Identifying Rear End
Moderators: FORDification, 70_F100
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damn_fool
- New Member
- Posts: 14
- Joined: Sun Jan 27, 2013 7:58 pm
- Location: OKC,OK
Identifying Rear End
When looking through the technical article on identifying rear ends of our pickups I noticed the 3.25 option wasn't listed for my year of pickup. I guess it's possible someone switched them out at sometime(but I think this has been on here since day 1) or am I maybe reading something wrong on my tag?
Jeremy
71 F100 that I haven't got to drive once yet. In pieces in the driveway =(
71 F100 that I haven't got to drive once yet. In pieces in the driveway =(
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ultraranger
- Blue Oval Guru
- Posts: 1147
- Joined: Wed Apr 27, 2011 9:15 pm
- Location: Arkansas, Camden
Re: Identifying Rear End
The 3.25:1 rear end ratio was very much available in a '71 F-100.
Your WDM-H code translates to: 9-inch rear end, 3.25:1 ratio, open (single track) differential with 28-spline axles. The WDM-H code was used on F-100s from 1963-1972.
The "9" on the tag denotes a 9-inch rear end. The "1EA" would be the date the rear end was assembled; "1" = the year, 1971. "E" = the 5th month --May. "A" = the 1st week. So, it was assembled the 1st week of May, 1971.
The "324" is a Ford internal code that meant something to the line workers that were putting the parts together. I don't know the specifics of the code number since I've never found any information to what the three-digit codes mean.
Your WDM-H code translates to: 9-inch rear end, 3.25:1 ratio, open (single track) differential with 28-spline axles. The WDM-H code was used on F-100s from 1963-1972.
The "9" on the tag denotes a 9-inch rear end. The "1EA" would be the date the rear end was assembled; "1" = the year, 1971. "E" = the 5th month --May. "A" = the 1st week. So, it was assembled the 1st week of May, 1971.
The "324" is a Ford internal code that meant something to the line workers that were putting the parts together. I don't know the specifics of the code number since I've never found any information to what the three-digit codes mean.
Steve
1969 SWB F100 Ranger. 240-6, C-4, 9" N-case 31-spline Traction-Lok w/3.50 gears.
1968 Mustang. My high school car. Owned since 1982.
2003 Azure Blue Mustang Mach1.
1969 SWB F100 Ranger. 240-6, C-4, 9" N-case 31-spline Traction-Lok w/3.50 gears.
1968 Mustang. My high school car. Owned since 1982.
2003 Azure Blue Mustang Mach1.