Axle data please
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Trailering
Joined: Mar 2022
Posts: 22
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Axle data please
I have a on f350 cclb with a 7.3 4x4 no door tag or axle number but my Vin is 1FTSW31F62EC53230
Axle tag v423b
Axle tag v423b
Last edited by Bsick1985; Mar 9, 2022 at 08:31 PM.
Laughing Gas
Joined: Oct 2014
Posts: 962
Likes: 114
From: Middle TN
This link will help you for Ford vehicles produced before 2008.
How do I find the Axle Ratio and Limited Slip?
How do I find the Axle Ratio and Limited Slip?
Super Moderator
Joined: Apr 2004
Posts: 34,503
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Click on your VIN and you will go to a decoder. Click again for the decode, and on page 2 or 3 it says 3.73s for gearing.
Not sure that's right, but otherwise, you will have to crawl under and look for numbers stamped into the housing, driver side front. They may also be a tag on the diff on the back side on one of the cover bolts.
Not sure that's right, but otherwise, you will have to crawl under and look for numbers stamped into the housing, driver side front. They may also be a tag on the diff on the back side on one of the cover bolts.
Hotshot
Joined: Jan 2004
Posts: 19,763
Likes: 1,081
From: St Louis
Neither of the previous posts are going to help you since the door tag is missing and the axle information is not encoded in the VIN making any "decoder" will be useless. The decoder will simply give the standard equipment info which may or may not apply to any specific truck.
You'll have to do it the old-fashioned way. Jack up the rear end, put it in neutral, and count the ratio of driveshaft rotations to a wheel rotation. To see if it's an LS or open differential, compare the direction of the rotation of the wheel opposite the one you rotate. Same direction = LS, opposite direction - open diff.
You'll have to do it the old-fashioned way. Jack up the rear end, put it in neutral, and count the ratio of driveshaft rotations to a wheel rotation. To see if it's an LS or open differential, compare the direction of the rotation of the wheel opposite the one you rotate. Same direction = LS, opposite direction - open diff.
Cargo Master
Joined: Dec 2015
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I've never had great luck counting -- it can be difficult to know you went EXACTLY one revolution of pinion and the difference between, say, 3.55 and 3.73 is negligible (although I think your options for a 7.3 truck are 3.55 or 4.10)
I prefer to just pull the diff cover -- the ring gear will be stamped with two numbers separated by a space. One is number of pinion teeth, the other number of ring gear teeth. Divide one into the other and you'll get a result of a common ratio.
If you have a 4wd and the front tag is present you can assume the rear is the same if nothing goes boom in 4wd in a straight line.....
I prefer to just pull the diff cover -- the ring gear will be stamped with two numbers separated by a space. One is number of pinion teeth, the other number of ring gear teeth. Divide one into the other and you'll get a result of a common ratio.
If you have a 4wd and the front tag is present you can assume the rear is the same if nothing goes boom in 4wd in a straight line.....
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