Rear Axle Service Parts Usage and Identification
Number: 86-107Section: 4B
Date: July 1986
Subject: REAR AXLE SERVICE PARTS USAGE AND IDENTIFICATION
Model and Year: 1984-86 CORVETTE
1ST DESIGN CARRIER:
2ND DESIGN CARRIER:
TO: ALL CHEVROLET DEALERS
When servicing the 1984-86 Corvette rear axle, it should be noted that there is a 1st and 2nd design differential carrier housing. (See attached illustration). The 2nd design carrier was an interim 1984 model year change (the cross bore was widened). To compensate for this change, the differential case bearing cup (outer race) thickness was increased.
When servicing a 1984 vehicle rear axle, determination must be made whether the axle is a 1st or 2nd design. The bearing cups are not interchangeable because of the cup thickness difference. Listed below are the part numbers of the correct combinations:
DIFFERENTIAL CASE BEARING
GM PART NUMBER MANUFACTURER'S IDENT. NUMBER
BEARING ASSY. BEARING CUP BEARING CONE
(CUP & CONE)
1ST DESIGN 7451226 LM 501310 LM 501349
2ND DESIGN 7451281 LM 501314 LM 501349
NOTICE: The P/N 14091437 differential case may be used with either the 1st or 2nd design carrier with the proper bearing cups.