1952-53 rear end gears

[ole v8er]

I was wondering what the rear end ratios were used with overdrive and non overdrive cars? Also what about Fordomatics.

[donald1950]

i believe: OD is 4.11 nonOD is 3.73 auto should be 3.32 i have a 53 with OD and it was 4.11 and have sonce changed to a 8" with 3.50 and another car with an auto i think is 3.32 not much power in the car with the auto but the motor is quite tired.. station wagons had a different style differental and i believe they were 3.55

[Johnnydidd]

If I was to put AOD transmission in my 53 with 3 speed overdrive, would I have to change the gears in the rear end?

[RalphG]

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Reading from my Brooklands Road Test Mercury book I see they list 3.73 ratio for the standard, 4.10 overdrive and 3.31 Merco-matic for the 52 Mercurys.
For 1953 they have two options for each transmission choice. 3.90or 4.10 for standard trans., overdrive lists 4.10,3.90 and 3.54. Merco-matic 3.3 or optional 3.54.