DIFFS SIZE CONFUSION ??? - Ford Powerstroke Diesel Forum
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Old 03-18-2009, 07:33 PM
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Exclamation DIFFS SIZE CONFUSION ???

Hello Everyone,

I searched....and searched. I cant find info on the stock Diffs.. FRONT & BACK.


My truck is a 99 f-250 super duty, reg cab, long box, 4x4, manual

I assume i got a tow package as i got a trans cooler...
I think I have 3.73's... as per ford... that is all they could tell me ???

I looked at the door tag, tried to find a VIN decoder, no tags or what so ever on the diffs ...the works...

i got people telling i got rockwells... sterlings... dana 40,60,70,80 ect...

Any help would really appreciated.
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Old 03-18-2009, 07:35 PM
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If you have f250, you have a sterling 10.5 rear end. I would need the door code to tell you the ratio.


The front end should be a dana 60.
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Old 03-18-2009, 07:36 PM
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Your rear axle is a 10.5 steerling rear end. THe front can be a dana 50 or 60. There is probably a tag on the diff cover that will give you info that a drivetrain shop can make usefull.
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Old 03-18-2009, 07:36 PM
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Quote:
Originally Posted by builtnotbought View Post
Hello Everyone,

I searched....and searched. I cant find info on the stock Diffs.. FRONT & BACK.


My truck is a 99 f-250 super duty, reg cab, long box, 4x4, manual

I assume i got a tow package as i got a trans cooler...
I think I have 3.73's... as per ford... that is all they could tell me ???

I looked at the door tag, tried to find a VIN decoder, no tags or what so ever on the diffs ...the works...

i got people telling i got rockwells... sterlings... dana 40,60,70,80 ect...

Any help would really appreciated.
should have sticker on front diff both of mine does
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Old 03-18-2009, 07:37 PM
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Originally Posted by Dirk View Post
If you have f250, you have a sterling 10.5 rear end. I would need the door code to tell you the ratio.


The front end should be a dana 60.
Cant the front be a 50? im pretty sure a read a petersons 4X4 magazine awhile back that said it can be either.
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Old 03-18-2009, 07:40 PM
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Most of the superduty's I've seen have d60's. The OBS f250's had d50's.
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Old 03-18-2009, 07:51 PM
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?? one is the front, the other is the rear. Both are fairly tough axles.
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Old 03-18-2009, 07:53 PM
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Exclamation

I believe the Dana 60 is 9.75"
Sterling is a 10.5" ring gear is just made by a different company and is roughly equivalent to Dana 70??

Right ?
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Old 03-18-2009, 07:54 PM
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No clue on that.
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Old 03-18-2009, 07:57 PM
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I do know that whoever told you that you have rockwell's... has never seen them.
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