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Go Back   Fun In B.C. > All about your Ride > Chevy ramblings

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  #1  
Old 02-24-2010, 09:26 AM
godtool godtool is offline
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Posi??

After a wheel test andwith the diff cover off, what does a 14 bolt look like if its posi? Also a 12 bolt rear? The 14 bolt is hard to see into. Any factory id on tubes etc., if tags gone? A guy wants a posi rear 1/2 ton diff which I may have but don't want to sell him an open diff Can you post some pics?
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  #2  
Old 02-24-2010, 04:55 PM
85chevy 85chevy is offline
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You don't want a posi 1/2 ton diff will go boom 14 bolt isn't a 1/2 ton diff so

http://i64.photobucket.com/albums/h2...steam/POSI.jpg should look something like this

perhaps u post pics of the diffs in question?
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  #3  
Old 02-25-2010, 01:09 AM
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4skin 4skin is offline
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thats why they call them tick tock boom
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  #4  
Old 02-25-2010, 12:03 PM
godtool godtool is offline
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I took the cover off my 12 bolt 1/2 ton diff and its posi Looks just like this pic except my diff case is different It turns out it has 43 crown teeth and 13 pinion teeth, 3:08 gears. Is not the gear ratio for highway use??

http://old.astrosafari.com/images/re...Install017.jpg


My 14 bolt under my Jimmy looks like this pic but unfortunately my case is not shaved Even though I put a detroit locker in mine its hard to tell its in there. Unlike a 12 bolt posi how could you see if your 14 bolt was posi? I guess for a 14 bolt only way is to take it apart.

http://www.rrorc.com/gallery/data/62..._001_small.JPG
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  #5  
Old 02-25-2010, 12:31 PM
godtool godtool is offline
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I pulled the cover off 2 other 1/2 tons with 12 bolt diffs and both look open to me.

47 teeth on crown, 17 teeth on pinion, 2.7647 gear rato, this 81 4x4 pick-up has an sm465 and 235/75/R15 tires. Belongs to my freind Bill who complains about it being too slow so he is thinking of going bigger tires and try to find a 700R4.

40 teeth on crown, 13 on pinion, 3.0769 gear ratio. I guess that 3.08? This diff is under a 1980 pick-up 4x4.

And the Blazer with the rear posi, 43 teeth on crown, 14 on pinion, 3.0714 gear ratio (3.07??)
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Last edited by godtool : 02-25-2010 at 12:39 PM.
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  #6  
Old 02-25-2010, 06:30 PM
85chevy 85chevy is offline
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Damn I got 3.42s in my truck and I want to go higher I don't think i could handle 2.76s with 33s..... The neighbor had an old work truck with 2.76 was a 1/2 ton 81 4 speed 208 wouldn't even think about wheeling that way to low I think 3.42 is a decent choice for stock highway/offroad but I find with 33s my truck still has to much highway
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  #7  
Old 02-28-2010, 08:15 AM
godtool godtool is offline
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Heres a pic of the 3:42's, Theres a burr on the bottom of the grooves between the teeth. I wonder what that is??




How do you tell if there is a locker in there, unlike a 12 bolt diff where you can see in the carrier??




How do you tell if there is a locker in there, unlike a 12 bolt diff where you can see in the carrier??
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Old 02-28-2010, 08:46 AM
85chevy 85chevy is offline
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If the carrier has 4 holes looking in at the spider gears then its open if its only got three then its a gov lock according to one site which is y u need an open carrier to put a detriot in
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  #9  
Old 03-01-2010, 06:49 AM
godtool godtool is offline
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You cant put a detoit locker in a gov lock carier because you need 4 holes. I get it.
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