Ring & Pinion Set 49-50 Wagon 3.54 ratio 49-50 Mercury 3.54 ratio 48-50 F-1 3.54 ratio Part# 8C-4209 In Stock Years covered: 1948 1949 1950 C&G Ford Parts will this do the trick
That should be it. I would do some research on though. I would double check and confirm part numbers and ID on what they offer and what you have. I would have a good shop install a ring set, especially on that axle. I mentioned the spreader earlier. There are some special tools required to change the gear set. Jeep and 4X4 off road shops may can help with this. The Dana 44 was used for years. How it compares to the earlier 41s and 44s, I'm not sure? You would think they would be similar. Will you be able to tell the difference in going from 3.73 to 3.54? Absolutely. Will it be the improvement you expect? Probably not. I had a 1963 F250 with a 292, T98 4 speed and a Dana 60 with 4.56 gears. That truck had tall tires but they were not that tall. It loved 50-55. It could go faster than that but that's where it wanted to run. That truck was a man and it was a blast to drive. I would check and make sure I did not have a problem with the engine and drive lane as mentioned earlier. I would also check the present ratio by the rear tire . Mark the drive shaft and tire and confirm it is close to 3.73 just to satisfy my curiosity. Sometimes things are stamped wrong or have been changed.
The hp draw from the Dana 41 vs the 9inch would be very marginal. 9inch rears were behind 223 sixes so I don't see big differences there.
all depends on where ya running it, use 3.00 in the ICTs 9in and been all over with it Blown Flattie, around 2400 at 70, pull a trailer with it up and down central cal with no problems course I ain't climbing the rockies either.........but have been to Bonny and Washington and Oregon without any troubles..............
Ok guys thanks for all your input,, I am going with the 9 inch , when I change power train if I do I will be already set up in the rear end , I will have the shop do it. The only thing im not sure about is the gear ratio, my 9 inch has 3.00 in it now ,way to tall. im thinkin around between 3.08 and 3.54 ,from floor to top of tire is 28 1/2 inch with a 3 speed tranny and a flathead 8 . Its all about engine comfort at 55 mph just for taking my dear old dad out for a drive ,thanks
I've driven at 55 MPH with my stock 3.73 axle many times, no issue. Its the gears in the stock tranny that sound like they want to launch into orbit more than the engine (as I believe was mentioned above) I'd recommend staying 3.25-3.50 for ratio. I actually posted on your Facebook inquiry on the 48-52 Truck page too. The 9" has the benefit of wider brakes and self adjusting brakes too. The ring and pinion cost for the Dana 41 is outrageous in my opinion.
just wonder what that amounts to in rpm 3.73 2800 rpm at 50 im guessing here 3.50 rpm at 50 3.25 rpm at 50
Use this. Closest you will get to solving your query without doing it in real life https://www.randysworldwide.com/calculators/rpm/
https://spicerparts.com/calculators/engine-rpm-calculator This one worked for me.... 3.73 Roughly 2161 Rpm with a 29" tire at 50. 2199 with a 28.5 tire. 3078 @70
If you are running 2800 at 50 it's a much lower gear than a 3.73. If that's your rpm it's at least a 4.56 or your clutch is slipping badly.
The Jalopy Journal
