Pre-Power Stroke Diesel (7.3L IDI & 6.9L)Diesel Topics Only
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When you look at the numbers the second line gives the relevant information.
The 3 or 4 will be under the bolt head, and if the tag is in good enough shape you should be able to make out either a . or L to the left of the first two numbers.
. indicates open axle, .10 in your case
L indicates limited slip, L10 in your case.
10 would be 4.10 ratio
55 would be 3.55 ratio
Next three numbers 10 2 is 10.25" 97 and older with a 6.5" x 8 bolt circle
10 5 would be a 10.5" after 99 and have 170 mm x 8 bolt circle
86 F250 HD 6.9 IDI ATS turbo "not exactly" stock 4x4 T19 BW1345 3.55LS both ends D60 front, 10.25" Sterling rear, ram air, dual stacks.
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