How does one turn off Lockup?

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Jan 30, 2009 | 05:41 PM

freedog81

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From: orangeburg SC

How does one turn off Lockup?

The lockup on my tq converter is slipping how can I turn it off until I have time to fix it?... I know it will hurt mileage and more heat etc I just need it off.

thanks

Jan 30, 2009 | 06:38 PM

Muffin

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From: Merritt Ils Fl

Unplug it. Plug is located on the driver side of the transmission in the middle. Plug at the end is speed sensor.

Jan 30, 2009 | 07:00 PM

molested84

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From: CowTown Arizona

Couldn't you just place the transmission selection lever in "Drive" instead of "OverDrive"?

Jan 30, 2009 | 07:09 PM

Team Owner

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From: Phila., PA burbs

Quote:

Originally Posted by molested84

Couldn't you just place the transmission selection lever in "Drive" instead of "OverDrive"?

I don't think that will work. At the track I run my car in "Drive" and the converter still locks up.

Jan 30, 2009 | 08:10 PM

65Z01

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From: SE NY

Cruise-In II Veteran

Quote:

Couldn't you just place the transmission selection lever in "Drive" instead of "OverDrive"?

Won't work with a 700R/4; on the dyno in 3rd gear the TCC locked up at ~125mph so hard the operator thought it made a gear change...

Jan 30, 2009 | 08:13 PM

Iroc57

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From: Warwick RI

Quote:

Originally Posted by TA

I don't think that will work. At the track I run my car in "Drive" and the converter still locks up.

It will lock in drive as well

Jan 30, 2009 | 08:25 PM

383vett

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From: moraga ca

Intercept the tcc wire between the ecm and the transmission harness (I think it's a white wire). I have mine connected to a switch on the console and lock up the converter manually. You can just cut the wire and later splice it together.

Jan 30, 2009 | 09:33 PM

TX VET MAN

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From: California

When you say the converter "locks up"...does that mean it shifts into overdrive?

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Jan 30, 2009 | 10:40 PM

Aardwolf

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From: WI

Slipping?

At a cruise around say 55 MPH just press the brake lightly and don't move the gas, your RPM should go up 200. Very easy to check.

Jan 30, 2009 | 11:31 PM

#10

rodj

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From: Australia

Quote:

Originally Posted by 2006 Texas Corvette

When you say the converter "locks up"...does that mean it shifts into overdrive?

No ; lockup is when the clutch in the convertor locks , not when it shifts into 4th (O/d ).

Jan 30, 2009 | 11:33 PM

#11

rodj

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From: Australia

Quote:

Originally Posted by 383vett

Intercept the tcc wire between the ecm and the transmission harness (I think it's a white wire).

One of the 2 pairs of wires on the brake pedal switch is for the TCC .
Disconnect one wire; if your stoplamps don't work anymore you have the wrong one.

Jan 31, 2009 | 12:55 AM

#12

Weav's Vet

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From: Sandhills of North Carolina

Not meaning to hijack but......what would cause a converter to lock, unlock and then not lock again in normal driving on my '96? Stop and cut the car off and it works fine.

Jan 31, 2009 | 04:02 AM

#13

freedog81

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From: orangeburg SC

No problem on the hijacking... I think it is worth it for the additional knowledge on the transmission. I will try the brake switch unplugging first and if that dosent work then I will unplug it at the transmission.

Jan 31, 2009 | 07:24 AM

#14

rodj

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From: Australia

Quote:

Originally Posted by freedog81

I will try the brake switch unplugging first and if that dosent work then I will unplug it at the transmission.

It will work if you pull the correct one TCC signal runs from ECM through switch to trans.
Switch is normally closed letting convertor lock up until you brake

Jan 31, 2009 | 07:47 AM

#15

Team Owner

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From: Phila., PA burbs

Quote:

Originally Posted by Muffin

Unplug it. Plug is located on the driver side of the transmission in the middle. Plug at the end is speed sensor.

This will work, although you'll also lose your speedometer and odometer when unplugged.

Jan 31, 2009 | 08:00 AM

#16

Muffin

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From: Merritt Ils Fl

Quote:

Originally Posted by TA

This will work, although you'll also lose your speedometer and odometer when unplugged.

There are two plug-ins on the 700R4. One at the tailstock area is speed related.One in the center,more or less, is TCC lock up and 4th gear signal. Can be bypassed by cutting wires but why cut anything if the repair isn't going to take forever?

Jan 31, 2009 | 09:59 AM

#17

freedog81

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From: orangeburg SC

I want to avoid cutting any wires.. the car is my dd and I just don't have the time right now to deal with it and if it will hold on for about a week I should be caught up enough to get to it.

thanks everyone

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