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04-05-2010, 02:01 PM
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#1 |
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Registered User
Join Date: Jul 2009
Location: Thibodaux, LA
Posts: 479
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rear end help.
I have a Ten Bolt under my 77 2wd LWB. does anyone know if the the truck 10 bolts were 8.5 or 8.2in? I am wanting to order a limited slip but cause figure out wich it is and Im not home to tear it apart and measure. Im assuming it would be an 8.5 cause i thought the cars had the 8.2.
THe back side of my rear end case is stamped GM81 if that helps at all. Thanks guys.
__________________
"Buckle up I wanna try somethin!!" "of course it will hold!, I welded it!" 1977 c10 under knife for full rebuild, 5.3l 4l60e drive rain swap, replacement frame and green repaint |
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04-05-2010, 05:33 PM
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#3 |
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Registered User
Join Date: Jul 2007
Location: Ontario Canada
Posts: 1,006
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Re: rear end help.
^^^^^^^ what he said
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04-06-2010, 12:12 AM
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#4 |
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Registered User
Join Date: Jul 2009
Location: Thibodaux, LA
Posts: 479
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Re: rear end help.
ok now the splines/ do the trucks have the 28 or 30 splined? or did they also have the 27? i know its a guessing game till i get home and tear it apart just tryn to make an educated guess here Thanks
__________________
"Buckle up I wanna try somethin!!" "of course it will hold!, I welded it!" 1977 c10 under knife for full rebuild, 5.3l 4l60e drive rain swap, replacement frame and green repaint |
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04-06-2010, 10:01 AM
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#5 |
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Senior Member
 
Join Date: Jul 2009
Location: Hayden, Al.
Posts: 4,148
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Re: rear end help.
Depends if it is original. If it is a 8.5" rearend out of a 1987 or prior it has 28 spline axles, 1988 and newer have 30 spline axles. I haven't actually heard of a 27 spline 10 bolt.
The more I think about it though, I believe your truck should have a 12 bolt rearend under it. I recently sold a '77 LWB and it had a 12 bolt under it, and the '76 Blazer I have also has a 12 bolt. I could certainly be wrong about the application, but it is a consideration. Ed |
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04-06-2010, 11:04 AM
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#6 |
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Registered User
Join Date: Jul 2009
Location: Thibodaux, LA
Posts: 479
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Re: rear end help.
yea someone before my must have swapped it out for some reason. It is supose to have the 12 bolt. Im assuming it is a 28 spline application. Think I might have a line on a parts truck with a 12 bolt tho so hopefully that come through. But if not looks like I am building the ten bolt.
__________________
"Buckle up I wanna try somethin!!" "of course it will hold!, I welded it!" 1977 c10 under knife for full rebuild, 5.3l 4l60e drive rain swap, replacement frame and green repaint |
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