74 grinding when going into park?
Thread Starter
Burning Brakes
Joined: Apr 2012
Posts: 1,084
Likes: 96
From: Bowmanville Ontario
74 grinding when going into park?
Hello all
This just started happening and has me a little freaked out.
I pulled the car out of the garage today to do some interior work and as soon as I put the car in park, this awful grinding sound started. I quickly turned off the car.
After doing the work, I started it up and all was fine, I put the car back in the garage and as soon as I put it in park the sound was back.
It almost sounds like the started re-engaged on a running engine.
Anyone had this before?
Ken
This just started happening and has me a little freaked out.
I pulled the car out of the garage today to do some interior work and as soon as I put the car in park, this awful grinding sound started. I quickly turned off the car.
After doing the work, I started it up and all was fine, I put the car back in the garage and as soon as I put it in park the sound was back.
It almost sounds like the started re-engaged on a running engine.
Anyone had this before?
Ken
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
while it could be the starter its more likely a transmission issue with it not going all the way into park and not going all the way out of drive. next time you stop , put it into nuetral and see if it still does it. It may require you taking the shift cable free from the transmission shifter lever at the transmission , moving that all the way foward till it stops and then adjusting the cable foward to match up, and reinstalling it. hope this helps
Thread Starter
Burning Brakes
Joined: Apr 2012
Posts: 1,084
Likes: 96
From: Bowmanville Ontario
Seat belt interlock system?
I found this looking over other posts.
http://home.comcast.net/~vettfixr/page16.htm
But this is for starting problems. do you think this fixes my problem also? The seat belt receivers are not connected and may not be since I purchased the replacement set from Corvette Mods.
I found this looking over other posts.
http://home.comcast.net/~vettfixr/page16.htm
But this is for starting problems. do you think this fixes my problem also? The seat belt receivers are not connected and may not be since I purchased the replacement set from Corvette Mods.
Drifting
Joined: Jul 2002
Posts: 1,995
Likes: 110
From: Garland Texas
The interlock system is more involved than just the seat belt interupters. It also has an over ride built into it to start the car. This is what is messing up. Best thing to do is get a wiring diagrahm and bypass the whole system.
Mike
Mike
Thread Starter
Burning Brakes
Joined: Apr 2012
Posts: 1,084
Likes: 96
From: Bowmanville Ontario
That is incredible that it has the capability to start the car.
Sounds like an early version of a wireless Remote Starter.
Just went out to the car and found the relay. Will bypass it tonight.
Thanks guys
Sounds like an early version of a wireless Remote Starter.
Just went out to the car and found the relay. Will bypass it tonight.
Thanks guys
Le Mans Master
Joined: Aug 2006
Posts: 7,426
Likes: 1,559
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Don't destroy the relay
You do not have to cut and solder the relay. To bypass just jumper together the 12 light green/black to 12 purple.
Your problem could be in the:
Neutral safety switch
Ignition switch
Seat belt interlock relay
Your problem could be in the:
Neutral safety switch
Ignition switch
Seat belt interlock relay
Last edited by Peterbuilt; Sep 23, 2013 at 02:17 PM.
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Thread Starter
Burning Brakes
Joined: Apr 2012
Posts: 1,084
Likes: 96
From: Bowmanville Ontario
Not sure where the Neutral safety switch is just yet.
Thread Starter
Burning Brakes
Joined: Apr 2012
Posts: 1,084
Likes: 96
From: Bowmanville Ontario
I just tried to remove the relay and it is bolted through the hosing, problem is the nuts are moving so now what happens to the nut when I get the bolt out, does it fall into my circulating fan?
I tried to see the colors of the wires, but they all look black from the top looking down.
Ken
Le Mans Master
Joined: Aug 2006
Posts: 7,426
Likes: 1,559
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Pete, how did you jumper your relay? Can you jumper it from the outside?
I just tried to remove the relay and it is bolted through the hosing, problem is the nuts are moving so now what happens to the nut when I get the bolt out, does it fall into my circulating fan?
I tried to see the colors of the wires, but they all look black from the top looking down.
Ken
I just tried to remove the relay and it is bolted through the hosing, problem is the nuts are moving so now what happens to the nut when I get the bolt out, does it fall into my circulating fan?
I tried to see the colors of the wires, but they all look black from the top looking down.
Ken
That will help you get to the wires.
Then connect the 12 light green/black to 12 purple.
The override relay is shown on the lower left in the diagram above.
Last edited by Peterbuilt; Sep 24, 2013 at 08:44 PM.
Le Mans Master
Joined: Aug 2006
Posts: 7,426
Likes: 1,559
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Then I'm not sure who did what before you.
A picture might help.
If you have a 74 service manual look at 12-64.
A picture might help.
If you have a 74 service manual look at 12-64.
Le Mans Master
Joined: Aug 2006
Posts: 7,426
Likes: 1,559
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Let's start over.
The relay is missing already so lets guess that it has been bypassed. That can be verified by testing the 4 holes but that test is 2 pages long so lets look elsewhere for now.
The ignition switch (not the key switch) is held to the steering column with 2 screws.
If it got loose it may be an easy fix so lets check there first. It's on the upper side and at the lower end.
Then lets look for a bad adjustment at the NSS.
The switch can be out of adjustment or shorted out or a wire could be pinched.
The ignition switch (not the key switch) is held to the steering column with 2 screws.
If it got loose it may be an easy fix so lets check there first. It's on the upper side and at the lower end.
Then lets look for a bad adjustment at the NSS.
The switch can be out of adjustment or shorted out or a wire could be pinched.
Le Mans Master
Joined: Aug 2006
Posts: 7,426
Likes: 1,559
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Here's an index for the AIM. Thanks to Mr. Birkes for publishing it. My AIM is from a different vendor so the page number is off by a few pages. Ex:Steering column is listed as p350 but is on 347. Still brings me close enough.
http://www.birkes.com/corvette/sprea...Alpha_Sort.htm
Mr. Jim Shea is the expert on steering columns and his papers are here:
http://jimshea.corvettefaq.com/
Look under Corvette steering.
The switch is here:
Hope you are young and flexible or have a good Chiropractor.
http://www.birkes.com/corvette/sprea...Alpha_Sort.htm
Mr. Jim Shea is the expert on steering columns and his papers are here:
http://jimshea.corvettefaq.com/
Look under Corvette steering.
The switch is here:
Hope you are young and flexible or have a good Chiropractor.
Thread Starter
Burning Brakes
Joined: Apr 2012
Posts: 1,084
Likes: 96
From: Bowmanville Ontario
Ah no, 50 and getting more un-flexible by the day.
Can't I just bypass the relay connector like VetteFixr did?
This is probably related to the fact that I no longer have the original Seat Belt receivers installed and therefor the wire that used to come from them to the circuit is not connected.
Can't I just bypass the relay connector like VetteFixr did?
This is probably related to the fact that I no longer have the original Seat Belt receivers installed and therefor the wire that used to come from them to the circuit is not connected.