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Old 09-01-2003, 02:11 PM   #1
68gmcjon
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Join Date: Mar 2002
Location: Winfield, Kansas
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12-bolt Posi

Just how tough is a 12-bolt posi rear-end? Compared to a dana 60, i know the dana will take just about all the thrashing i can give it, but how well will the 12-bolt hold up?
Thankx
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1968 GMC
Original A/C, bucket seats, PS,PB
396 bored to 402, Dynomax cerama-coat headers, Super 40 Flowmasters, 272/284 Crane cam, Crane gold roller rockers, holley 750 cfm double pumper, Edelbrock Performer RPM intake, HEI ignition, 9.5:compression
Alltogether 411HP and 446ft/lbs

Dana 60 w/ 3.54 gears
Turbo 400 tranny

Why would you have anything other than a big block? HAHA
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Old 09-01-2003, 10:08 PM   #2
Mike C
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Depends on what you do with it. Big tires and big power will break it . Average size tires (275 60 15 or about 28" high) won't. As long as you can avoid wheel hop. I have broken several, but wheel hop and 35" tires don't go well with 12 bolts.

Why?
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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
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Old 09-02-2003, 10:20 PM   #3
68gmcjon
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It will be for the engine in my sig. so it will have to deal with quite a little bit of power. As for wheels 275/60/15
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1968 GMC
Original A/C, bucket seats, PS,PB
396 bored to 402, Dynomax cerama-coat headers, Super 40 Flowmasters, 272/284 Crane cam, Crane gold roller rockers, holley 750 cfm double pumper, Edelbrock Performer RPM intake, HEI ignition, 9.5:compression
Alltogether 411HP and 446ft/lbs

Dana 60 w/ 3.54 gears
Turbo 400 tranny

Why would you have anything other than a big block? HAHA
68gmcjon is offline   Reply With Quote
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