybe differing sized pistrons to aid the shudder or flutter of brake actuation
    6. delete the use of bearing spacers/ adaptors
    7. delete the bolt on caliper carrier. - -it still uses a carrier
    8. stiffenn the steering arm with the lugs for the caliper carrier.
    9. short hat combined rotor 11.30'' allows adding space to attain geometry perfection (if that is your bag)
    10, you could make the steering arms shorter - -if you wanted to , if you were pas or elastic, = smaller steering wheels
    11. press in stub axle already exists - -someone in the world makes them.
    12. its a one stop shop
    13. off the peg dust sheilds
    14. the calipers were always intended for that rotor.
    15. 4.5'' pcd ford, with 1/2'' unf studs.

    you jump from 1978 to 2000.

    can you do the cad cam?
    how many people on here can do it?
     
    Last edited: Mar 24, 2025 at 8:34 AM
  10. mustangsix
    Joined: Mar 7, 2005
    Posts: 1,456

    mustangsix
    Member

  11. RodStRace
    Joined: Dec 7, 2007
    Posts: 6,669

    RodStRace
    Member

    @nobby I am so happy that this wasn't a "I want this exact special part" post, but instead a well thought out discussion starter with the parameters laid out.
    Of course most special parts are narrow in focus and as soon as you set the exact features in stone, someone wants a change for this or that.
    Add to that the issue with manufacturing something that is traditionally a forged part so any change to that very expensive and specialized process is going to garner concerns, especially with the wide variety of weight and forces in use (cruising highboy to single digit drag times to fat fender rough road carver).

    I applaud you for choosing much more recent parts as a basis. Service life being measured in decades on many rods, you want stuff that will still be available in 2035.
    I'd dig deeper and try to find that unicorn, a standard of center register size, hub to rotor offset and a few different diameters so the end user could choose from 15 inch wheels (small rotor and caliper - lightweight) to 14 inch rotors (big wheels, heavy use). Unfortunately that spoils caliper pin location, unless there are small and large calipers that all have the same radial caliper spacing like motorcycles are moving toward.
    https://ridermagazine.com/2019/04/02/tech-qa-radial-vs-axial-brakes/
     
  12. nobby
    Joined: Jan 8, 2006
    Posts: 1,347

    nobby
    Member

    i think what i mean is
    Screenshot 2025-03-24 220621.png Screenshot 2025-03-24 220635.png
    the 2000 up ranger explorer 2wd knuckle has a pressed in spindle - -stub axle
    press that out - -5 axis machine a 1.5 inch thick steel flat stock part
    with the king pin nubs and the bouble eye dropped steering arms on the caliper side where it says 'R'
    Screenshot 2025-03-24 220445.png
    the discs are 11.30 ''i bet they would go in a 15 inch steel wheel
    4.5'' ford.
    tone rings etc etc 7 bucks each

    Screenshot 2025-03-24 220533.png
    lots of friction material
    Screenshot 2025-03-24 220506.png
    the stock caliper carrier = =l

    one stop shop
    double eys rhd
    steering arms have a bit of web strength added to lower caliper mount hole

    just a thought
    stock dust guards you cannot seem to get though.

    machine it flat
    press in the stub axle
    no extra bolt on steering arms - already drop them and beef them up
    no sweat on bearing adaptor

    all that
    and a tone ring vss
    plus the hat or hub is really quite shallow
    so you can add to dial in geometeryer
    run a 6'' king pin


    i would pay 500 bucks for a pair
     
    Deutscher likes this.

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