Strangest Problem. Help please
Thread Starter
Instructor
Joined: Aug 2014
Posts: 116
Likes: 2
From: Freehold NJ
Strangest Problem. Help please
Ok...1973 corvette runs and drives fine. Almost everything works fine...but..........
if I turn my headlights on in high, it’s fine. The moment I push the button to low, the trans won’t shift out of first. Auto transmission. Head lights off, no issues, high beams, no issues. Lights move from high to low, but trans won’t shift if low beams are on. Someone said to check the trans drop down switch near gas petal. They said there is a electric signal from this switch to the transmission that if you floor the gas petal will drop the trans down. How do I trouble shoot? Does anyone know when this line goes into the trans? If I find this line...I guess I can test for change when I change highs to low....any thoughts?
if I turn my headlights on in high, it’s fine. The moment I push the button to low, the trans won’t shift out of first. Auto transmission. Head lights off, no issues, high beams, no issues. Lights move from high to low, but trans won’t shift if low beams are on. Someone said to check the trans drop down switch near gas petal. They said there is a electric signal from this switch to the transmission that if you floor the gas petal will drop the trans down. How do I trouble shoot? Does anyone know when this line goes into the trans? If I find this line...I guess I can test for change when I change highs to low....any thoughts?
Intermediate
Joined: Oct 2018
Posts: 36
Likes: 8
If it is a 400 then it uses a kick down switch it's either on the fuel pedal or on the carb linkage. If this is the case it sounds like some one tapped into the wire going to the low beam. If this is the case it will stop it from shifting because the switch is closed when it shouldn't be. This is a common problem when adding a turbo 400 in place of a 350. I hope this helps let me know If you need to know more
Mshawn
Mshawn
Last edited by Mshawnm109r; Oct 24, 2018 at 09:53 PM. Reason: Misspellings
Burning Brakes
Joined: Jul 2006
Posts: 1,047
Likes: 12
From: SoCal
If it is a 400 then it uses a kick down switch it's either on the fuel pedal or on the carb linkage. If this is the case it sounds like some one tapped into the wire going to the low beam. If this is the case it will stop it from shifting because the switch is closed when it shouldn't be. This is a common problem when adding a turbo 400 in place of a 350. I hope this helps let me know If you need to know more
Mshawn
Mshawn
