E4OD Output Shaft

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Mar 20, 2009 | 07:22 PM

danlee

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E4OD Output Shaft

I have a 2 WD E4Od tranny that I'm retrofitting into an '83 F100. It has no speedometer gears cut into the output shaft. I need to get an output shaft with the speedometer gears.

I found some NOS shafts for sale cheap on Ebay. The part numbers are:

F81Z-7060-AA - 4R100 Transmission in a 2 Wheel Drive Vehicle with No Speedometer Gear

F81Z-7060-BA - 4R100 Transmission in a 4 Wheel Drive Vehicle

F81Z-7060-CA - 4R100 Transmission in a 2 Wheel Drive Vehicle with a 7 tooth Speedometer Gear

F81Z-7060-DA - 4R100 Transmission in a 2 Wheel Drive Vehicle with a 8 tooth Speedometer Gear

I think that I need the 8 tooth speedometer gear. I am replacing an AOD transmission.

These are 1998 vintage parts, my transmission is ? vintage, and certainly older than 1998.

Which shaft do I need and will these shafts fit my older E4OD tranny?

Mar 20, 2009 | 07:34 PM

danlee

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From: Delaware

The # on the case of my tranny is:

RF-E9TP-7A040-C6

I know that means it's an '89 case.

Mar 21, 2009 | 08:09 PM

danlee

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From: Delaware

I found the answer to one of my questions. The 8 tooth speedometer gear is used in '89 & up transmissions, while the 7 tooth gear is used in 94 & up transmissions.

I can see no reason why I can't use a '98 vintage 8 tooth shaft in my '89 model E4OD. The only other difference seems to be a cup plug in the later versus a bushing in the early.

Please give me some opinions. I'd like to order one of these NOS output shafts ASAP.