55 T-Bird axle ratio

You might already know, but the ratios for 55 Birds are as follows:

3 speed 3.73 (410 optional?)
3 speed O/D 3.92
Automatic 3.31

If you have an open (non-posi) rear, then mark the
yoke and ONE tire (keep the other tire from
rotating) and turn the ONE tire two full turns while
counting the revolutions the yoke rotates-this is
your ratio

Simply put, positraction, you turn both tires one full turn, non positraction, turn one tire two full turns.

54 Victoria 312; 48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

Author	Message
paul2748	Posted 6 Years Ago
Supercharged Group: Forum Members Last Active: Yesterday Posts: 3.6K, Visits: 497.1K	You might already know, but the ratios for 55 Birds are as follows: 3 speed 3.73 (410 optional?) 3 speed O/D 3.92 Automatic 3.31 If you have an open (non-posi) rear, then mark the yoke and ONE tire (keep the other tire from rotating) and turn the ONE tire two full turns while counting the revolutions the yoke rotates-this is your ratio Simply put, positraction, you turn both tires one full turn, non positraction, turn one tire two full turns. 54 Victoria 312; 48 Ford Conv 302, 56 Bird 312 Forever Ford Midland Park, NJ
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Vic Correnti	Posted 6 Years Ago
Supercharged Group: Forum Members Last Active: 5 days ago Posts: 345, Visits: 12.1K	Rotate a tire and count the number of drive shaft revolutions. Vic Correnti
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312YBlock	Posted 6 Years Ago
Supercharged Group: Forum Members Last Active: Last Year Posts: 217, Visits: 57.3K	How can I determine the axel ratio of my 1955 T-Bird? The axel shaft has - 03029A. 44-1 on it. 1955 312 T-Bird Warwick, NY
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55 T-Bird axle ratio

55 T-Bird axle ratio

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