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Gar ratio question

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Old Aug 3, 2019 | 08:48 PM
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Default Gar ratio question

I am getting a 9" ford f-150 rear end from a 1995 ford f150. Any idea what the gear ratio could be?
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Old Aug 3, 2019 | 09:07 PM
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Nope, because that's not an original axle. You'd have to either count the revs, or find the numbers stamped into the edge of the ring gear.
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Old Aug 3, 2019 | 10:16 PM
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If you know what truck the rear end came from, you could look at the door sticker, get the axle code then look it up. But even that rear end may not be the original for that truck
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Old Aug 4, 2019 | 12:07 AM
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2.73 (rare) 3.08, 3.31,3.55(most common) or 3.73(rare). The axle is a 8.8" not a 9".
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Old Aug 4, 2019 | 08:19 AM
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2.73= turd
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Old Aug 4, 2019 | 09:18 AM
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Nine inch isn’t stock, it originally came with an 8.8 rear axle. If it’s truly a 9”, then someone swapped it in at some point, but if it is and you have the third member out, count the pinion teeth and the ring gear teeth, and divide the two, that’s your ratio. If it’s an 8.8” and the tag is gone, you’ll have to remove diff cover, and count the teeth on both gears, and divide for your ratio.
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Old Aug 4, 2019 | 05:06 PM
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Originally Posted by DarrinT04
2.73= turd
My '95 F150 (in my signature) is very peppy.

But it's moot since that's not a 9" ratio.
https://www.drivetrain.com/parts-cat...d-pinion-gears
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Old Aug 4, 2019 | 06:44 PM
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Originally Posted by Steve83
My '95 F150 (in my signature) is very peppy.
Everyday driving might be alright, but pulling would be a different story. I once drove a 2000 f150 4.6 with 3.08s and it felt weak no matter the conditions
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Old Aug 4, 2019 | 09:22 PM
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It's not a pulling truck - it's an econopickup. And when it's driven that way, it's very peppy.

But my Bronco has 3.08s, and it'll pull the world. But it has a granny 4sp.
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Old Aug 6, 2019 | 07:35 AM
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Originally Posted by Steve83
It's not a pulling truck - it's an econopickup. And when it's driven that way, it's very peppy.

But my Bronco has 3.08s, and it'll pull the world. But it has a granny 4sp.
Yeah, I've seen your pics of your bronco pulling close to 10k
My '04 has 3.55 gears. It has a 4.6. I have pulled 16k with it once. Speed dropped to 15 mph at WOT on a hill. And it's still not what I call "quick" when bot pulling anything. But that 2V 4.6 is nearly indestructible if you maintain them if you ask me.
My new '05 has the 3V 5.4 and 3.73s. It is a lot stronger no doubt. And a lot quicker empty. But I'm not going to abuse it like I have my '04
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