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post #1 of 5 (permalink) Old 07-14-01, 11:22 AM Thread Starter
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Join Date: Jun 2001
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roll can someone help me decode this

i have a id tag off my rear dana 60 of my 78 f 250 and the tag reads 3 73 D8TA HO
603900-1
i think the 3 73 is the gear ratio and if it is what would i need to go to if i want to put 35in tires on my truck someone please help
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post #2 of 5 (permalink) Old 07-23-01, 12:51 PM
Fawkin Fordhead
 
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Yup, 3.73:1 is the ratio. What size tires do you have now? I'll need that to figure out what you'll need to keep the same performance you have now.
Evan MacDonald

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Evan MacDonald
00 F250 SC 4x4, PSD/6 speed
86 F250 4x4, 460/4 speed
81 F100 4x4, 351W/4 speed
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post #3 of 5 (permalink) Old 07-23-01, 05:22 PM Thread Starter
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Wink

theres 31in on there right now and i dont remember if i put this but im putting in a 400hp ford 400 hope that helps and i want 35in tires on it too just to let you know again
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post #4 of 5 (permalink) Old 07-23-01, 06:16 PM
Fawkin Fordhead
 
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To keep the gearing so that it's equal to what you have now, you'll want something around 4.20:1, but, 4.56 will be better, more power to turn the tires, and all that good stuff. If your concerned about gas mileage, that 400 should handle 35's with your 3.73's
Evan

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00 F250 SC 4x4, PSD/6 speed
86 F250 4x4, 460/4 speed
81 F100 4x4, 351W/4 speed
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post #5 of 5 (permalink) Old 07-23-01, 10:45 PM Thread Starter
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so i should keep the 3.73 if im on a budget or get the 4.56 or it doesnt really matter cause they'll both work
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