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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

Spline count?!!?! 9"

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Old Jan 23, 2011 | 05:58 PM
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Spline count?!!?! 9"

Afternoon All, watchin the game and FTE,,, multi-taskin at it's best! Oh yeah,, got beer too! Life IS good!!
Anyways,,, stock 66 F100 what would be the spline count,,, my 77 has 31,, but is also has factory lim-slip,,,what would my 66 have,, would like to know without pullin it apart,, my first 66 had 28,, don't know what was standard.

Thanks and go Steelers,, ( I am a KC Chiefs fan,, but,,,,the morons didn't make it)
 
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Old Jan 23, 2011 | 06:22 PM
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If it is stock, it would be 28
 
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Old Jan 24, 2011 | 05:15 AM
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I agree 28. You can install the complete rear end under your truck. The rear tires will track the front.




John
 
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Old Jan 24, 2011 | 05:41 AM
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B7TZ-4234-A .. 28 Spline Axle Shaft / Right/Left is the same / Applications: 1957/67 F100 w/a 9 inch.
 
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Old Jan 24, 2011 | 10:23 AM
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Thanks Gents,,, It has 3.50's in it now, and it is workin the lil'six to death up here in the "hills" so I was debating on going to 4.10's,,,,
 
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Old Jan 24, 2011 | 08:05 PM
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Originally Posted by Pickupmanx2
Thanks Gents,,, It has 3.50's in it now, and it is workin the lil'six to death up here in the "hills" so I was debating on going to 4.10's,,,,
Yikes......
Have ya got extra tall tires?

Maybe a 3.70....used to be pretty common....
 
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Old Jan 25, 2011 | 10:15 AM
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Originally Posted by RJP66F100
Yikes......
Have ya got extra tall tires?

Maybe a 3.70....used to be pretty common....
My last 66 F250 had 4.10's/300I6/NP435 worked just fine for up here,,,
highway speed was a leisurely 55-60 and still got 15mpg.
I prefer the slight power advantage of 4.10's over windin him out going up grades in 3rd with 3.50's,,,,
 
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Old Jan 26, 2011 | 09:11 PM
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Surely you don't have tires as tall as your F250 had, do you? A couple inches of tire height makes a big difference.

^ Not trying to be a pain, I'm sure you know what ya want.
 
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Old Jan 27, 2011 | 10:43 AM
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Had 265/75/16 on my 66 F250,,, about 31 1/2" or so
waitin for my new tires for my 66 F100 265/70/15 about a 30 1/2" or so,,,, I will drive it with them for a bit and see,,,
 
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