Corvette Action Center Knowledgebase

1989 - 1996 Corvette: Differences between First and Second Generation ZF 6-Speed Transmissions

Jul 29, 2014 c4 corvette, differences, first generation, second generation, zf, 6-speed, transmission, manual transmission 0 1 6319 4.22/5 (18 Votes)

From ZF regarding ZF transmission noise and differences between the ZF used in early and late ZR-1s - July 12, 2000: "All S6-40 transmissions installed in the C4 Corvette contain 100% helical gears. In fact, all of the gearboxes ZF produces for... Read More

1989 - 1996 Corvette: Service Bulletin: Information on Corvette ZF 6-Speed Manual Transmission Service Procedure

Jul 29, 2014 c4 corvette, service bulletin, zf 6-speed, manual transmission, transmission, service, procedure, 77-72-04 0 1 5964 5/5 (3 Votes)

Model Year: 1989-96 CHEVROLET CORVETTE WITH ZF 6-SPEED MANUAL TRANSMISSION (ML9) Subject: INFORMATION ON CORVETTE ZF 6-SPEED MANUAL TRANSMISSION SERVICE PROCEDURE Source: Chevrolet Dealer Service Bulletin Bulletin Number: 77-72-04 ... Read More

1996 - 1999 Corvette: Service Bulletin: No Reverse, Second Gear, or Fourth Gear

Jul 28, 2014 c4 corvette, c5 corvette, service bulletin, no reverse, second gear, fourth gear 0 0 919 0/5 (0 Vote)

Subject: No Reverse, Second Gear, or Fourth Gear (Replace the Reaction Sun Shell)Source: Chevrolet Dealer Technical Service BulletinNumber: 00-07-30-022Models: 1996 Buick Roadmaster1996 Cadillac Fleetwood1996 Caprice1996-99 Chevrolet Camaro,... Read More

1996 - 2000 Corvette: Service Bulletin: Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set

Jul 28, 2014 c4 corvette, c5 corvette, service bulletin, harsh, upshift, ses, mil, cel, illuminated, dtc, p1870, 01-07-30-023B 0 0 1839 5/5 (1 Vote)

Subject: Harsh 1-2 Upshift, SES, MIL, or CEL Illuminated, DTC P1870 Set (Replace Valve Body)Source: Chevrolet Dealer Technical Service BulletinNumber: 01-07-30-023BModels:1996 Buick Roadmaster1996 Cadillac Fleetwood1999-2000 Cadillac Escalade1996... Read More

1984 - 1989 Corvette: Digital Dash Cluster Repair

Jul 28, 2014 c4 corvette, digital, dash, cluster, repair, speedometer 1 0 2643 5/5 (3 Votes)

From Bob Golden: My name is Bob Golden and my home e-mail is <withheld>. I wanted you to now how I enjoyed reading your publication on the repairs of the famous digital cluster. For 20 years I was the General manager at Speedometer... Read More

1984 - 1996 Corvette: Speedometer Gear Applications and Part Numbers

Jul 28, 2014 c4 corvette, speedometer, gear, applications, part numbers 0 1 7377 5/5 (5 Votes)

TransmissionGear RatioDrive GearColor# of TeethDriven GearColor# of TeethVehicle Speed Sensor 1984 MD8 with Export (VB4, VD1, VE1, VT7) 3.07 8640517 Red 17 25513047 Black 40 25007308 MD8 except Export (VB4, VD1, VE1, VT7) 3.07 8640517 Red 17... Read More

1984 - 1990 Corvette: Service Bulletin: Underhood Lamps Inoperative or Staying On

Jul 28, 2014 c4 corvette, service bulletin, underhood, under hood, lamps, lights, inoperative, staying on, 90-248-8B 0 0 948 0/5 (0 Vote)

Model Year: 1984-1990 Y-Car Subject: Underhood Lamps Inoperative or Staying On Source: Chevrolet Dealer Service Bulletin Bulletin Number: 90-248-8B Date: 05-07-1990 Condition: Underhood lamps that are inoperative, or that stay on... Read More

1985 - 1991 Corvette: ECM Codes

Jul 28, 2014 c4 corvette, ecm, codes 1 6 11554 4.19/5 (16 Votes)

Code #12: Normal No Codes.Code #13: Open Oxygen Sensor Circuit.Code #14: Coolant Sensor Circuit Low.Code #15: Coolant Sensor Circuit High.Code #21: Throttle Position Sensor High.Code #22: Throttle Position Sensor Low.Code #23: Manifold Air... Read More

1986 - 1991 Corvette: Service Bulletin: Multec Fuel Injectors / Cleaning Information

Jul 28, 2014 c4 corvette, service bulletin, multec, fuel, injector, injectors, cleaning, information 0 0 2452 1/5 (1 Vote)

Subject: MULTEC FUEL INJECTORS/CLEANING INFORMATION Model and Year:1986-90 CELEBRITY1986-91 CAMARO, CAVALIER, CORVETTE1987-91 CORSICA, BERETTA1990-91 LUMINA, STORMSource: Chevrolet Service BulletinBulletin Number: 91-312-6E - (05/15/1991) THIS... Read More

1990 - 1996 Corvette: Oil Life Monitor: Reset the Engine Oil Life Monitor

Jul 28, 2014 c4 corvette, oil, engine oil, oil life, monitor, reset, resetting, procedure, how-to, how to 1 33 26121 3.88/5 (34 Votes)

Overview: The 1990 to 1996 Corvettes are equipped with an Engine Oil Life Monitor. The Central Control Module (CCM) calculates the lifespan of the engine oil by measuring engine rpm, and oil temperature over time. Regardless of... Read More

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