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08-30-2017, 03:15 AM | #1 |
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Differentiel gear ratio change?
Hello everybody
Some guy told me that the gearbox ratio from a 28-29 model A rear end is different then a 30-31? Is this true? Best regards Philips M. |
08-30-2017, 04:06 AM | #2 |
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Re: Differentiel gear ratio change?
My 1928 has the stock 3.70 to 1 ratio, and most all of the 1929 -1931 cars would have the stock 3.78 to 1 ratio.
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08-30-2017, 07:31 AM | #3 |
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Re: Differentiel gear ratio change?
When I was young people said that the roadsters and phaetons had the 354 rear in them. Is that true? Jack
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08-30-2017, 11:44 AM | #4 |
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Re: Differentiel gear ratio change?
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08-30-2017, 01:53 PM | #5 |
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Re: Differentiel gear ratio change?
The the 3.70 is a very slightly higher gear than the 3.78 so you will go very (and I mean very) slightly quicker with the 3.78 ratio.
John in dark rainy Suffolk County England . |
08-30-2017, 03:12 PM | #6 |
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Re: Differentiel gear ratio change?
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08-30-2017, 04:27 PM | #7 | |
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Re: Differentiel gear ratio change?
Quote:
I have a rear end with a 4.11 R&P in it. Someday if I get to build my hill climb car that's going in it.
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08-30-2017, 06:22 PM | #8 | |
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Re: Differentiel gear ratio change?
Quote:
Vince Falter's site says that 3.54's were Post 1934 and available in the AfterMarket for A and B Models. Not sure what year they came out in Aftermarket. Read about it here: http://www.fordgarage.com/pages/rearaxleratios.htm Last edited by Benson; 08-30-2017 at 06:58 PM. |
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08-30-2017, 07:06 PM | #9 | |
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Re: Differentiel gear ratio change?
Quote:
Right or wrong, this gear set works well in a light roadster...it does seem to go nicely. Last edited by hardtimes; 08-30-2017 at 07:08 PM. Reason: ..... |
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08-30-2017, 08:43 PM | #10 |
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Re: Differentiel gear ratio change?
I have a 29 Special Coupe that pinion nuts came loose. When I took it apart I found it had 4.11 gear set in it. I ordered a 3.54 gear set with new bearings and seals and never looked back, great cruise speed at 50 to 55 mph and I have been 65 mph with out straining the engine.
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08-30-2017, 09:55 PM | #11 |
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Re: Differentiel gear ratio change?
You NEVER know what "someone" put in these OLD cars! Some people even have "UPGRADED" body parts & pieces!---I have 1999 Stents & 2001 Titanium Screws & a rod from 1981!
Bill Heinz
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08-30-2017, 10:15 PM | #12 |
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Re: Differentiel gear ratio change?
To make a car feel more peppy/sporty, you would install a LOWER gear ratio, not a higher one.
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08-30-2017, 11:17 PM | #13 |
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Re: Differentiel gear ratio change?
I don't know this to be true but have always heard that the 29 Model A was the fastest of the 4 years of production.
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08-31-2017, 10:48 AM | #14 | |
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Re: Differentiel gear ratio change?
Quote:
I've also heard that the '32 V-8 was the FASTEST V-8, because of some SNEAKY Cam they used, for 1 year only???--I "think" I heard it was a STEEL cam???? Bill Racer
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"THE ASSISTANT GURU OF STUFF" Last edited by BILL WILLIAMSON; 08-31-2017 at 12:05 PM. |
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