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#1
01-09-2020, 10:37 PM
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CY 400 turbo question
I recently purchased a 1970 LS6 CY Transmisson case with partial vin and GM of Canada Docs. I know the internals are different than standard 400’s. My question is about a 73 Z28 CY Transmisson. Would all of the internals be the same as a 1970 CY Transmisson? Thanks Steve
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70 Cortez Silver LS6 4.10 Automatic 70 Classic White LS6 3.31 4 speed 70 Astro Blue ElCamino (clone) LS5 5 speed 70 Concours Wagon Fuel injected ‘70 LS6/700R4 70 Cranberry Red LS6 4.10 4 speed 70 Cranberry Red LS6 4.10 4 speed survivor 70 classic white Malibu convertible 
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#2
01-09-2020, 11:53 PM
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One was behind an 11.25 to 1 compression 454/450HP,the other a neutered 9 to 1 compression 350/245HP.
I would imagine the bands,drums,sprags,clutch packs,valve body,and Vacuum Modulator are all different between the two. Not to mention their shift points and Governor.
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#3
01-11-2020, 04:07 PM
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I’ve been talking to a few people about this and they seem to think the governor, and valve body would be the same for the high shift point. It seems they also still used the 6 lug 2400 high performance torque converter. Any other people have some input?
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70 Cortez Silver LS6 4.10 Automatic 70 Classic White LS6 3.31 4 speed 70 Astro Blue ElCamino (clone) LS5 5 speed 70 Concours Wagon Fuel injected ‘70 LS6/700R4 70 Cranberry Red LS6 4.10 4 speed 70 Cranberry Red LS6 4.10 4 speed survivor 70 classic white Malibu convertible
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