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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 78 Chevyrado on August 09, 2026, 12:10:23 am
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I don;t know why it was like this but when I got the 78 C20 it would never kickdown ever...
I tried to set it by the way the manuals say to do it.
Still didn't work. So I did this mod to my switch under the dash. The way to set it is to pull it one way then floor the gas and it will set that switch. well on mine if you floored the gas it never even touched the switch. no idea if that was from factory or grandad did something wrong but here was my solution. wrap ever larger pieces of hose until it acts right. took this much of layers of rubber hoses to make my truck act right. It's been perfect ever since, 20 years and growing.