1990 - 1995 Corvette ZR-1

The following are part numbers for the various emblems on a ZR-1. Always check with your local Chevrolet dealer for the latest part number for these items:"CORVETTE" Emblem - Rear Bumper10153697 --- 1990 Turquoise Metallic (42U)10172314 --- 1991... Read More

Type: NippondensoDisplacement: LT5 - 10.0 cubic inches L98 - 12.7 cubic inches Read More

Subject: NO START CONDITION (STARTER CORROSION-REPLACE STARTER) Model and Year: 1990-1992 Corvette, Engine Code J (LT5) Source: Chevrolet Service Bulletin Bulletin Number: 92-307-6 - (09/21/1992) CONDITION: Some ZR1 Corvettes may exhibit... Read More

Subject: ENGINE SERVICE PROGRAM - LT5 5.7L CORVETTE ZR1 ENGINE (VIN CODE J)Model and Year: 1990-92 CORVETTE ZR1Source: Chevrolet Service BulletinBulletin Number: 92-228-6 - (06/01/1992) THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO.... Read More

Subject: ENGINE NOISE-INSTALL BUSHING 5.7L V8 (RPO LT5)Model and Year: 1990-92 CORVETTE WITH 5.7L ENGINE (RPO LT5) AND MANUAL TRANSMISSIONSource: Chevrolet Service BulletinBulletin Number: 92-230-6 - (06/15/1992) Condition: Some owners of 1990-92... Read More

Subject: HARD STARTING DURING A HOT RESTART, INCREASE IN IDLE SPEEDS, AND IDLE FLUCTUATION (REPLACE MEM-CAL) Model and Year: 1990-91 CHEVROLET CORVETTE WITH 5.7L ENGINE (VIN J - RPO LT5) AND MANUAL 6-SPEED TRANSMISSION (ML9)Source: Chevrolet Service... Read More

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

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

Subject: TRANS. EXCHANGE PROGRAM 6 SPEED M/T (ML9)Model and Year: 1989-91 CORVETTE ZF 6-SPEED MANUAL TRANSMISSION WITH ML9 OPTIONSource: Chevrolet Service BulletinBulletin Number: 91-89-7B - (10/31/1990) TO: ALL CHEVROLET DEALERS THIS BULLETIN... Read More

From Jim Ingle, GM Powertrain Engineer:"The problem you're most likely experiencing is a noisy crankshaft pilot bushing. There is a later design released for service that tends to retain grease better than the one you have and therefore doesn't... Read More