I am going to switch to 3.73 gears. I have an AOD transmission with the 8 tooth drive gear, so I can only be accurate up to a 3.55 with the 23 tooth white driven gear. Is the drive gear changable to the 7 tooth?
Speedo Gear Replacement
- Thread starter larrendeuce
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TRWXXA
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Unless your tires are smaller than stock, the 23-tooth gear is what you need for 3.73s (a 21-tooth gear is for 3.55s).
Your speedo will still be about 5 - 8% off, depending on tire size, but the 23-tooth gear gets you close.
The AODs have the drive gear machined onto the output shaft, so you'd have to change the entire shaft rather than slipping a new gear onto it.
Your speedo will still be about 5 - 8% off, depending on tire size, but the 23-tooth gear gets you close.
The AODs have the drive gear machined onto the output shaft, so you'd have to change the entire shaft rather than slipping a new gear onto it.
Thanks. My friend has a couple 87-88 Thunderbird AOD's that I can get the output shafts from. Are they compatable?
TRWXXA
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larrendeuce said:
You might want to research that online. Please don't take my word for it, but I thought that all the AODs were essentially the same, though some got different gearing for truck applications.
Anyone else more familiar with the AOD tranny family?
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