09-30-2012, 07:59 PM | #1 |
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1950 f1 rear
Just got a 50 f1 and trying to figure out what rear it has. there is a tag on it that has W 51 over 13 on it. 51/13 does that mean anything. the only other markings are pat. #. THANKS.
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09-30-2012, 08:25 PM | #2 |
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Re: 1950 f1 rear
Divide the 13 into 54 and you get 3.92 which is the gear ratio of the rear end. I have read that 1951 Merc rears were also used in the early 1950's Ford pick-ups. Specifically, the 1951 Merc rear was a Dana 44 and was offered with the 3.92 option. So, your rear may be a Dana 44. Very strong rear. If possible , please post a phto of it. Here's a photo of a 1951 Merc rear. The inside dia. of the drums is 11 in. Bolt pattern is 5 x 5 1/2. The width of the rear from WMS to WMS is 61 1/4 in. Click on photo to enlarge. Here is a posting that the rear may be a Dana 41.
http://www.jalopyjournal.com/forum/s...d.php?t=326549 Also be sure and read this info. http://www.ford-trucks.com/forums/89...rear-diff.html Last edited by 19Fordy; 09-30-2012 at 08:42 PM. |
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09-30-2012, 08:31 PM | #3 |
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Re: 1950 f1 rear
THat's the same exact rear in my 50 F-1 in your pic. Mine has the 3.92 gear.
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09-30-2012, 08:37 PM | #4 |
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Re: 1950 f1 rear
See if it has this "44" on the rear housing.
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09-30-2012, 09:00 PM | #5 |
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Re: 1950 f1 rear
Thanks, I will check tomorrow for the 44
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09-30-2012, 09:30 PM | #6 |
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Re: 1950 f1 rear
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09-30-2012, 09:49 PM | #7 | |
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Re: 1950 f1 rear
Quote:
Not for those models. ASSUMING that it is indeed a Dana 44 and is the original rear end, I am kind of surprised. The Dana 44's with the 3.92 weren't really used until 51-52. |
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09-30-2012, 11:40 PM | #8 |
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Re: 1950 f1 rear
49 Mercury and 49 F-1 rear ends appear identical except for the spring brackets which are on top of the housing on the F-1 and under the housing on the Merc. My Merc has the 3.91 gear without overdrive. My F-1 has a 3.73 which is about right for the 6 cylinder.
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10-01-2012, 07:53 AM | #9 | |
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Re: 1950 f1 rear
Quote:
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10-01-2012, 09:22 AM | #10 |
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Re: 1950 f1 rear
I checked the rear housing and there is a 41 on it, and the plate in the glooove box has model 9rc and the serial number on it.
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10-01-2012, 09:36 AM | #11 | |
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Re: 1950 f1 rear
Quote:
The "9RC" is just the model number they used (you'll see that a lot on the titles to these trucks). If the serial number is 98RC______, that means it was a half-ton F-1 with a flathead eight cylinder. |
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10-01-2012, 09:45 AM | #12 |
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Re: 1950 f1 rear
I'd like to pick up a 3.9 rear for an F1 at a reasonable price some where near Vermont. Foe a future project. I have a 51 Merc rear with 3.23?? now.
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04-14-2014, 10:45 AM | #13 |
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Re: 1950 f1 rear
I just bought a '50 F1 and I am doing my research and this thread sparked my interest.....
My truck has the 41 stamped with a W 51/13 tag. I also have a 4 speed transmission which hasn't been mentioned before. Will swapping to a 3 speed help me a little or are you still convinced that a rear or gear change is necessary? Thanks. |
04-14-2014, 10:58 AM | #14 |
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Re: 1950 f1 rear
Our '51 F-1 has a Dana 44 with 3.52 ratio, I'm running a '53 Merc, basically stock, backed up to the original three speed and the truck is an excellent highway cruiser.
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04-14-2014, 11:10 AM | #15 |
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Re: 1950 f1 rear
That looks like the rear end in my truck as well. I will be checking some numbers this evening!
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04-14-2014, 01:02 PM | #16 | |
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Re: 1950 f1 rear
Quote:
Interestingly, the '51-'52 3.92 axle uses 47 / 12 ring and pinion; the carriers are different between the D-41 and D-44.
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04-14-2014, 01:10 PM | #17 |
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Re: 1950 f1 rear
So a definite benefit would be the synchro, but no other since it is 1:1.
Good place to start. |
04-14-2014, 05:22 PM | #18 |
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Re: 1950 f1 rear
The 3-speed is a better highway ratio set and you won't have to double clutch every shift like the old stump puller. The 4-speed's 1st gear is almost a granny but not quite. You have to shift real quick to 2nd with a double clutch or grind em. I'd go for a 3-speed any day unless you have an F2 or F3 and plan on hauling heavy loads.
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04-14-2014, 08:22 PM | #19 |
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Re: 1950 f1 rear
I changed from the crash box 4 speed to the regular 3 speed in my '48 F-1. What a difference in drivability!! If you go down this route be aware that the driveshaft, rear support and u-joint are different. Everything is readily available from the usual vendors except the driveshaft and yoke. I found mine (with yoke!) leaning against a barn in Maine!!
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04-14-2014, 10:05 PM | #20 |
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Re: 1950 f1 rear
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