1949 Ford F1 question
- Thread starter millerliteliker
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millerliteliker
Junior Member
I am going down to 3.54. I think that should make a noticeable difference.
rotorwrench
Well-known member
Just a heads up, I went to the link and checked the info on that R&P set. It should have more info on there than it has. The smaller ring gears were generally set up on a smaller diameter carrier by Dana Spicer. I would want to know what diameter carrier that R&P set was made to fit (bolt circle diameter). If it is the smaller carrier, you would have to purchase one from Randy's R&P since I know of no other "New" part source but they are for Dana 44 and may not work in the 41. It may be made to fit the 3.73:1 carrier that is smaller than the 4.27:1 ratio carrier in the Dana 44 but I don't know about the Dana 41. The ring gear just has to be measured for the bolt circle diameter.
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Ross F-1
Well-known member
Can't say about the D41 being able to use the D44 carrier, I THINK it will work. I don't know if the ring gear bolt circle diameter varies with carriers, but it would make sense.
Here's the difference in Above and Below the 3.73 split on all D4x carriers
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rotorwrench
Well-known member
I checked my parts books and the truck book was not much help. The Mercury book was more specific however. You might be good to go according to it and the P/N in the truck book. The divining line was on the 4.55:1 ratio for the D41. The 3.73, 3.91, & 4.27:1 ratios all used the same carrier P/N 8M-4205-A when checking against the Mercury part numbers and the truck part numbers. The rear cover on the D41 was made for small carriers and the D44 rear cover was made for the larger ones. The Mercury cars, Ford wagons, Ford police cars, Ford sedan deliveries, and the F1 commercials all used the heavier Dana Spicer rear axles. The D44 was just a little more heavy duty than the D41 but shares a lot of internal parts. The case for the D44 is just a tiny bit bigger to accommodate more ratios. The Lincoln cars used an even heavier version of the Dana but they are very hard to find parts for.
With a pickup, I would prefer the 3.73:1 R&P so you could still easily pull a load. The taller gears will make it more difficult to do that. If you aren't planning on pulling a trailer or load the bed up very much, you might be OK.
With a pickup, I would prefer the 3.73:1 R&P so you could still easily pull a load. The taller gears will make it more difficult to do that. If you aren't planning on pulling a trailer or load the bed up very much, you might be OK.
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millerliteliker
Junior Member
I called Early Ford V8 before I ordered to make sure they would fit. They assured me that they would fit the Dana 41 with the 4.27 ratio. These guys have these made in Europe and are the only place that I know of that you can get these gears.
I don't intend the haul anything of any weight and I just wanted a low rpm at 65-70 mph.
I don't intend the haul anything of any weight and I just wanted a low rpm at 65-70 mph.
Just wondering how you got on fitting this 3.54 gearing (8C-4209-HS) to your Dana 41? Did the new crown wheel fit the exiting carrier? Any installation issues?
I have a Dana 41 that I am interested in changing to this gearing.
I see Early Ford V8 sales also have a ring and pinion installation kit (8C-4200-KIT) for the Dana 41. I haven't found anywhere else that offers parts for the Dana 44.
FortyNiner
Well-known member
Take a look at the offerings from Randy's: https://www.ringpinion.com
willowbilly3
Well-known member
I'd be interested to know how you got along setting it up. I've done quite a few Dana's and a few of them set right up with the old shims. Most needed shimmed for the correct contact pattern and that has it's own procedure which normally requires changing shimming under the bearings. I actually have the Snap-on puller set just for the carrier bearings but it doesn't have much to grab on and will generally destroy the shims. The easiest way is a set of sacrificial bearings (for the set up only) with this inside ground out a little so they easily slide on and off.
Also you have to shim in the bearing preload. I never had a case spreader, just wonked the carrier in with a big dead blow. But that method requires a feel only attained by experience.
Pinion preload is set with an inch/pound torque wrench
Also you have to shim in the bearing preload. I never had a case spreader, just wonked the carrier in with a big dead blow. But that method requires a feel only attained by experience.
Pinion preload is set with an inch/pound torque wrench
corvette8n
Well-known member
That is one clean/nice looking truck, how did you make out with yor ring gear swap?
Dick Webber
Senior Member
9=1949 or 50
H=6 cylinder 226
C=half ton
I had a 4.27 in mine. Got lucky and found a 3.73?from a 56 automatic F-100. Seems to be just right.
H=6 cylinder 226
C=half ton
I had a 4.27 in mine. Got lucky and found a 3.73?from a 56 automatic F-100. Seems to be just right.
In my earlier post that should have been 'I haven't been able to find parts for the Dana 41'. Thanks for the link to Randy's who has parts for the Dana 44.
I currently have a 3.73 Dana 44 from a '56 F100 in my '49 F1, but would like to put back my original Dana 41. I'm up for a set of tyres soon and am thinking of changing from my current 6:50-16 to 6:00-16. The 3.54 crown wheel and pinion (assuming it can all be made to work in the Dana 41) should keep the RPM in about the same place.
I currently have a 3.73 Dana 44 from a '56 F100 in my '49 F1, but would like to put back my original Dana 41. I'm up for a set of tyres soon and am thinking of changing from my current 6:50-16 to 6:00-16. The 3.54 crown wheel and pinion (assuming it can all be made to work in the Dana 41) should keep the RPM in about the same place.
Art Newland
Well-known member
I've only had my F1 for 3 months, but one of the things I noticed right away was the 9 inch diff. Anyone's that's been around any hot rods has seen a 9 inch! Mine has 3.70 ratio tag on it and by the way it drives I'd say that's correct. It has the non-syncro 4-speed and takes considerable clutch slipping to get her rolling while starting off in second. I don't think I'd want the ratio any higher. In looking around at it's install, it looks like it belongs there and I don't see any DIY hacking.
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