yes. The speedo pickup on the SD is electronic - a prox sensor that reads slots in the parking pawl plate. The pickup is mounted in a smooth bore hole in the trans rear cover. I don't know for sure if the rear covers are the same, but either way it's easy. The mechanical speedo drive runs off the same helical gear that turns the governor and secondary pump. having the cover off should be all you need to understand. Use the best output shaft shims from either trans or buy from dealer(about $1) to get end play right. The output yoke needs either a 12 point, 30mm socket, or a spanner tool which you can make easily out of a short piece of 1-1/4" black pipe.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.