1952 Fordomatic rear-end ratio?
 

I'm corresponding with a seller about the '52 Ford passenger-car axle he has for sale. He says it's from an original automatic car - what was available with the auto? My books are all packed away, but I seem to recall 3.73 was standard with something higher as an option?

Thanks for any help.

Re: 1952 Fordomatic rear-end ratio?
 

I think 3.73 is correct with automatic. 3.90 with standard and 4.11 with overdrive. Charles

Re: 1952 Fordomatic rear-end ratio?
 

Thanks!

Re: 1952 Fordomatic rear-end ratio?
 

The correct rear axle ratio for a Fordomatic Drive is 3:31. An optional ratio of 3:54 was available.

Re: 1952 Fordomatic rear-end ratio?
 

Well, that would be even better.

I wonder where I got 3.73?

Was there originally a tag with a code or some other way to tell without counting teeth or turns?

Re: 1952 Fordomatic rear-end ratio?
 

That's what mine is, too.

Re: 1952 Fordomatic rear-end ratio?
 

The 3:73 ratio was used for standard transmission cars.

Re: 1952 Fordomatic rear-end ratio?
 

Just FYI: My 53' Merc-O-Matic is a 3:54...but it was the end of the run of flatheads so maybe that is all they had left.

Re: 1952 Fordomatic rear-end ratio?
 

My Fordomatic rear is 3:31 ...nice cruiser!

Re: 1952 Fordomatic rear-end ratio?
 

Not really because it was end of run but because the convertible and the wagon weighed more and both used the 3:54

Re: 1952 Fordomatic rear-end ratio?
 

Good to know

Re: 1952 Fordomatic rear-end ratio?
 

just blew our rear axle in 52 with ford o matic. where do you find one to replace and what years fit?

Re: 1952 Fordomatic rear-end ratio?
 

David,

You never said if you're '52 is a V8 or 6 cyl. I think they may have used different ratio's.

Sal

Re: 1952 Fordomatic rear-end ratio?
 

Any52-56 rear should fit. Always check length and spring pad width.

Re: 1952 Fordomatic rear-end ratio?
 

found a Glenn Mitchell interchange manual (1961) that says Ford 52 to 54 and Merc 52-54 if you change out backing plates. V8 ratio 3:31

Re: 1952 Fordomatic rear-end ratio?
 

I believe Richardtx correct. Once researched and read that 3.31 was popular due to better pick-up, and that not many 6 cyl were sold with the matics due to lower power. Yet there's a few 6 owners out-there that love their cars.

There are a few matic owners that have/are converting to standard which is a significant undertaking. Maybe if you patient you'll get lucky and come across one.

Re: 1952 Fordomatic rear-end ratio?
 

Have a 51 Merc o matic rear for sale, $150, new brakes and drums.

Re: 1952 Fordomatic rear-end ratio?
 

i ave a 1953 with fordomatic and the tag on the differential says 3.54

Re: 1952 Fordomatic rear-end ratio?
 

3.31 is what all my books say for the 52 automatic equipped (Mercury). Seems to me mine has the number stamped into the axle housing. Thought I had a picture of it but can't find it now.

Re: 1952 Fordomatic rear-end ratio?
 

My 51 "Mercomatic" had a 3:07. That was in 1960. I can't say if it was factory installed or not. When I put a stick in it, it had to go. I had to downshift for every hill.