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1935-1948 Ford/Mercury High Speed Ring and Pinion Gear Set, 3.25 Gear

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Specs
Sold in Quantity:
Set
Ratio:
3.25
1935-1948 Ford/Mercury High Speed Ring and Pinion Gear Set, 3.25 Gear

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Please note the following about this product:

  • This item is sold as a set.

Details

Reviews (7)

Q & A (3)

What's in the Box

Info

These fit 1935-1948 passenger cars or 1935-1941 Ford 1/2 ton pickups (not 3/4 ton or larger). All gear sets are direct replacements for stock, non-quickchange Ford banjo rear axles. 6-spline input.

  • Fits 1935-48 Passenger Cars or 1935-41 Ford 1/2 ton pickups
  • Does not fit 3/4 ton or larger
  • Stock (non-quick change)
  • All gear sets are direct replacements
  • Six spline input
  • 3.25:1 gear ratio

Installation Instructions (PDF)

Customer Reviews

Rated 4.9 out of 5 by 7 reviewers.
RATING BREAKDOWN
7 reviews
5 Stars
6
4 Stars
1
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

Larry
Verified Purchaser
Verified Reviewer
McFarland, Wis

Can now cruise.

November 04, 2016
Changing to the 3.25 gears was great. I can now cruise on the highway without the engine screaming Away.
Yes, I recommend this product.
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Warden
Tomah, WI 54660, USA

Works perfect

November 07, 2013
Installed this gear set in a completely stock 85 HP 1937 ford two door sedan several moths ago. In Wi. we have lots of hills and valleys this gear works just fine if its driving on the interstate at 65 MPH or country roads at 55 MPH. Pulls very good at low speeds in third gear thru towns and runs about 2,400 Rpm on the interstate at 65 with 29 inch rear tires. Install was not difficult and it was changed out in less than a weekend.
Pros:
  • everything fit
Yes, I recommend this product.
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Jf10yd
Verified Purchaser
Harrisburg, SD 57032, USA

for the last 20 years I have collected a

November 17, 2012
We wanted our 36 Ford Carbolet to run a little better on the highway for road rallies. I called Speedway and theysaid the 3:25 was the right gearing. We had a 4:11 and Ford at one time offered a 3:27. So we put one in the car. Since then we have equiped over 6 of our Fords with the 3:25. The gearing is just right for the flat head V-8. If you have 48 Ford or earlier and want to drive on the highway atabout 60 MPH the 3:25 is your gear. Joe Floyd
Pros:
  • the right gear ratio
  • put new seals and barings as the same time
  • it takes some work to put in.
Yes, I recommend this product.
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Sid-28 Roadster
Verified Purchaser
Pueblo, Colorado

Great Quality Gearing

April 01, 2012
The quality of these gears is outstanding,much better than I expected. They must be computer generated. The bearing fits were exact except for the outboard fit on the pinion shaft. The bearing on this fit must be able to slip (snug slip fit) so you can adjust the preload on this double bearing. I had to chuck the pinion shaft in my lathe and very carefully remove 0.0015" with a piece of fine emery cloth. The results of this gear change (From 3.78:1 to 3.25:1) have made a great difference in the "roadability" of my flathead powered, 28 Model A High-Boy roadster. The RPMs have dropped from 65MPH @ 3000RPM to 65MPH @ 2600RPM.
Yes, I recommend this product.
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Sid-28 Roadster
Verified Purchaser
Pueblo, Colorado

Great Quality Gearing

April 01, 2012
The quality of these gears is outstanding,much better than I expected. They must be computer generated. The bearing fits were exact except for the outboard fit on the pinion shaft. The bearing on this fit must be able to slip (snug slip fit) so you can adjust the preload on this double bearing. I had to chuck the pinion shaft in my lathe and very carefully remove 0.0015" with a piece of fine emery cloth. The results of this gear change (From 3.78:1 to 3.25:1) have made a great difference in the "roadability" of my flathead powered, 28 Model A High-Boy roadster. The RPMs have dropped from 65MPH @ 3000RPM to 65MPH @ 2600RPM.
Yes, I recommend this product.
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Steve
Verified Purchaser
mays Landing New Jersey

I would buy again

April 10, 2011
installed like you said . So far everything I brought for my 46 food has proformed like I expeced it too
Pros:
  • En't had chance too try
Yes, I recommend this product.
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Steve
Verified Purchaser
mays Landing New Jersey

I would buy again

April 10, 2011
installed like you said . So far everything I brought for my 46 food has proformed like I expeced it too
Pros:
  • En't had chance too try
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

3 questions : 5 answers

1 answers

Does this come with instructions on installing the pinion? I have replaced a broken axle, but have never done anything to the pinion.

BuckeyeBob
Columbus, OH, USA
December 21, 2014

Does this come with instructions on installing the pinion? I have replaced a broken axle, but have never done anything to the pinion.

Answers

December 22, 2014
EricM
These do come with installation instructions. You can view them here: http://static.speedwaymotors.com/pdf/919-107F.pdf
3 answers

I am interested in this high speed rear gear set. I am looking for info/advice on what gear ratio to select. 3.25 to 1, 3.54, 3.78, 5.86, 6.17??? What would be the result of each one? I have a 40 Ford PU tranny behind a 46-48 Merc Flathead in a 32 Ford Se

Roark
Tempe, AZ
December 06, 2011

I am interested in this high speed rear gear set. I am looking for info/advice on what gear ratio to select. 3.25 to 1, 3.54, 3.78, 5.86, 6.17??? What would be the result of each one? I have a 40 Ford PU tranny behind a 46-48 Merc Flathead in a 32 Ford Se

Answers

November 08, 2013
Warden
Use the 3.25 for high speed driving. The 3.54,378,5.86 and 6.11 increase the rpm of the engine while driving much more than the 3.25. I have installed the 3.25 gears in a stock 37 ford and they work fine
November 18, 2012
Jf10yd
Trust me the 3:25 is the right gear. go higher and you loose the low speed acceleration.
December 07, 2011
John
Part number 919107F Choosing the correct gear ratio requires some research for best choice. Roads and terrain in which you drive, (flat, hilly, freeway, etc.), tire diameter, and desired rpm range for most commonly driven speed. An easy way to compute these factors is to visit this website. http://users.erals.com/srweiss/calcrpm.htm which is Stan Weiss Calculator. Enter in the most common traveled speed and the other information and it will calculate the rpm at that speed.
1 answers

Will these gears work in a 1947 Ford truck 1/2 ton. Kind of confusing with the title.

47Ford
August 14, 2016

Will these gears work in a 1947 Ford truck 1/2 ton. Kind of confusing with the title.

Answers

August 17, 2016
John
Expert
We apologize but these gears only go thru 41 on the half ton pickups and you will need to contact Motive gear for the later series of pickup ring and pinion sets.
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