rearend question
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Junior User
Joined: Feb 2004
Posts: 93
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From: walnut cove,nc
rearend question
i am doing a frame off and noticed all the spot welds were broken loose where the axle housing is welded to the gear housing it is aframe out of a 50 f1 i have a couple of 51 and 52 rearends i was going to put in heres my question the tag on the 50 says its a 51/13 the 51says 47/12 the47/12 is3.92 but what is the 51/13 the only info. i can find on the 50 rearend says it should be 43/11 what is the 51/13 out of thanks ,clyde
Cargo Master
Joined: Feb 2008
Posts: 2,795
Likes: 129
From: Windermere Valley,B.C. Ca
Sorry, I don’t know the info that you are looking for, hopefully someone will help you.
There was a thread about the different ratios for different years a week or two ago, it’s not easy but if you persist with the search feature you might find it. If I calculated the ratios that you have correctly they are all very close so (other then knowing what the original was from) they all would work.
50 says 51/13 is a 3.92 ratio
51 says 47/12 is a 3.92 ratio
50 rear end says it should be 43/11 is a 3.90 ratio
There was a thread about the different ratios for different years a week or two ago, it’s not easy but if you persist with the search feature you might find it. If I calculated the ratios that you have correctly they are all very close so (other then knowing what the original was from) they all would work.
50 says 51/13 is a 3.92 ratio
51 says 47/12 is a 3.92 ratio
50 rear end says it should be 43/11 is a 3.90 ratio
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