I am putting a "new" tranny in my 76 Duster and I am trying to get a new torque convertor for it. The only local parts store that can get one is Autozone, but their "amazing and wonderful" computer gives me 2 choices on which to get:

"with lock-up"
"without lock-up"

In my infinite ignorance, I don't know what this means. Can anyone help? Which convertor do I get for my 76 Duster with a slant and a basic 904 tranny?

Thanks in advance,
Billy

What is your "new" tranny out of?

The "lock-up" is referring to the lock-up torque converter. That did not come out until 1978 or so. Look at the input shaft on your transmission. If it has a hole drilled down through the center then it uses a lock-up torque converter.
If there is no hole (but it might have a stubby center drill from the manufacturing process, that hole goes nowhere) then you need the non-lockup converter.
A 1976 Duster did not have a lock-up converter but it is possible to install a later transmission with the lock-up converter.

Thanks, Craig!!

The replacement trans came from a 79 Aspen, so it takes a lock up convertor. The shaft has the hole, just as you described. Looks like I've got to spend $40 more!!

Any news on that grill, Craig?

Thanks,
Billy

Billy, sure wish you had mentioned it when you picked up the transmission. If you are back in this area before you need it, you can have the converter. I have no use for it.

Yes, I drove across town the other day and came back with a refrigerator box to build into a box for the grille. Maybe over the weekend I can build the box and find out what it will cost to ship to you.

Craig