C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Lockup

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Old Oct 31, 2021 | 03:37 PM
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Eduardo L98 1991's Avatar
Eduardo L98 1991
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From: Acapulco Guerrero
Default Lockup

automatic L98 1991

HI,
Please help

I believe I have a lockup problem, at highway on 4 gear the shift light mantains on

the trans is recently rebuilt (transgo -great), new converter

how can I test lockup signal to the trans, if I remember correctly jumping pins A & F on the ALDL connector., then I removed the trans connector, what I need to check this ? 12v ?

what about the brake pedal swicth ?

hope you can help me on test procedure

thanks in advance


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Old Oct 31, 2021 | 06:58 PM
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A quick test is to go for a ride let all temperatures get up to operational, then on flat road or slightly graded. At around 45/50 MPH Break lightly enough to get brake lights on left and hold throttle steady with right.

If lock up is working the RPMs should jump, release brake RPMs should drop and car should lug a bit
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