1 Wire NSS on a 904?

[zdillinger]

Gents,

Is there such a thing as a 1-wire neutral safety switch on a 904 transmission? The trans that was just pulled out of my '73 has a 1 wire; the 904 that is replacing it has a three wire. I know that the center pole of the three wire can be hooked up to the Brown / Yellow wire that runs to the starter relay and that the other two poles are involved in the reverse light circuit (one brings power from the fuse box; the other runs to the rear harness). According to the shop, there is only the one wire in the harness, not three like there should be per the FSM.

Zach

 

[plymouth67]

I think the one wire was from 66 and earlier....

 

[zdillinger]

Interesting. I guess the trans that was in the car isn't the right trans for the car then. I suppose the reverse lights must work at the column and not the switch.

 

[Nacho-RT74]

actually half 69 and earliers

you can match an early tranny on a newer car changing the rostercomb and NSS switch

 

[zdillinger]

actually half 69 and earliers

you can match an early tranny on a newer car changing the rostercomb and NSS switch

Got it. The new trans I got has the proper comb and NSS and bolted right in. The '73 wiring harness has the proper 3 wire connector, so all is right with the world. Car runs great, but you can tell the trans sat for a little while. Delayed engagement in reverse and first when cold, but revving it up a little will make it kick in. I suppose this could be the 3000 rpm stall convertor that the trans came with.