Rear axle
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Laughing Gas
Joined: Mar 2016
Posts: 757
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From: Cheyenne, Wy
Rear axle
From the 97-02 f150 5 lug rear. What was the lowest gear ratio available (3.50, 3.73, 4.10....) in 4x4? Would prefer the 4.10 is possible. Would a VIN character tell this ratio (which character) or do I need to read the white sticker for this information. What are the different axle codes for these trucks? I do not want to climb under each vehicle at the jy to look. Wanting to swap this into a 2000 Expedition. Looking to go to larger tires and swapping axles should be less expensive than a gear change. I hope.
What about changing the front diff? Is that more of a remove/replace bolt in?
Thanks for your help.
What about changing the front diff? Is that more of a remove/replace bolt in?
Thanks for your help.
Fleet Mechanic
Joined: Jul 2019
Posts: 1,317
Likes: 314
I’m not sure across the entire generation spread, but I believe 3.73s are the lowest you find. 4.10s came with the 7700# trucks, at least late in the run.
Axle codes would be listed in the door jamb, as well as the tag in the axle, if still present.
Doing what you want, just find aftermarket gears. 4.30s, I guess, depending on your upsize.
Axle codes would be listed in the door jamb, as well as the tag in the axle, if still present.
Doing what you want, just find aftermarket gears. 4.30s, I guess, depending on your upsize.
Laughing Gas
Joined: Jul 2017
Posts: 1,204
Likes: 513
Also take note of the wheel stud size as there was a diameter change at some point. Also a possible pinion bearing upgrade in 2002-2003. Went through this on my 2003 a few years ago: Identifying Rear End by Axle Tag - Ford F150 Forum - Community of Ford Truck Fans
All-inclusive VIN Codes from another F-150 forum including axle: Complete Identification codes. - Page 2 - Ford F150 Forum - Community of Ford Truck Fans
All-inclusive VIN Codes from another F-150 forum including axle: Complete Identification codes. - Page 2 - Ford F150 Forum - Community of Ford Truck Fans
Cargo Master
Joined: Dec 2015
Posts: 2,920
Likes: 515
From the 97-02 f150 5 lug rear. What was the lowest gear ratio available (3.50, 3.73, 4.10....) in 4x4? Would prefer the 4.10 is possible. Would a VIN character tell this ratio (which character) or do I need to read the white sticker for this information. What are the different axle codes for these trucks? I do not want to climb under each vehicle at the jy to look. Wanting to swap this into a 2000 Expedition. Looking to go to larger tires and swapping axles should be less expensive than a gear change. I hope.
What about changing the front diff? Is that more of a remove/replace bolt in?
Thanks for your help.
What about changing the front diff? Is that more of a remove/replace bolt in?
Thanks for your help.
https://www.ford-trucks.com/forums/1...hift-fork.html
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