OK well see if you can follow this... I swaped engines from v6 to v8 and obviously the tranny changed to. Well the tranny i put in was set up for electronic siginal, VSS. The speedo when it was a v6 was cable driven, I got a 145mph speedo to replace the old one and it turns out this speedo is cable driven too. I need to know what it takes to change the end of the shaft with that flat gear that the VSS gets the signal from, to the worm gear to make it cable driven. Does the whole shaft have to come out from the inside of the tranny or does the gear just slide on and off the shaft and how? I would like to know before I rip into this and any help would be apreciated. Oh, and maybe a gm part number on the cable driven gear to replace the other one with, I would like the speedo to be accurate. By the way I have 3.42 gears.

 

Come on guys, this is important

 

try this page for info you are seeking.

http://www.geocities.com/crosley_az/700spd.htm

 

Well now, that's a bit weird. I just pulled a full gauge cluster, as opposed to an idiot light cluster, from an '86 Firebird V6. In '86, if your Firebird had idiot lights, you got a mechanical speedo. If you had full gauges, you got an electric speedo.

I pulled the electric VSS from that donor car's tailshaft of it's 700r4. (And I wasn't thinking clearly, after it popped out, the tailshaft started draining trans fluid onto me- oops! Try wiggling out from under a junkyard car quickly- it doesn't happen. ) Anyway, the electric VSS was held in with a single bolt and the C-shaped clamp, and had a gear on the end. It looked like a mechanical gear would just slide into the same hole... not quite like that geocities page described. From the setup, I don't think there was any signal generator disc. The VSS sensor had a little shaft protruding from it; onto which was a plastic gear.


(oops) Didn't read that geocities page all the way to the end. The VSS I pulled looks just like the very last picture on that page.