quarnstrom

I changed the ring & pinion on my '93 automatic from the 3.91 standard final drive ratio to a 4.33 ring & pinion, which results in a 4.10 final drive. This is very close to the 5-sp. manual ratio. Will the speedometer driven gear (in the transmission) from a manual fit in the automatic? If so, I'd like to buy one. If not, where can I buy a used automatic 4.33 gearing? Also, my used original 3.91 ring & pinion is for sale.