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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Axle Codes

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Old Nov 23, 2003 | 06:03 PM
  #1  
Thunder's_Rolls's Avatar
Thunder's_Rolls
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From: Southern Maine
Axle Codes

I'd like to know if anyone can help decipher some axle codes for my '84 F-250 ... the code is "C3" on the door post. there are no "tags" on either axle. any help would be great.
Fords rule !!!
 
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Old Nov 23, 2003 | 11:29 PM
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From: lino lakes, mn
c3 in 84 is 3.54 to 1
 
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Old Nov 23, 2003 | 11:51 PM
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From: GANS
In 85, 33 is for 3.54 to 1, and 35 is 4.11 to 1. That doesn't really help though

is it an auto or manual? A lot of auto f-250s came with 3.54s, and at least in '85, all the manual F-250HDs i've seen have 4.11s.
 
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Old Nov 24, 2003 | 06:58 PM
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[QUOTE]Originally posted by bremen242
[B]In 85, 33 is for 3.54 to 1, and 35 is 4.11 to 1. That doesn't really help though

33 is the code for an OPEN rearend that is 3.54 to 1 c3 is for POSI that is 3.54 to 1
 
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Old Nov 24, 2003 | 09:59 PM
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From: GANS
OIC. I kinda thought it might be posi. With fords, it seems like if it has a letter in it, its a posi.
 
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