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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

C-4 question

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Old Jul 29, 2007 | 09:09 AM
  #1  
hartski's Avatar
hartski
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C-4 question

Does anybody have a source for transmission ratios for a 72 C-4? Also, how do I know how many splines are in my rear end, besides counting them after disassembly?
Thanks
hartski
 
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Old Jul 29, 2007 | 10:25 AM
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66beater
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From: Texas
Its the same as the C6,

Ford C-4 3-spd automatic
2.46, 1.46, 1.0


But a C4 in a truck???
 
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Old Jul 29, 2007 | 11:36 AM
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vanwho
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From: Chester, Va.
Originally Posted by 66beater
Its the same as the C6,

Ford C-4 3-spd automatic
2.46, 1.46, 1.0


But a C4 in a truck???
Hey 66beater! Don't be surprised. I've got a C4 behind the 302 in my truck.
 

Last edited by vanwho; Jul 29, 2007 at 12:00 PM. Reason: more info
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Old Jul 30, 2007 | 04:53 AM
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hartski
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Thanks guys.
hartski
 
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Old Jul 30, 2007 | 05:14 AM
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NumberDummy
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From: Simi Valley, CA
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Automatic transmissions used 1967/72

1967/72 F100/250's with a 240 or 300 I-6 used C4's.

1967/72 F350's with the 240 or 300 I-6 used MX Cruise-O-Matics.

1969/72 F100's with a 302 used a C4.

1967 F100/350's with the 352 V8 used MX Cruise-O-Matics.

1968/72 F100/350's with either a 360 or 390 used C6's.
================================================== ===================
Rear Axle: 1969/72 F100's with a 302 used 28 splined axle shafts without Limited Slip, 31 splined axles with Limited Slip.

Not sure which axle you have?

Look for the AXLE code on the VIN plate.

Post the code here. The FTE axle decoder will not decode 1972 and earlier rear ends codes.
 

Last edited by NumberDummy; Jul 30, 2007 at 05:25 AM.
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Old Jul 30, 2007 | 11:39 AM
  #6  
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fitzwell
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From: texas,earth
Originally Posted by vanwho
Hey 66beater! Don't be surprised. I've got a C4 behind the 302 in my truck.
yep, c4/302 here....works great & doesn't take the power to turn the internals a c6 does.



someday, an aod will reside there
 
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