Can't ID rear axle in 89 F Super Duty
#1
Can't ID rear axle in 89 F Super Duty
I'm having trouble with Iding the axle that is in my 1989 F Super Duty dump truck. Truck has a 7.3 diesel, zf5-42 5 speed, 19.5" rear duals, with 16" front tires. Rear end is 3rd member type, not the typical dana 80 found in these trucks. I had to actually bring the rear calipers, pads and rotors in to the auto parts store so they could find the correct parts as parts are not listed. Brake parts are from 1 ton Chevy dually.
#2
I can't help you any with the identity of that axle, but I did notice how those u-bolts are not setting square with the axle. That is putting stress in places it shouldn't and is not safe. You might think about finding an axle that fits, or if you really like that one at least moving the spring perches. I don't want to see you wrapped around a tree cause your truck came apart!
#3
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Thanks for the concern on the U bolts, I had to look at them again, but all is fine. For some reason the picture makes them look crooked.
Also thanks for the axle info. It is a Rockwell C103 after looking at other info. I was thinking a Dana from later F550s but didn't make sense. The Ford dealer couldn't help me much since Ford stop supporting these. From what they said it was a rare option.
Also thanks for the axle info. It is a Rockwell C103 after looking at other info. I was thinking a Dana from later F550s but didn't make sense. The Ford dealer couldn't help me much since Ford stop supporting these. From what they said it was a rare option.
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#9
Thanks for the concern on the U bolts, I had to look at them again, but all is fine. For some reason the picture makes them look crooked.
Also thanks for the axle info. It is a Rockwell C103 after looking at other info. I was thinking a Dana from later F550s but didn't make sense. The Ford dealer couldn't help me much since Ford stop supporting these. From what they said it was a rare option.
Also thanks for the axle info. It is a Rockwell C103 after looking at other info. I was thinking a Dana from later F550s but didn't make sense. The Ford dealer couldn't help me much since Ford stop supporting these. From what they said it was a rare option.
Easiest way to tell is axle code on door jam sticker
#10
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What is the weight class on that truck, I have a 90 f-550 10lug with the c130, it's a bullet proof rear end why change it? The millitary uses the rockwell's in the duece and a half's, they make lockers and electric lockers for them, look for a bones yard that specializes in the old trucks, I know there out there but cant remember the name, you can buy wholesale. I would dump a Dana 80 in a minute for a rockwell.
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What is the weight class on that truck, I have a 90 f-550 10lug with the c130, it's a bullet proof rear end why change it? The millitary uses the rockwell's in the duece and a half's, they make lockers and electric lockers for them, look for a bones yard that specializes in the old trucks, I know there out there but cant remember the name, you can buy wholesale. I would dump a Dana 80 in a minute for a rockwell.
well you could make a couple decent arguments i suppose for changing it.
1.if the poster in #3 is correct about gear ratio options of 5.83 & 6.17 .......who needs that? lmao.the dana 80 options of 4.63 & 5.13 were more than enough (or bad enough,depending on how you look at it.)
2.the dana 80 was oem to the truck.
3.so you can have matching wheels/tires to the front.i was recently informed how pricey the 19.5 tires are.
not sure i would bother swapping it out or not.rear gear ratio,how much the truck is used and current tire condition depending i suppose.
and like Brad says,please do look at the door jam stickers axle code and post it for us if you don't mind.
dana 80's:
axle code 72 = 4.63
axle code 73 = 5.13
#12
Here were most of the available C103 ratios. I personally have never seen a fast ratio C103. Maybe they were put in some of the later models, and I've replaced a boatload of these in class A motorhomes due to heat or cracked housings.
There should be a tag just above the pinion and a tag(or two) on the right rear axle housing as to the pertinents of the particular unit.
3.70, 4.10, 4.11, 4.33, 4.56...Fast Ratio
5.13, 5.29, 5.38, 5.83, 5.86, 6.14, 6.20, 6.80, 7.20...Standard Ratio
David 7.3, What does your door tag read under Axle?. Didn't realize that Ford had an F-550 in 1990. I thought that they were all F-Superduty.
Just some random vehicles that I've seen these...
1986 P-Chassis motorhome
1998 P-Chassis mini bus
1972 C-40 Cab Chassis
First production of the C3500HD (gas only)
Some UPS trucks
I''ve never seen one of these in any Ford(not say that they don't exist). An easy way to tell without getting under the truck is to look at the hub. If it has a dust cap it's a C103, if it has an axle flange, its something else. I'm sure that there are other slight variants such as maybe being an A63 but very unlikely.
I'm basing this info on experiences. I've been told that there were some in the F500/F600 back in the 50's/60's but I haven't seen those either.
These rears have been out of production for a while now and parts are very expensive and hard to find.
Very interesting discussion guys...
There should be a tag just above the pinion and a tag(or two) on the right rear axle housing as to the pertinents of the particular unit.
3.70, 4.10, 4.11, 4.33, 4.56...Fast Ratio
5.13, 5.29, 5.38, 5.83, 5.86, 6.14, 6.20, 6.80, 7.20...Standard Ratio
David 7.3, What does your door tag read under Axle?. Didn't realize that Ford had an F-550 in 1990. I thought that they were all F-Superduty.
Just some random vehicles that I've seen these...
1986 P-Chassis motorhome
1998 P-Chassis mini bus
1972 C-40 Cab Chassis
First production of the C3500HD (gas only)
Some UPS trucks
I''ve never seen one of these in any Ford(not say that they don't exist). An easy way to tell without getting under the truck is to look at the hub. If it has a dust cap it's a C103, if it has an axle flange, its something else. I'm sure that there are other slight variants such as maybe being an A63 but very unlikely.
I'm basing this info on experiences. I've been told that there were some in the F500/F600 back in the 50's/60's but I haven't seen those either.
These rears have been out of production for a while now and parts are very expensive and hard to find.
Very interesting discussion guys...
#13
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