1967 Mustang rear end gears.? - Mustang Evolution

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Old 08-26-2009, 01:30 AM   #1
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1967 Mustang rear end gears.?

I am trying to figure out what gears are in the rear end. Does anyone know what these came stock with? It was originally a 289 with a 2 barrell. It is now a 351W witha T-5 and I am wondering how to tell what is in there already so I do not replace it with the same gears. This is my daily driver but I want to make it a little beefier. I was thinkg 373 for the gears.
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Old 08-26-2009, 02:10 AM   #2
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1967 Mustang rear end gears.?

just answered this same question. go 4.10 or 4.30
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Old 08-26-2009, 02:47 AM   #3
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1967 Mustang rear end gears.?

Check you data plate for the answer on what gears you have. As for what to go with. I just swapped 3rd members out of my 66 Fastback form 2.80 open diff to a 3.25 Trak-Loc and what a world of difference. Gets off the line quicker and still stays low in the rpm range like the 2.80s did. Its the perfect daily driver ratio.
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Old 08-26-2009, 03:00 AM   #4
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1967 Mustang rear end gears.?

it should have 3.00, check the dataplate on the door..top line, next to last number should be a 1 for the 3.00, or 6 for a 2.80, letters A or F would be for Equa-Lock..

these combinations with a T5 would give it a real tall gearing, like

with the 3.00 at 2000rpm and a .75 od T5 and 25 inch tire gives 66 mph
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Old 08-26-2009, 03:38 AM   #5
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1967 Mustang rear end gears.?

Yeah, most likely 2.80 or 3.00 if it's stock.

btw, thinking 3.73 maybe a little too much for a daily. First gear will be wasted for the streets. A 3.55 maybe better.
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Old 08-26-2009, 04:06 AM   #6
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1967 Mustang rear end gears.?

There should be a metal tag on the third member telling you the gear ratio.
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Old 08-26-2009, 04:51 AM   #7
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1967 Mustang rear end gears.?

The most common gears for those cars where 2.80 and3.00.
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