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06-11-2013, 10:52 PM
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#1 |
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Senior Member
 
Join Date: Jan 2012
Location: Phoenix, Arizona
Posts: 497
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Whats the differance
I have 2 trucks, one is a 1969 C-20 w/rear coil springs, the other is a 1970 or 71 C-20 w/rear leafs. I believe that the 69 has 4:11 posi. in it, but I have no clue what the other one could be. Any clues?
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06-12-2013, 12:26 AM
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#2 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,504
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Re: Whats the differance
The round cover is a Chevrolet 5200 (HO52). I stand corrected the other appears to be a later GM 14 bolt that was offered in couple of different versions.
If you have a SPID you can cross check that to the link in my signature for HO52 ratios and original axle installations. Plus an axle code stamped into the tube can tell you original ratio and if a posi of some sort. On the 14 bolt you are on your own. Sorry I don't have much later data.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban Last edited by SS Tim; 06-12-2013 at 01:11 AM. Reason: correction |
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06-12-2013, 12:37 AM
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#3 |
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Registered User
Join Date: Sep 2012
Location: Factory
Posts: 681
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Re: Whats the differance
Isn't the bottom photo a Corporate 14 bolt?
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06-12-2013, 09:51 AM
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#4 |
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Senior Member
Join Date: Apr 2011
Location: South NJ
Posts: 1,260
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Re: Whats the differance
Yes, that bottom one is a corporate 14.
To check the ratio (which I bet is 4.10) use this procedure: http://67-72chevytrucks.com/vboard/s...09&postcount=8 |
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