Thanks for the answer Jerry. I put the car up on ramps and checked a few things more. The Linkage appears to functioning properly with a full range of motion. Every position on the gear selector moves the gear selector on the transmission and all appears to have correct detents. Drove the car again and I still only have 1st and 2nd gears.

I unhooked the vacuum to the modulator from the manifold connection side and test drove vehicle again. Still only 1st and 2nd gear and the gears did not appear to slam when changing gears. In fact there did not appear to be any change in shift quality.

I hooked that back up and then unhooked the kickdown cable at the throttle linkage side, rendering the mechanical kickdown portion of the transmission inoperable. Test drove the car again and still only have 1st and 2nd gear. I cleaned the parts well and checked for full motion on the cable and hooked it back up, test driving the car again. Still only 1st and 2nd gear.

During all of these tests the electrical kickdown switch behind the gas pedal has been disconnected. I still have not reconnected this switch as I do not think that would have any affect or help in troubleshooting.

I also grilled my son about how it happened. Now he says he was going down the freeway at 70-75 (probably faster knowing him) and the car started shaking violently. He slowed down and the car would not go over 40 mph. He really has no idea how a car operates (a point of contention between his mother and I) so I am assuming the tach redlined and the shaking was misfiring. He still drove the car at 40 mph to get it home and for about a week before he told me of the troubles. He had been redlining the motor to try to get to speed for a week (I am very upset about that).

Anyway, that's the story as I know it and that is what i have done to check things out. Any other ideas as to what may be wrong so he does not have to find a different tranny?