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Old 06-07-2020, 10:17 PM   #1
gmc684x4
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Auto column 4 speed

I am looking at doing a 4 speed auto build

My question is the only thing you need to change on the column is the shift indicator lens to a 4 speed auto ?

70 K20 thinking about dropping in a 6 litre with its matching 4l80E tranny

seen a few youtube blogs they show the new linkage and not really show what they did to the factory auto column
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Old 06-09-2020, 08:52 PM   #2
pcmcobra
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Re: Auto column 4 speed

https://www.lmctruck.com/1973-87-che...ing-components
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Old 06-09-2020, 08:53 PM   #3
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Re: Auto column 4 speed

all you need. The detents should match pretty close, might not be absolutely perfect but close enough.
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Old 06-09-2020, 09:01 PM   #4
gmc684x4
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Re: Auto column 4 speed

Thanks that is what I was thinking it should work
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Old 06-10-2020, 08:56 PM   #5
thehata1
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Re: Auto column 4 speed

I have a 72 C2500 with a 4L80e with the lokar rod and linkage. Mine fits up and operates great. The indicator is off a hair, but that just needs to fixed with some adjustmenting.
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Old 06-11-2020, 01:13 PM   #6
gmc684x4
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Re: Auto column 4 speed

I am looking at droping a 6 liter with 4l80e into a 70 k20 with a 205 tcase ORD adapter

Looking at one of my parts trucks has auto column missing shifter cover

Thank you for the repĺies
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