Hot Rods DROP AXEL,.. HOW HARD COULD IT BE???

Ha ha, fair point! I failed to clock that! All I saw was the rather wide looking spacing between the spindle and the spring boss.

Chris

 

Stretch drop is the way to go if you want to retain the mechanical brakes.

 

Yep.

 

Nobby's 36 ford pickup project - 27 April 2024 part 4 - YouTube
erm,
These are the two forged axles you can get from the sc-cal
layed about a stock 36 axle

the drilled axle has 34'' perch and 2 1/4 boss - 47.25 to pins
the other is stock 36.5 perch and 2'' boss 48 to king pins

the drilled 47.25 axle has a 1/2 inch more drop than the 48
IF you use the 48 axle with stock 1940 model78 spindles and a split 35/6 2'' perch bone you will only need drop the steering arms 2'' - - if you use the 47.25 axle they will need to be 2.5'' dropped
they do not make bolt on arms for either or

THE REASON the perch distance is narrower on them is so you have more clearance clarence to the split boner or hairpins
spring then needed 29.25

Iam of the opinion that the 47.25 34 perch axle with a 4.5''' 16'' wheel and a 4.5'' tyre and tube with the real tall sidewall will give you turning circle issues if running a split bone or hairpins a 46 inch wide axle with a 29 inch tall tyre might be problematic

Nobby's 1936 ford pickup project sat 18th jan 2025 vid 3

erm this one shows the 48'' king pin axle with stock pre 36 perch 36.5'' - here I need not worry about the tire hitting the bone as its stock and oot the way.
the drop relative to a stock 36 is 2 3/4 the steering arms dropped 2''
a stock 1937-8-9 40 tie rod can be used uncut, just wind them in 1/4 each side.
stock drag link
stock 6.3'' pitman arm, 1971 pontiac pitman 1 1/8 sector with the early ford 1.5 inches per foot earaly ford taper already in it.
14 to one ratio guts in the jeep cherokee steering box saginaw 800 - jeep uses long arms to clear the solid front 4wd axle stuff - so it needs to be fast.
1985 jeep cherokee saginaw 800 also found in cj's
note here the jeeps steering set up is similar to ealry cross steer - over if you like a pantographic idler system.
they are metric m16 and m18 on the hydro but still 7/16 unc on the mounting bolts

the rotors are 70-77 chevy - i think the hub is similar to 40 ford

the wheels are 6 by 16 vintique gennie - -so 7'' wide to the outer rim, or where you would measure the back splash of 3 .75 inches - or in real terms they have a 1/4'' positive offset or if you visualise the ccentre line of the wheel, the wheels are sitting 1/4'' further inboard from the hub

if i would have fit the shock shackle at the bone it would hit.

the tyres a 195 75 16 commercial van tyres £20 each fitted puncture repaired.

IF using stock 40 spindles or model 78 spindles, the ey have a divut in them for the spindle stops,
when i fitted stock stops to this the tyre hit the frame
I could switch on volaire rotors, widening the track 1/2 inch each side
the track is 57 3/4 - tyres centre lines
hub to hub its 58 1/4 - 58 3/4 with volaire rotors - ish
rear axle is 59.25 8''
the rear wheels are 7's - so half inch wider each way

note the difference in the bones 36 to 40 - -they are the same spring i think and the shackle angle differs slightly - this can only be the position of the eye in the bone - -or maybe there is a slight difference in stock 36.5 to this axles perch- it goes in 1/16 or something out

the spindle stop nuts in the shiney are available in two lengths and they are longer than the stock ones

erm just for reference - - that is a 31,25 inch long inner shaft from borgeson - chevy 1957 chevy pas conversion inner shaft, its 36 spline on the bottom, outer tube is 1 3/4 - -it a limeworks 3'' drop column drop - well its not really a drop then.... a 16'' wheel, the column is in the stock loaction so I can use the stock pedals - -now IF you have a 37 pickup, it will be different as the dash is different ALSO 1938 pickup, will be different too, so it will only kind of work in a 36 pickup liek that

food for though.
or I WISH
someone had put up info like this years ago and I wouldn't have
1. bought 15'' wheels
2. bought the 47.25 axle
3. cleaned up the 40 bone and axle that was in it
4. wasted sooo much time
5. bought a 33'' column

'just' as an aside
IF I were doing it all again
I would take a heavy 36 axle
narrow it from 50.5 to 48
which would entail dropping it 2 3/4