A500/A518 Cars, OD and L/U on a toggle or auto?

jrlegacy23 said
I am in the process of doing an A518 swap in my 68 Barracuda. For the guys running a similar set up, do you have toggle switches for the overdrive and lockup? Or do you run an automatic OD and L/U set up?
Which do you prefer and and why? I am looking at a PATC kit (link below), or running rocker switches.

PATC 727 to 518 / 46RH Conversion Kit. Click here for 727 to 46RH swap wiring diagram

View attachment 1715454712

I built a kit like the one you posted except the pressure switches I used are adjustable for when they switch.
If my two toggles are both on the trans shifts up and down fully auto.
Or I can shut either or both off manually.

MileHighDart said
Well, I have my A500/42rh swap up and running. Like the switches and the location is right where my hand lands if I lay my hand down on the console.
Overdrive is working great, cruising at 3000 rpm, flip the switch and rpm drops to like 2100. Love it, but not having so much luck with the converter lockup. The first time I tried it I swear I felt it and got a small drop I'm rpm, but it has not worked since so I'll have to figure out what's going on there.
But love the O/D.

The R's don't drop a lot with the lockup (300 maybe)
Don't forget to turn lockup off before you take an off ramp and come to a stop.:D

Also, dont know if you know this yet or not but OD will not come on unless you are in 3rd already since 3rd gear oil also supplies OD.
This is normal.
You can activate lockup whenever you want in any gear and any RPM though.:D

Hope lockup is just the switch, but by now I'm sure you know how to trouble shoot that.