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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: jay_c on December 24, 2014, 01:49:04 am

Title: 350 torque converter lockup
Post by: jay_c on December 24, 2014, 01:49:04 am
Sirs/ma'ams,

 I have a 81 c10 with a 350/350. The previous owner hacked up the wiring pretty bad and I now have a truck with the tq converter lockup wires and vacuum line that are not connected and cut. My question is do I NEED to have a converter lockup mechanism? Since they are not even connected I'm thinking of removing it unless I need it. Thanks in advance.
Title: Re: 350 torque converter lockup
Post by: 78BIG-TEN on December 24, 2014, 09:29:03 am
vacumn line should be hooked to manifold vacumn.You don't have to do the lockup,when working they can give 2-3 mpg on the highway
Title: Re: 350 torque converter lockup
Post by: LTZ C20 on December 24, 2014, 09:53:51 am
Going from not having a lock up converter to having one, I highly suggest fixing it. You will be very pleased.
Title: Re: 350 torque converter lockup
Post by: Captkaos on December 24, 2014, 11:26:39 am
It will help with mileage hooked up.

Chris Lucas
73-87chevytrucks.com
squarebody.biz

Title: Re: 350 torque converter lockup
Post by: jay_c on December 24, 2014, 04:11:27 pm
Thank you for the replies. I don't drive the truck enough to need to worry about mpg. I will remove the wiring after x-mas and post some pics since it should clean up the engine bay a little. I even bought a new brake light switch with only two prongs. This way it will look as if the TC wire was never there. Thanks again guys, Merry Christmas.
Title: Re: 350 torque converter lockup
Post by: Stewart G Griffin on January 04, 2015, 02:13:26 pm
Isn't the 350C's lockup controlled by computer?   i noticed that i have 2 wires running from the vacuum switch on the firewall going to the esc computer area?
Title: Re: 350 torque converter lockup
Post by: 78BIG-TEN on January 04, 2015, 03:03:29 pm
I was thinking from a pressure switch on right side of trans,not sure ,been a long time since I messed with one