A buddy of mine replaced a /6 in his 66 Val w/ AT. The motor started up wonderfully, but when he put it in gear, nothing. I have all clutch cars, so I had nothing to add. Is there somewhere for him to start looking. Maybe the torque converter?

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/6 '67 Barracuda convertible, electronic ignition, 4-OD, street cam, SBP KH discs, 3.55 SG 7.25" 1" t-bars. Bilstein.
340 '67 fastback, Doug Nash 5-speed.
1988 Toyota pickup work truck

Check the cheap and easy things first.
Fluid level?
Shift linkages / adjustment?

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

Dis-connect one of the AT's coolent lines and start the engine, see if the trans is pumping fluid. (a section of rubber hose and a fluid catch can will reduce the mess)
Did he remove or change converters?
DD

His mom's in the hospital, but I'll have him start with these initial checks. Not sure about converter.

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/6 '67 Barracuda convertible, electronic ignition, 4-OD, street cam, SBP KH discs, 3.55 SG 7.25" 1" t-bars. Bilstein.
340 '67 fastback, Doug Nash 5-speed.
1988 Toyota pickup work truck

Hopefully the converter didn't slip out of place.

This may sound stupid, but, he did remember to put those 4 bolts back in between the flexplate and converter, right? EDIT: Ignore this, obviously he did if the car started otherwise the starter would just spin the converter in place.

Leave the car in reverse when checking the fluid lines as I believe thats when the most fluid is being moved.

Is he using a 66 auto trans, with a 68 or later converter? If yes the splines on the trans input shaft are not engaging the splines inside the converter. The 66 trans has a smaller diameter and different spline count then the later converter.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

That's possible Charrlie_S, since I think it was a replacement motor with the 66 transmission. If it is pumping fluid, that would be the next thing to find out.

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/6 '67 Barracuda convertible, electronic ignition, 4-OD, street cam, SBP KH discs, 3.55 SG 7.25" 1" t-bars. Bilstein.
340 '67 fastback, Doug Nash 5-speed.
1988 Toyota pickup work truck

If it is the input shaft problem, the trans will pump fluid but the car will not move.
DD