1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

my rear end

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  #1  
Old 10-17-2018, 07:51 PM
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my rear end

this is supposed to be from a 55 F100
can anyone tell me more?I wanna use it with a flathead 6 and a WC T5
 
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Old 10-17-2018, 10:48 PM
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What? No pic.
 
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Old 10-17-2018, 11:15 PM
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With a T5 trans i would guess you may want a rear end gear ratio around 3.5 Or 3.7? To 1 depending on your intended driving and terrain. You may just want to use a 9" rear from a 68 to 72 f100 with the gearing to suit your needs?
 
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Old 10-18-2018, 04:36 AM
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MY RE


DANA 44

PUMPKIN

47/12
 

Last edited by Ricardo Chambers; 10-18-2018 at 04:38 AM. Reason: PICS MISSING
  #5  
Old 10-18-2018, 02:46 PM
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Many of these rearends had 3.92 rear gears. Best way to tell is hold one axle still while turning the other axle and count the number of revolutions the pinion turns on one complete revolution of the wheel. Not very scientific but it’ll get you close. If you want to know for sure remove the rear plate and look on the ring gear’s side. It will be stamped into the ring gear.
 
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Old 10-18-2018, 04:48 PM
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Originally Posted by bjmayberry2
Many of these rearends had 3.92 rear gears. Best way to tell is hold one axle still while turning the other axle and count the number of revolutions the pinion turns on one complete revolution of the wheel. Not very scientific but it’ll get you close. If you want to know for sure remove the rear plate and look on the ring gear’s side. It will be stamped into the ring gear.
if the ratio tag is right 47/12 = 3.91666667
hopefully the WC T5 will be good?
 
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Old 10-18-2018, 04:50 PM
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Or you can just read the tag.

This might help you on your RPMs. https://www.blocklayer.com/rpm-geareng.aspx
 
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Old 10-18-2018, 07:13 PM
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Originally Posted by bjmayberry2
Or you can just read the tag.

This might help you on your RPMs. https://www.blocklayer.com/rpm-geareng.aspx
I appreciate the input!!
 
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Old 10-18-2018, 08:20 PM
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Makes you look fat in those jeans...

Sorry I couldn't resist..
 
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Old 10-18-2018, 09:33 PM
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could be worse
yoga pants
 
  #11  
Old 10-19-2018, 12:33 PM
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Originally Posted by jmadsen
With a T5 trans i would guess you may want a rear end gear ratio around 3.5 Or 3.7? To 1 depending on your intended driving and terrain.

You may just want to use a 9" rear from a 57 to 72 f100 with the gearing to suit your needs?
Fixed it for you...

 
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