Team,
I currently have a TH350 with a regular spedo. I just noticed my new 700R4 has an electrical input. How can I change the 700R4 over to accept my cable? Can I simply pull the one off the TH350? If not, where can I get the adapter?

Have you tried Bowtie Overdrive They may have what you need.

use your local tranny shop. same parts as a turbo 400 for the adaptor. tom

Thanks, so the TH350 part will definatly not work plugged in to the 700R4. I need a TH350/TH400 converter of somesort to go 700R4?

Anyone know the name or part number for this part so I don't sound silly when I ask for one?

Well I found this. Looks a little scarey.
http://www.geocities.com/crosley_az/700spd.htm
Then the 4th gear lock up info on his page is interesting too. I'm not sure how to tell if you have a lock up converter, but I'd like to find out.

They guy that built mine said he had to add the drive gear to the tail to convert to mechanical speedo. I don't know if this is difficult, but he came across like it was no big deal.