Corvette Action Center Knowledgebase

1982 - 1991 Corvette: Service Bulletin: Transmission Stuck in First Gear

Aug 1, 2014 1982 corvette, c4 corvette, service bulletin, transmission, stuck, gear, first gear, hydra-matic, 4l60, upshift, 91-371-7A 0 1 3299 5/5 (1 Vote)

Subject: TRANSMISSION STUCK IN FIRST GEAR Model and Year: 1982-91 CAPRICE, CAMARO AND CORVETTE 1982-91 C/K, G, S/T' 1985-91 M VAN 1987-91 RN AND 1990-91 L VAN WITH 4L60 AUTOMATIC TRANSMISSION Source: Chevrolet Service Bulletin Bulletin... Read More

1982 - 1993 Corvette: Service Bulletin: Buzzing Noise at Idle

Aug 1, 2014 1982 corvette, c4 corvette, service bulletin, buzz, buzzing, noise, idle, 93-29-7A, hydra-matic, 4l60, transmission, md8, rpo md8 0 0 897 0/5 (0 Vote)

Subject: BUZZING NOISE AT IDLE (INSTALL PRESSURE REGULATOR VALVE) Model and Year: 1982-93 CAPRICE, CAMARO AND CORVETTE 1982-93 C/K, R/V, S/T, M/L AND G TRUCKS WITH 4L60 AUTOMATIC TRANSMISSION Transmission Applications: 1982-1993 HYDRA... Read More

1974 - 1975 Corvette: Service Bulletin: Stripped Speedometer Driven Gear, 1974-1975 Corvette with 4-Spd. Transmission

Aug 1, 2014 1974 corvette, 1975 corvette, service bulletin, stripped, speedometer, driven, gear, 4-speed, 4-spd, transmission, 75-T-3 0 0 929 0/5 (0 Vote)

Model Year: 1974-1975Subject: Stripped Speedometer Driven Gear, 1974-1975 Corvette with 4-Spd. TransmissionSource: Chevrolet Dealer Service Technical BulletinNumber: 75-T-3Date: Jan. 17, 1975TO: ALL CHEVROLET DEALERSOn 1974 and 1975 Corvettes with 4... Read More

1984 - 1992 Corvette: Service Bulletin: Intermittent Transmission Downshift / Slip Diagnosis

Jul 29, 2014 c4 corvette, service bulletin, intermittent, transmission, downshift, slip, diagnosis, automatic transmission, 92-42-7A, slipping 0 0 862 2/5 (1 Vote)

Subject: INTERMITTENT TRANSMISSION DOWNSHIFT, SLIP OR BUSY/CYCLING TCC Model and Year: 1983-92 ALL PASSENGER CARS AND TRUCKS WITH AUTOMATIC TRANSMISSIONSource: Chevrolet Service BulletinBulletin Number: 92-42-7A - (11/07/1991) Some owners may comment... Read More

1984 - 1987 Corvette: Technical Article: Rebuilding the Doug Nash 4+3 Overdrive Unit

Jul 29, 2014 1984 corvette, 1985 corvette, 1986 corvette, 1987 corvette, tech article, technical article, rebuild, rebuilding, doug nash, 4+3, transmission, overdrive unit, david fulcher 1 4 12778 4.88/5 (8 Votes)

Nash Thrash Rebuilding the Doug Nash 4+3 Overdrive Unit. by David Fulcher 1984-88 manual shift Corvettes came through with the Doug Nash 4+3 overdrive transmission. The '84 and '85 units were almost identical, with the only difference being a... Read More

1985 Corvette: Service Bulletin: Low Idle Speed and Launch Stalls

Jul 29, 2014 1985 corvette, service bulletin, low idle, low idle speed, launch, stalls, transmission, manual transmission, ecm calibration, 85-185, Section 6E 0 0 1029 0/5 (0 Vote)

Subject: Low Idle Speed and Launch StallsModel and Year: 1985 CorvetteSource: Chevrolet Dealer Sevice BulletinBulletin Number: 85-186, Section 6EDate: Mar., 1986 TO: ALL CHEVROLET DEALERS Some 1985 Corvettes with manual transmission may... Read More

1987 - 1991 Corvette: Service Bulletin: New 3-4 Club Plates for 4L60 Transmissions

Jul 29, 2014 1987 corvette, 1988 corvette, 1989 corvette, 1990 corvette, 1991 corvette, service bulletin, 304 club plates, 4l60, transmission, automatic transmission, 91-112-7A 0 0 694 0/5 (0 Vote)

Subject: NEW 3-4 CLUTCH PLATES (STEEL) 4L60 TRANSMISSIONSModel and Year:1987-91 CAPRICE, CAMARO, CORVETTE WITH 4L60 AUTOMATIC TRANSMISSION1987-91 C/K, G, M, RN, S/T TRUCK1990-91 L TRUCK WITH 4L60 AUTOMATIC TRANSMISSIONSource: Chevrolet Service... Read More

1987 - 1991 Corvette: Service Bulletin: 4L60 Low & Reverse Clutch New Plate Available

Jul 29, 2014 1987 corvette, 1988 corvette, 1989 corvette, 1990 corvette, 1991 corvette, service bulletin, 4l60, transmission, automatic transmission, low clutch, reverse clutch, clutch plate, 91-186-7A 0 0 1459 0/5 (0 Vote)

Subject: 4L60 LOW & REVERSE CLUTCH NEW WAVE PLATE IS AVAILABLE Model and Year: 1987-91 CAPRICE, CAMARO, CORVETTE AND 1987-91 C/K, RN, S/T TRUCKS, G, M VANS AND 1990-91 L VAN WITH 4L60 AUTOMATIC TRANSMISSION Source: Chevrolet Service... Read More

1988 - 1993 Corvette: Service Bulletin: Click/Whine in 3rd/4th Gear

Jul 29, 2014 1988 corvette, 1989 corvette, 1990 corvette, 1991 corvette, 1992 corvette, 1993 corvette, service bulletin, click, whine, transmission, 4l60, 4l60-e, hydra-matic, 93-228-7A 0 0 735 0/5 (0 Vote)

Subject: CLICK/WHINE IN 3RD/4TH GEAR INST. NEW CLUTCH FIBER PLATESModel and Year:1988-93 CAPRICE, CAMARO AND CORVETTE 1988-93 C/K, RN, S/T, M AND G TRUCKS 1990-93 L VANSource: Chevrolet Service BulletinBulletin Number: 93-228-7ATHIS BULLETIN CANCELS... Read More

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 6320 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

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