Please help me figure out my axle specs - Ford Powerstroke Diesel Forum
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Old 09-04-2010, 08:30 AM
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Please help me figure out my Early '99 axle specs

Door code is D1. Need to figure out what the axle is, and what the real manufacturer weight rating is (as opposed to the Ford rating on the door sticker). any help is greatly appreciated

Last edited by samiam; 09-05-2010 at 08:53 AM.
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Old 09-04-2010, 01:39 PM
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What truck is this? and Look at the ID tag on the rear differential.
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Old 09-04-2010, 01:44 PM
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D1 - 3.73, limited slip (F-350), single rear wheels

thats all that comes up
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Old 09-04-2010, 07:47 PM
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Thanks. I've got as far as 3.73, but what i'm looking for is the actual manufacturer weight rating for the axle. i'm trying to figure out what it is, i.e. Dana 60. free floating axle, etc.
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Old 09-04-2010, 08:16 PM
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Ford 10.25 & 10.50-Inch Axle Tips - Axle Examination
Fact: This axle received a larger ring gear, which improved its overall strength and addressed the premature failure issues of the 10.25-inch axles when used with 4.10:1 or numerically higher gear ratios. Unfortunately, it was designed with a smaller pinion bearing than its predecessor.
Found under: '99-'05 F-250 and F-350
Type: Full-float
Weight (lb., approx): 333 (single wheel), 348 (dual wheel)
Ring gear diameter (in.): 10.50
Pinion shaft length (in.): 10.50
Pinion shaft spline count: 31
Axleshaft spline count: 35
Axleshaft diameter (in.): 1.5 (at the splines)
Hypoid offset (in.): 1.50
Gear ratio range: 3.08-7.17
Brakes: Disc
Normal GAW range (lb.): 9,750 (single/dual wheel)
Nominal GCW rating (lb.): 26,000 (single/dual wheel)
Output torque maximum (lb-ft): 10,660 (single/dual wheel)
Output torque continuous (lb-ft): 2,900
Weak points: This axle uses an inner bearing and race that is not as large and strong as the bearing and race used in the 10.25-inch axle. Also, the ring gear is mounted to the carrier using bolts that are non-shouldered and tend to loosen, resulting in the possibility of catastrophic damage to the differential. This is actually a problem that affects both the 10.25- and 10.50-inch Sterling axles.
Fixes: To address the bearing and race issue, you can use the ring-and-pinion from the 2nd-generation 10.25-inch. The trade-off is that you'll get a slightly weaker ring-and-pinion, but you'll get a larger inner bearing and race. To solve the ring-gear bolt problem, replace all of the bolts with shouldered bolts. The technicians at Custom Differentials can set you up with shouldered Dana 70 ring-gear bolts.
Hot tips: If you're short on cash during a rebuild (depending on the ratio you want to use, factory parts for the 10.50-inch Sterling can be almost double the cost of 10.25-inch aftermarket parts), you can use the 2nd-generation 10.25-inch case/carrier and gearset in the 10.50-inch housing (as mentioned above). This can significantly lower your parts bill. Also, a three-spider case/carrier is available instead of a normal two-spider gear case/carrier. This update increases the strength and longevity of the differential because the third-spider gear helps share the load when delivering power to the tires and helps reduce spider-gear wear and failure.

Ford 10.25 & 10.50-Inch Axle Tips - Sterling 1050 - Four Wheeler Magazine



The Sterling 10.5 axle is an automotive axle manufactured by Visteon and is used solely by Ford. It was first used in model year 1985 Ford trucks. The axle was developed to replace the Dana 60 and Dana 70. The Sterling 10.5 axle is currently only made as a full floating axle.



Sterling 10.5 axle - Wikipedia, the free encyclopedia
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Old 09-04-2010, 08:34 PM
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Good info J-Rod.
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Old 09-04-2010, 10:32 PM
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well that was some good info! thanks.
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Old 09-05-2010, 08:12 AM
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one more question... since i have an early 99 truck, built July 1998, how can i tell if i got the "old" sterling or the newer sterling. looks like there's a couple thousand pounds of GAW rating.

here's the link to the earlier axle found under model years 93-98.
http://www.fourwheeler.com/techartic..._upgrades.html

and a bonus question: my door sticker shows "XB" as the spring code. I am trying to figure out what they are rated at for max load.

Last edited by samiam; 09-05-2010 at 10:23 AM.
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Old 09-09-2010, 05:48 AM
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hijacked my own thread, but... anyone have an explanation of the "B" in "XB" for my spring code? I've found a few random mentions in threads that it's @ 5500 pounds, but nothing firm.

Quote:
Originally Posted by samiam View Post
one more question... since i have an early 99 truck, built July 1998, how can i tell if i got the "old" sterling or the newer sterling. looks like there's a couple thousand pounds of GAW rating.

here's the link to the earlier axle found under model years 93-98.
Ford 10.25 & 10.50-Inch Axle Tips - Sterling 10.25 Upgrades - Four Wheeler Magazine

and a bonus question: my door sticker shows "XB" as the spring code. I am trying to figure out what they are rated at for max load.
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Old 12-11-2011, 04:57 PM
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Quote:
Originally Posted by Jarrod B View Post
Ford 10.25 & 10.50-Inch Axle Tips - Axle Examination
'99-'05 F-250 and F-350

Weight (lb., approx): 333 (single wheel), 348 (dual wheel)
a bump for axle weight.
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