Torque Converter Clutch Manual Switch...??
Thread Starter
Advanced
Joined: Oct 2017
Posts: 57
Likes: 8
From: Hawaii
Torque Converter Clutch Manual Switch...??
Sadly, the TCC in my 93 kicks in and out quite frequently in my local area (even in 3rd or "D" if you prefer).....lots of hills and 35-45mph speedlimits.
Im aware that the TCC is a "weak link" in the 700R4/4L60 and would like to save some wear and tear on it by manually selecting it's useage.
Has anyone wired in a switch to do this?
Aloha.
Im aware that the TCC is a "weak link" in the 700R4/4L60 and would like to save some wear and tear on it by manually selecting it's useage.
Has anyone wired in a switch to do this?
Aloha.
Race Director
Joined: Apr 2003
Posts: 17,694
Likes: 1,666
From: moraga ca
I do that on my bracket car. Wot lockup after the 2-3 shift. I have a 5 disk clutch in my converter. Simply ground the tcc wire going into the tranny with a console switch. When my car was on the street, I had the same setup and used the converter lockup as a 5th gear on the freeway.
Racer
Joined: Sep 2017
Posts: 452
Likes: 50
From: Marianna Fl
I don't see why you wouldn't be able to. I would probably put the switch in as an interrupter to disable the lockup for areas like this instead of forcing it on. forcing it may cause premature wear to the transmission internals during shifts under load.
Supporting Vendor
Joined: Oct 2004
Posts: 761
Likes: 67
Bin
Sadly, the TCC in my 93 kicks in and out quite frequently in my local area (even in 3rd or "D" if you prefer).....lots of hills and 35-45mph speedlimits.
Im aware that the TCC is a "weak link" in the 700R4/4L60 and would like to save some wear and tear on it by manually selecting it's useage.
Has anyone wired in a switch to do this?
Aloha.
Im aware that the TCC is a "weak link" in the 700R4/4L60 and would like to save some wear and tear on it by manually selecting it's useage.
Has anyone wired in a switch to do this?
Aloha.
Race Director
Joined: Apr 2003
Posts: 17,694
Likes: 1,666
From: moraga ca
For years I used to lock the converter up at the track after the 1-2 shift. It was worth a tenth in the quarter, but you're right, brutal on clutches. I stopped that after I broke a hardened input shaft on my Rossler built 4l60e. I now have a billet input shaft and I lock up the converter after the 2-3 shift. Tranny is over 4 years old now and happy. For a street car, I would lock the converter when the tranny was in 4th gear on the freeway. Never in any other gear.
Last edited by 383vett; Nov 18, 2017 at 02:03 PM.
Intermediate
Joined: Jun 2013
Posts: 33
Likes: 3
From: Minden Nevada
The OP isn't asking about manual lockup in other gears, or when the ECM doesn't command lockup. He wants to disable ECM-controlled lockup.
To install a TCC-disable switch in a 93:
At the brake pedal, one of the switches has a connector with a purple and a pink/blk wire in it. Cut the purple wire, and insert a SPST switch inline. With the switch = ON, operation normal (ECM-controlled). With the switch = OFF, no lockup.
To install a TCC-disable switch in a 93:
At the brake pedal, one of the switches has a connector with a purple and a pink/blk wire in it. Cut the purple wire, and insert a SPST switch inline. With the switch = ON, operation normal (ECM-controlled). With the switch = OFF, no lockup.
Team Owner
Joined: Sep 2003
Posts: 25,330
Likes: 2,722
The OP isn't asking about manual lockup in other gears, or when the ECM doesn't command lockup. He wants to disable ECM-controlled lockup.
To install a TCC-disable switch in a 93:
At the brake pedal, one of the switches has a connector with a purple and a pink/blk wire in it. Cut the purple wire, and insert a SPST switch inline. With the switch = ON, operation normal (ECM-controlled). With the switch = OFF, no lockup.
To install a TCC-disable switch in a 93:
At the brake pedal, one of the switches has a connector with a purple and a pink/blk wire in it. Cut the purple wire, and insert a SPST switch inline. With the switch = ON, operation normal (ECM-controlled). With the switch = OFF, no lockup.
Most are very happy with either the PROM modification to maybe 50mph that's been mentioned or the switch. $$$, time and talent sometimes dictates choice.
This is from a '93 FSM -
Last edited by WVZR-1; Nov 19, 2017 at 08:49 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Thread Starter
Advanced
Joined: Oct 2017
Posts: 57
Likes: 8
From: Hawaii
The OP isn't asking about manual lockup in other gears, or when the ECM doesn't command lockup. He wants to disable ECM-controlled lockup.
To install a TCC-disable switch in a 93:
At the brake pedal, one of the switches has a connector with a purple and a pink/blk wire in it. Cut the purple wire, and insert a SPST switch inline. With the switch = ON, operation normal (ECM-controlled). With the switch = OFF, no lockup.
To install a TCC-disable switch in a 93:
At the brake pedal, one of the switches has a connector with a purple and a pink/blk wire in it. Cut the purple wire, and insert a SPST switch inline. With the switch = ON, operation normal (ECM-controlled). With the switch = OFF, no lockup.
EXACTLY WHAT I WANTED TO KNOW !
You nailed it!
Some of these guys just like to type.......
ALOHA !