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I need a left hand front spindle for 1973 F250, 6900 GVWR, dual piston brakes, without 460 (it's a 390).
Does a 1972 F250 6900 GVWR w/o 460 spindle interchange?
Evidence:
1973 parts catalog 30.2E indicates this is D2TZ 3106-B (marked D2TA 3108-DA and #5). I confirm my spindle is marked D2TA3108. No idea what "and #5" is supposed to mean.
1972 parts catalog 30.2F (for F250 6900 GVWR dual piston without 460) says LH spindle part number is D2TZ 3106-B (note, exactly the same as 1973 30.2E) and "stamped D2TA 3108-DA & #5" (again, same as 1973 30.2E).
However!... 1973 parts catalog 30.2F and 1972 parts catalog 30.2J (for F350) ALSO identifies D2TZ 3106-A (marked D2TA 3108-DA and #4). I know the F350 uses a different size kingpin, but according to this the spindles appears to be MARKED the same? What does "and #4" vs "and #5" mean? This isn't on the spindle itself. Just from the markings visible on the parts it would seem you can't tell these apart!
So I have located a 1972 LH spindle that according to the seller will fit 1973 F250 6900 GVWR w/o 460... but if they're going exclusively by the MARKED ID numbers, it appears you cannot tell the 1972/1973 F250 6900 GVWR from the F350 (or even from the F250 7500 GVWR or F250 6900 GVWR w/ 460, for that matter!). They're all apparently marked the same.
So how does one tell these spindles apart, visually?
Sorry, looks like you said the #4 / #5 refers to parts diagram pages? I'm still trying to figure out how to tell the difference from stamped numbers whether the part you're looking at is F350 vs F250?
Sorry to question you on this... but I don't think #4/#5 is the page number. On 1964-72 illustration book, for 1970/72 F250 it's page #7 in section 30.
Two charts, one application and the other parts list.
The way I read it, they are the same.
But that determination is up to you.
Yeah, I read it the same. Except that I know the F350 spindle uses a different kingpin, and yet the part number is exactly the same? So clearly, just the way we read it seems to be missing something. That's why I'm asking for help.
I know nothing about your part number or cross reference dilemma
But
The length of the king pins is what differs
That does change the knuckle configuration too
Just between trucks and vans last I knew
replaced a whole lot of sets of king pins over the years and had to replace a few knuckles
Parts were ALLWAYS a problem even at a dealer when the parts weren't obsolete yet
A good wrecking yard should have an old Printed INterchange book.
Also a phone call to Dyna-Trac or another business that deals with differential / axle assembly builds like WFO in California, may give you some answers.
WFO is in either Auburn or Grass Valley up in the Sierra Nevada mountains supplying parts for gobs of vehicles traversing the famous Rubicon Jeep Trail.
Comparing dimensions of bearings used both inner and outer, may give you an indication of differences.
As a For-instance, I am running '86 Chevy 2500 series knuckles, spindles and brakes on a '79 Ford Dana 44 front axle housing on my '78 E250 4x4 conversion.
I like the disc brake calipers that GM used on the Dana 44's.
Why not install a late model complete Ford Superduty front axle assembly from a recycle yard, or a Craigslist ad.
SO I think I found the answer to the original question... e.g. What is the significance of the notation "and #4" or "and #5" in the parts listings?
In a photo of a part sent to me from a possible seller, I suddenly realized I could see what looked like a "5" STAMPED (not cast) into the part.
So I went back and really scrubbed up my own spindles, and I finally found THIS:
Unless I knew I was looking for that I'd never have noted it. Even getting the picture required JUST the right angle of light. And, just to compare, I went and grabbed the Right hand spindle... There it is!
What I now suspect (but cannot prove without getting an F350 spindle in hand and measuring) is that the F250 "D2TA3108 & #5" spindle and the F350 "D2TA3108 & #4" spindles might be the exact same CAST part, but are then bored to two different kingpin sizes and stamped with a 5 or a 4 to identify.
Anyone with a 72 or 73 F350 spindle (or an F250 w/ 460, or an F250 crew cab?) who might be able to see if it has a "4" stamped into it?
