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Lock-up or not

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Old Jun 30, 2013 | 08:06 PM
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Default Lock-up or not

Im trying to identify what transmission my 1978 woiuld have come with, a lock up or non lock TH350? The transmission I got with the pile of parts has the elec connection on the side, but doesnt look like it was being used (full of gunk). Any info on lock-up vs non lock up in a 78 would be appreciated.
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Old Jun 30, 2013 | 08:49 PM
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Default Transmission

The lock up torque converter did not show up on Corvettes until 1981.
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Old Jun 30, 2013 | 10:34 PM
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thanks! Any idea what that wire connects to to make the lock-up work? From my reading, I can just use a non-lock up TC and ignore the wire. But what would need to be done to make it work?
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Old Jul 1, 2013 | 04:38 AM
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It sounds like the tranny isn't in the car. Are you sure it's a TH350? The TH400 has an electrical connection for a "kick down" for passing gear. Where is the electrical connection.
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Old Jul 1, 2013 | 07:35 AM
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Originally Posted by my 76 ray
It sounds like the tranny isn't in the car. Are you sure it's a TH350? The TH400 has an electrical connection for a "kick down" for passing gear. Where is the electrical connection.
Yes, the trans is on the bench for a rebuild. It has the 5 sided pan (square with a 45 corner), so unless I completely missed my mark, then it is a 350. Connection is on the driver side.

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Old Jul 1, 2013 | 07:46 AM
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Looks like a TC lock up 350 to me. It came from somewhere.
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