The Ford Barn

RKS.PA · 10-25-2017, 12:39 PM

The only numbers I can find on my differential are a 3 and a 2 on the flange where the tork tube connects to the differential. Do you think this means I have a 3.25?

Thanks very much.....Dick.

revkev6 · 10-25-2017, 12:41 PM

Quote:

Originally Posted by RKS.PA

The only numbers I can find on my differential are a 3 and a 2 on the flange where the tork tube connects to the differential. Do you think this means I have a 3.25?

Thanks very much.....Dick.

nope, should be something else stamped in there. the stamps relate to the number of teeth on the ring and pinion gears. I don't think you have a two and a three tooth gear!

1942deluxe · 10-25-2017, 01:30 PM

Probably 3.78 but 3.54 I think was an option. 3.54 was standard in 1946.

revkev6 · 10-25-2017, 02:08 PM

Quote:

Originally Posted by 1942deluxe

Probably 3.78 but 3.54 I think was an option. 3.54 was standard in 1946.

guess I'll be checking the rear I pulled out of the 46 I parted out this summer

Kurt in NJ · 10-25-2017, 05:10 PM

I had a 46, and parted out 3 others, all had 3:78

1942deluxe · 10-26-2017, 07:55 AM

Sponsored Links (Register now to hide all advertisements)

I think the Early Ford V8 club 1941-48 book references this subject. I think they got complaints about the cars didn't have as much "launch" off the line and went back to
the 3.78's in 1947. Back in 1995 Ford made a 3.31 standard on a F150 with the 5.0 automatic for improved fuel economy. I sold about 5 of them and had probably 4 out of 5 complaining they were shifting out of overdrive on every hill. Learned to spend the $50 to put 3.55's in them. In 1996 I think they went back to 3.55's. The more things change the more they don't!

10-25-2017, 12:39 PM	#1
RKS.PA Senior Member Join Date: Jun 2010 Location: Marana, AZ Posts: 1,194	1947 Super Deluxe Rear-end Ratio The only numbers I can find on my differential are a 3 and a 2 on the flange where the tork tube connects to the differential. Do you think this means I have a 3.25? Thanks very much.....Dick.

10-25-2017, 01:30 PM	#3
1942deluxe Senior Member Join Date: Jan 2011 Location: Albion, PA Posts: 711	Re: 1947 Super Deluxe Rear-end Ratio Probably 3.78 but 3.54 I think was an option. 3.54 was standard in 1946.

10-25-2017, 05:10 PM	#5
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: 1947 Super Deluxe Rear-end Ratio I had a 46, and parted out 3 others, all had 3:78

10-26-2017, 07:55 AM	#6
1942deluxe Senior Member Join Date: Jan 2011 Location: Albion, PA Posts: 711	Re: 1947 Super Deluxe Rear-end Ratio Sponsored Links (Register now to hide all advertisements) I think the Early Ford V8 club 1941-48 book references this subject. I think they got complaints about the cars didn't have as much "launch" off the line and went back to the 3.78's in 1947. Back in 1995 Ford made a 3.31 standard on a F150 with the 5.0 automatic for improved fuel economy. I sold about 5 of them and had probably 4 out of 5 complaining they were shifting out of overdrive on every hill. Learned to spend the $50 to put 3.55's in them. In 1996 I think they went back to 3.55's. The more things change the more they don't!