When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Ok. So I've made a mistake. I've been taking pictures along the way, but I just realized that I don't know which side of my axle was driver and which side was passenger.
It is the original straight axle (55 f100), and as near as I can tell, it is the same on both ends.
Is there a way to tell front from back or driver from passenger? I've got top v bottom nailed
The angle of the king pins vs the spring perch is not 90 degrees.
With the spring perch (where the spring sits on the axle) perfectly flat (0 degrees) the king pins should tilt back slightly. Thus giving it a positive caster angle.
It's not much, 2 degrees.
The angle of this picture makes it look wrong, but it isn't:
Last edited by EffieTrucker; 11-18-2015 at 05:31 PM.
Reason: Added picture
The angle of the king pins vs the spring perch is not 90 degrees.
With the spring perch (where the spring sits on the axle) perfectly flat (0 degrees) the king pins should tilt back slightly. Thus giving it a positive caster angle.
It's not much, 2 degrees.
The angle of this picture makes it look wrong, but it isn't:
Excellent information! My measurement tools aren't helping me work it out yet, but I've been wanting an upgrade there. I'm sure I can get it. Thanks!
Ok. Spent the last 45 minutes with a angle measure wheel, torpedo level, level on my phone to set the spring perch at 0 degrees and then measure the angle of the kingpin (placing kingpin through axel and then measuring angle of the portion that sticks out from axel).
Probably due to the quality of my tools, I am not able to get measurements that make it definitively obvious to me, but I did get consistent enough readings to make a guess. I then started examining the axel for any sort of indication that might confirm my guess. I only found one difference, highlighted in the pictures below.
Anyone who might be able to confirm my guess, offer additional thoughts on how I can further confirm my guess (or who may be able to for me)... much appreciated.
Basically, the only difference I see is in the casting stamps on both ends. There is one on either side. The casting is the same EXCEPT the character closest to the kingpin. On one end it is a "J" that is upside down (turned 180 degrees) and on the other end it is a "7".
My measurements (crude though they may be) led me to determine that the side with the turned "J" is front. So that casting would be on the front of the passenger side, while the casting with the 7 is on the back of the drivers side.
well, that would certainly explain why I couldn't consistently measure an angle on the kingpin. Adding two that a couple of pictures I just dug seem to indicate that I've found a more definitive answer, and my guess was completely wrong....
One side is clearly the driver side (drag link present), and I'm not seeing a cast stamp on the front of the axle.... in the second pic is clearly the passenger side (no drag link) and there is an obvious cast number on the front of the axle.... It looks like the "7" noted in my last note is in that stamp... So that would mean that the "7" casting was on the front of my axle on the passenger side, before I took it apart
On my axle the number where mirrored, so they where on the same place front and back but mirrored.. ie always right rear or left front ( or if it was the other way around....
My axle also had the part number on both sides too. So to identify front/back on my 50 (may be different on 55?), the hole for the locking pin on the king pin is beveled; or it is larger on one side and the pin will only go in correctly on one side and cannot go all the way through. That make sense? The larger side goes to the front, and the pin when installed is nearly flush... Hope that helps
My axle also had the part number on both sides too. So to identify front/back on my 50 (may be different on 55?), the hole for the locking pin on the king pin is beveled; or it is larger on one side and the pin will only go in correctly on one side and cannot go all the way through. That make sense? The larger side goes to the front, and the pin when installed is nearly flush... Hope that helps
Well, how about that! Holes looked to be the same size, but if I actually try to insert pins, they do only go in one way... Pretty cool. Confirmed my latest conclusion. Great stuff!
My axle also had the part number on both sides too. So to identify front/back on my 50 (may be different on 55?), the hole for the locking pin on the king pin is beveled; or it is larger on one side and the pin will only go in correctly on one side and cannot go all the way through. That make sense? The larger side goes to the front, and the pin when installed is nearly flush... Hope that helps
I'm about a year from the first drive. So only know how it rolls in/out of the garage; which is great!
I have no idea what the difference is, could prob call sta and see?
Man that tire is really good looking but the sidewall to thread pattern doesn´t at all look the same on the 670-15 tires thats almost completley smooth......bummer
the 700-15 looks abit closer to yours......
750-17 isnt that abit to large to fit on our trucks. What about draglink to tire clearence??
11-18-2015, 04:11 PM
)
. So only know how it rolls in/out of the garage; which is great!