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Username Post: rear axle differences and width        (Topic#359786)
johnnyreb 
Newbie
Posts: 1

Reg: 02-12-20
02-12-20 06:46 AM - Post#2786350    

Hey guys! i'm hoping some of you knowledgeable big car guys can help me. I've noticed some of the 65-70? big car axles have the mounting "ears" cast into the housing like on a Chevelle and some have brackets that weld to the axle tube and i have always wondered how to differentiate them? Perhaps i've been mistaken but I could swear I've seen 12 bolts with the "ears" that were wider than a Chevelle. i'm also wondering about the width of these rear ends...are they all the same?
This is something i've always wondered about but a situation has come up that has prompted me to ask. I'm buildinga 65 Pontiac Grand Prix and it has one of those goofy 8.875" 10 bolts. the customer wants a gear change and a posi installed but they don't make carriers and gears for these things so i'm thinking about using an Impala 12 bolt.




Edited by johnnyreb on 02-12-20 07:16 AM. Reason for edit: No reason given.

 


65_Impala 
Very Senior Member
Posts: 4397

Reg: 12-29-02
02-12-20 10:28 AM - Post#2786371    
    In response to johnnyreb

Why can't you do gears and carrier in that 8.875"? I'm pretty sure I've seen 8.875" parts for sale. Or are there different versions (old vs new) that have different availability?

The 65-70 Impala differentials do not have cast ears because none of the arms or shocks attach to the center (cast) section of the differential. They attach to the formed tubes with welded brackets.




 
sz0k30 
"11th Year" Gold Supporting Member
Posts: 452
sz0k30
Loc: Oakland Co., Michigan
Reg: 10-12-08
02-12-20 10:43 AM - Post#2786372    
    In response to 65_Impala

  • 65_Impala Said:
The 65-70 Impala differentials do not have cast ears because none of the arms or shocks attach to the center (cast) section of the differential. They attach to the formed tubes with welded brackets.




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