Re: Transmission Modifications/replacement

Posted by steve-52/200 On 2013/3/19 2:15:11

I was snooping around and found 6to12volt.com itsa company that makes a gizmo that will power a negative ground 12 v device from a 6 v positive ground car
the fellow who runs the place ,Mr Meyer ,has been vvery helpful I sent him a diagram on how to wire up a 518 when doing a 727 to 518 conversion from an artical I found from a transmission company in bossier city La .( i think its PATC) if you google 727 to 518 conversion youll find a couple of great hemmings articals and then a definitive how to by this transmission co . ,maby I can figure how to put the diagram in the threads ,but I sent it to Mr Meyer and asked if it would work, he said sure ,I was worried that if the transmission attached to the engine and the engine is where I ground the pos gr baTTERY what would happen ,

he said no problem .could work around it with a relay and have an off switch for when the car sits ,he was willing to add his wiring diagram on how o hook up his little box from his site ,into the one I supplied him for the transmission ,his device is mainly for if you wanted to use a new radio/cd or something usually .
i didnt know the amperage draw of a solenoids but figure it couldnt be too to much ,the transmission guy said they dont remain energised after the shift ,only while they shift

theres 3 518's they can be distinguished by the electical coupling that hangs out of them

the oldest is a 2 pin this is the overdrive solenoid only

next is a 3 pin this is the one you want, it has a overdrive solenoid and a torque converter lock up solenoid its more eficient than the one without this and i like the ideq of a locking torque converter because its replacing an ultramatic which does that

and the modern one is an 8 pin ,bad, need a computer ,no computers in a packard please
the sierra grove packard adapter guys kit can handle either transmission
but the 518 takes some fussing witht the linkage ,move the mount as the tranny is a touch longer and shave a spot on the case
so there getting closer!!