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01-13-2015, 11:27 PM
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#1 |
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Registered User
Join Date: Jul 2008
Location: san jose ca
Posts: 467
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rear end markings
Can anyone tell me what this means. It is on the center section on the rear end. Truck is a 70 short step. Thanks
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01-14-2015, 08:18 AM
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#2 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,723
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Re: rear end markings
Just part of the casting info. Obviously General Motors and the 55 could be an alloy code or an internal date code or foundry code.
Doesn't mean anything. You can find stamped numbers on the passenger axle tube on the top side near the center section which do mean something, although many times what they book says doesn't jive with what you have IME. If you are trying to figure out gear ratio and if you have a limited slip, the truck probably needs a gear oil change so your best bet is pull the cover and kill two birds.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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01-14-2015, 12:17 PM
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#3 |
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Senior Member
 
Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,858
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Re: rear end markings
is that a crack in the housing?
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01-14-2015, 05:03 PM
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#4 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,723
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Re: rear end markings
Looks like the reinforcing rib and a shadow from the flash.
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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