TRANSMISSION FAILS TO COME OUT OF LOCK UP CAUSING CAR TO STALL AND SHIFT ERRATICALLY WHEN RESTARTED. I FAILURE ANALIZED THE PSOLENOID WHICH WAS REMOVED AND FOUND THE MAL-FUNCTION TO BE CAUSED BY A BLISTERING OF THE PHENALIC CORE MATERIAL DUE TO OVERHEATING THUS CAUSING THE SOLENOID PISTON TO STICK OPEN AND NOT ALLOWING THE FEFL…
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TRANSMISSION FAILS TO COME OUT OF LOCK UP CAUSING CAR TO STALL AND SHIFT ERRATICALLY WHEN RESTARTED. I FAILURE ANALIZED THE PSOLENOID WHICH WAS REMOVED AND FOUND THE MAL-FUNCTION TO BE CAUSED BY A BLISTERING OF THE PHENALIC CORE MATERIAL DUE TO OVERHEATING THUS CAUSING THE SOLENOID PISTON TO STICK OPEN AND NOT ALLOWING THE FEFLOW OF FLUID TO THE PROPER NON LOCK UP AREAS. I AM NOT ALONE .... THIS IS A FACTORY DESIGN DEFECT IN THE 400 TRANSMISSION. MY SOLUTION WAS TO DECREASE THE POWER ACROSS THE SOLENOID BY 20% BY ADDING A 4 OHM 1 WATT RESISTOR IN THE POWER FEED CIRCUITRY FROM THE NORMALLY CLOSED BRAKE SWITCH POWER FEED. ACTUALLY , GM HAS AN INCORRECT DESIGN HERE AND PERHAPS SHOULD HAVE USED A TEFLON CORE MATERIAL WHICH WOULD NOT HAVE BLISTERED OR HAD A DIFFERENT POWER TYPE UNIT WHICH WOULD NOT HAVE BEEN DEGRADED BY THE HEAT. PROBABLY NOT MANY 96'S AROUND BUT AT OVER A HUNDRED BUCKS A FIX AND POSSIBLE ACCIDENTS .... YOU MIGHT LOOK INTO. THANKS
NHTSA ODI #703845
Mileage unknown · Jul 13, 1995
Power Train
IT'S A MODEL 200 4R TURBO HYDRA 4 SPEED OVERDRIVE THE RINGS ARE NOT HARDENED. *AK
THE PUSH PULL HEADLIGHT SWITCH MAY HAVE ELECTRICAL CONTACTS WHICH ALLOW AN INTERMITTENT HEADLIGHT CIRCUIT CAUSING HEADLIGHT TO FLICKER OR SUDDENLY GO OUT. CONSEQUENCE OF DEFECT: SUDDEN LOSS OF THE HEADLIGHTS UNDER SEVERE WEATHER OR NIGHTTIME DRIVING CONDITIONS COULD REDUCE DRIVER VISIBILITY WHICH MIGHT RESULT IN A VEHICLE CRASH WITHOUT PRIOR WARNING.
THE PUSH-PULL HEADLIGHT SWITCH MAY HAVE ELECTRICAL CONTACTS WHICH ALLOW AN INTERMITTENT HEADLIGHT CIRCUIT CAUSING HEADLIGHT TO FLICKER OR SUDDENLY GO OUT. CONSEQUENCE OF DEFECT: SUDDEN LOSS OF THE HEADLIGHTS UNDER SEVERE WEATHER OR NIGHTTIME DRIVING CONDITIONS COULD REDUCE DRIVER VISIBILITY WHICH MIGHT RESULT IN A VEHICLE CRASH WITHOUT PRIOR WARNING. NOTE: ALSO, SEE NHTSA CAMPAIGN NUMBER 86V131000.
Consequence & remedy
Consequence: Not supplied
Remedy: REPLACE HEADLIGHT SWITCH AS NECESSARY.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
3
PE89145 · Parking Brake Cable
Opened Jul 21, 1989 · Closed Sep 22, 1989
Status: closed (inferred from source dates) · Parking Brake
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PE89104 · Jammed Steering Mechanism
Opened Mar 17, 1989 · Closed May 12, 1989
Status: closed (inferred from source dates) · Steering
SUMMARY: THE OIL FILL TUBE MAY BECOME LOOSE, CAUSING IT TO FALL ANDPOSSIBLY BECOME LODGED NEAR THE STEERING GEAR.THIS MAY CAUSE THESTEERING MECHANISM TO BECOME JAMMED, RESULTING IN A LOSS OF VEHICLECONTROL.===
C89001 · Throttle NON-RETURN
Opened Mar 6, 1989 · Closed Jan 16, 1990
Status: closed (inferred from source dates) · Vehicle Speed Control:linkages
There is no summary currently available
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