speedo wrong
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Senior User
Joined: Mar 2014
Posts: 354
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From: AZ
speedo wrong
I have an 83 F100 Flareside with a 302 and AOD transmission. I replaced the transmission with a rebuilt one and now the speedo is showing ten miles faster than I am traveling. The numbers on the transmission where the speed connects to it are RF-EOAP-7A040-3D. I provided my truck information for the replacement but could they have provided one from a vehicle that had a different gear in it to change my speed reading? If so how do I determine what gear tp purchase fopr the end of the cable to get it right. The only plus is that I should never get a speeding ticket, but if you were following behind me I will hear your horn.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
E0AP-7D040-3D is actually BD
This is the ID number marked on and for the extension housing, the part number is E0SZ-7A039-A which is correct for your truck.
The speedo DRIVE gear is made as part of the AOD's output shaft.
How many teeth does the DRIVEN gear (end of cable) have?
This is the ID number marked on and for the extension housing, the part number is E0SZ-7A039-A which is correct for your truck.
The speedo DRIVE gear is made as part of the AOD's output shaft.
How many teeth does the DRIVEN gear (end of cable) have?
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Senior User
Joined: Mar 2014
Posts: 354
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From: AZ
Thanks for the response number dummy and sorry for the late reply, but I have been traveling the frindly skys all week. I have 18 teeth on the speedometer cable where it inserts into the transmission.
Posting Guru
Joined: Jul 2015
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From: Northeast Ohio USA
I have an 83 F100 Flareside with a 302 and AOD transmission. I replaced the transmission with a rebuilt one and now the speedo is showing ten miles faster than I am traveling. The numbers on the transmission where the speed connects to it are RF-EOAP-7A040-3D. I provided my truck information for the replacement but could they have provided one from a vehicle that had a different gear in it to change my speed reading? If so how do I determine what gear tp purchase fopr the end of the cable to get it right. The only plus is that I should never get a speeding ticket, but if you were following behind me I will hear your horn.
Lead Driver
Joined: Apr 2007
Posts: 5,958
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From: Houston
Ha, mine reads slower than I am going, my gps on my old phone said when I was sitting on 40 mph I was really going 42 mph but these mobile police units that tells your speed they are saying I am doing 40 mph when I am reading 30 mph.
Seems like I see a bunch of this happening for Ford trucks for some reason we get so many at work that need gear swaps.
Seems like I see a bunch of this happening for Ford trucks for some reason we get so many at work that need gear swaps.
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