Ranzan

I have switched out my old trans for a recently rebuilt trans but I have an issue where my old trans has a double plug for the kickdown but the other one is a single plug

oldcutlass

Is the new transmission another Jetaway with a switch pitch torque converter?

Ranzan

Yes it is

oldcutlass

Then you have a problem, they require 2 electric connections. 1 for kickdown and 1 for the switch pitch. Your new transmission maybe a Jetaway from a 1968 car.

Ranzan

Well crap lol
looks like a new pan gasket and put the original back in …
serves me right for not even looking before hand 🤦‍♂️

oldcutlass

You can use it, with a non switch pitch torque converter and wire the kickdown function off your stock switch.

Ranzan

How do you go about that ?
do I just eliminate one plug off the pedal control assembly ?
if so which one

oldcutlass

You can do this down by the transmission and just connect the wire that only provides power at WOT. The other wire will provide power at idle and WOT. You can us a 1/4 female spade terminal and heat shrink.

jcdynamic88

you don't have to eliminate or rewire anything,use the existing harness from switch to trans ,the harness should plug onto the trans using one terminal

joe_padavano

^^^This. Just be aware that without the switch pitch function, the car will be even slower off the line.

jcdynamic88

if it's a non switch pitch trans he's installing he doesn't have much choice,isn't the stall speed different on a non switch pitch?

joe_padavano

That was my point. The 1.76:1 first gear in the Junkaway is almost like starting in second gear in a normal trans. The added torque multiplication afforded by the switch pitch mitigates that somewhat. He loses that with the replacement.

Ranzan

Thanks guys for the input .
if I’m loosing that much off the bottom end I will probably just pull the trans and put my original back in .
like I said nothing wrong with it shifts well lust needs a pan gasket installed

oldcutlass

If you have it installed, why not try driving it first.

Ranzan

She has been high and dry for the last 5 months waiting on a harmonic balancer to fire it up

Ranzan

joe_padavano

And that was the reason for getting another trans???

Ranzan

Joe no . I had to pull the 330 out for a rebuild but need the car for a road trip to the coast so bought a temp 350 to put in the car which came with the rebuilt jetaway