Rearend identification

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m (Reverted edits by 68.203.28.254 (talk) to last revision by Cobalt327)
(→8.5 inch 10-bolt)
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====8.5 inch 10-bolt====
 
====8.5 inch 10-bolt====
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Sometimes referred to as the "corporate 10-bolt", the GM 8.5" 10-bolt rearend began production in 1971 to replace the 8.2" and 12-bolt rearends. There was simultaneous use of the 8.2" and 8.5" rearends during the changeover period, like in the Nova. Has a 10 bolt cover as well as 10 bolts securing the ring gear.
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Sometimes referred to as the "corporate 10-bolt", the GM 8.5" 10-bolt rearend began production in 1971 to replace the 8.2" and 12-bolt rearends. There was simultaneous use of the 8.2" and 8.5" rearends during the changeover period, like in the Nova. Has a 10 bolt cover as well as 10 bolts securing the ring gear. Ring gear bolts are 7/16 - 20 LH threads (also shared with the 7.5/7.625").  
  
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The 8.5" 10-bolt GM rearend has a 30 spline pinion, uses C-clips, and could have 28 or 30 spline axles depending on the year. It uses a 1-1/4" pinion nut.
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The 8.5" 10-bolt GM rearend has a 30 spline pinion, uses C-clips, and could have 28 or 30 spline axles depending on the year (30 spline axles were used after 1988). 4 wheel drive 8.5" front differentials manufactured between 1977-91 share the same differential gears, bearings, and pinion seals but has a modified housing and cover which has an indentation to clear suspension travel. It uses a 1-1/4" pinion nut. Ring gear diameter was increased to 8.6" when used with the GMT800 platform light duty trucks (1999-06 Silverado/Sierra).  
 
<table  bgcolor="#F9F9F9" table border="1" cellpadding="2" cellspacing="0"><tr> <td>                                Apollo:&nbsp;&nbsp;1973 - 1975&nbsp;&nbsp;
 
<table  bgcolor="#F9F9F9" table border="1" cellpadding="2" cellspacing="0"><tr> <td>                                Apollo:&nbsp;&nbsp;1973 - 1975&nbsp;&nbsp;
 
                                 </td><td>                                    Bel Air:&nbsp;&nbsp;1970 - 1975&nbsp;&nbsp;
 
                                 </td><td>                                    Bel Air:&nbsp;&nbsp;1970 - 1975&nbsp;&nbsp;
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</tr><tr>
 
</tr><tr>
 
<td>                                    C10 1/2 Ton (2WD):&nbsp;&nbsp;1979 - 1987&nbsp;&nbsp;
 
<td>                                    C10 1/2 Ton (2WD):&nbsp;&nbsp;1979 - 1987&nbsp;&nbsp;
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                                 </td><td>                                    C15/ C1500 1/2 Ton (2WD):&nbsp;&nbsp;1979 - 1990&nbsp;&nbsp;
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                                 </td><td>                                    C15/ C1500 1/2 Ton (2WD):&nbsp;&nbsp;1979 - present&nbsp;&nbsp;
 
                                 </td>
 
                                 </td>
 
</tr><tr>
 
</tr><tr>
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                                 </td>
 
                                 </td>
 
</tr><tr>
 
</tr><tr>
−
<td>                                    Caprice:&nbsp;&nbsp;1970 - 1996&nbsp;&nbsp;
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<td>                                    Caprice:&nbsp;&nbsp;1970 - 1996 (includes 94-96 Impala SS and 9C1 police package)&nbsp;&nbsp;
 
                                 </td><td>                                    Catalina:&nbsp;&nbsp;1970 - 1981&nbsp;&nbsp;
 
                                 </td><td>                                    Catalina:&nbsp;&nbsp;1970 - 1981&nbsp;&nbsp;
 
                                 </td>
 
                                 </td>
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                                 </td>
 
                                 </td>
 
</tr><tr>
 
</tr><tr>
−
<td>                                    Cutlas:&nbsp;&nbsp;1985 - 1987&nbsp;&nbsp;
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<td>                                    Cutlass:&nbsp;&nbsp;1985 - 1987 (442 package)&nbsp;&nbsp;
 
                                 </td><td>                                    El Camino:&nbsp;&nbsp;1971 - 1976&nbsp;&nbsp;
 
                                 </td><td>                                    El Camino:&nbsp;&nbsp;1971 - 1976&nbsp;&nbsp;
 
                                 </td>
 
                                 </td>
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                                 </td>
 
                                 </td>
 
</tr><tr>
 
</tr><tr>
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<td>                                    Impala:&nbsp;&nbsp;1971 - 1988&nbsp;&nbsp;
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<td>                                    Impala/Caprice:&nbsp;&nbsp;1971 - 1996 (77-96 B, C, and D platform for station wagons, diesels, 9C6 (taxicab) and 9C1 police package&nbsp;&nbsp;
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                                 </td><td>                                    K10/ K1500 1/2 Ton (4WD):&nbsp;&nbsp;1979 - 1988&nbsp;&nbsp;
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                                 </td><td>                                    K10/ K1500 1/2 Ton (4WD):&nbsp;&nbsp;1979 - present&nbsp;&nbsp;
 
                                 </td>
 
                                 </td>
 
</tr><tr>
 
</tr><tr>
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<td>                                    K15/ K1500 1/2 Ton (4WD):&nbsp;&nbsp;1979 - 1988&nbsp;&nbsp;
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<td>                                    K15/ K1500 1/2 Ton (4WD):&nbsp;&nbsp;1979 - present&nbsp;&nbsp;
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                                 </td><td>                                    K5 Blazer (4WD):&nbsp;&nbsp;1979 - 1991&nbsp;&nbsp;
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                                 </td><td>                                    K5 Blazer (4WD):&nbsp;&nbsp;1979 - 1991 (1979-82 are overlap years - also applicable to C/K 10 series incl. Suburban&nbsp;&nbsp;
 
                                 </td>
 
                                 </td>
 
</tr><tr>
 
</tr><tr>
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                                 </td><td>                                    Skylark:&nbsp;&nbsp;1970 - 1972&nbsp;&nbsp;
 
                                 </td><td>                                    Skylark:&nbsp;&nbsp;1970 - 1972&nbsp;&nbsp;
 
                                 </td>
 
                                 </td>
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</tr><tr>
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                </tr><tr>
 
<td>                                    Skylark:&nbsp;&nbsp;1975 - 1979&nbsp;&nbsp;
 
<td>                                    Skylark:&nbsp;&nbsp;1975 - 1979&nbsp;&nbsp;
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                                 </td><td>                                    Sonoma:&nbsp;&nbsp;1994 - 1998&nbsp;&nbsp;
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                                 </td><td>                                    S10,Sonoma:&nbsp;&nbsp;1995 - 2003 (4WD with ZR2 option, S10 SS, Xtreme, and 4.3L trucks with a manual transmission option&nbsp;&nbsp;
 
                                 </td>
 
                                 </td>
 
</tr><tr>
 
</tr><tr>

Revision as of 16:34, 1 June 2015

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