What makes a 12 bolt a 12 bolt??? what bolts count

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monzaz
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What makes a 12 bolt a 12 bolt??? what bolts count

Postby monzaz » Mon Mar 21, 2011 1:41 pm

What bolts are we talking about when we say 12 bolt rear?
J D Race

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monzaz
Average Poster
Posts: 843
Joined: Tue Nov 13, 2007 7:56 pm
Location: RICHFIELD, OH

Re: What makes a 12 bolt a 12 bolt??? what bolts count

Postby monzaz » Mon Mar 21, 2011 1:54 pm

Answer-

the RING GEAR BOLTS are the bolts we refer to when asking whether you have a 10 or 12 bolt rear end

SOMETIMES the covers match with the ring gear bolts and makes it easy to reference from the out side.

The extra stability of the 12 ring gear bolts adds strength to your differential along with MANY other parts.

List of TRUE 12 BOLT REARS
-CHEVY 12 BOLT 1965-1972 GM (12 COVER BOLTS)
-CHRYSLER 8 3/4 741 742 489 CASES (10 THIRD MEMBER BOLTS)
-DANA 60 TRUCK AND HEMI CAR REAR (10 COVER BOLTS)
-GM 9.5 SEMI FLOATER (14 COVER BOLTS)
-GM 10.5 FULL FLOATER (14 COVER BOLTS)
-CHEVY TRUCK 12 BOLT (12 COVER BOLTS)
-BUICK 9.3 66-70 (10 BOLT COVER)
-PONTIAC 8.875 65-77 (10 BOLT COVER)
-OLDS/PONTIAC 57-64 (10 BOLT THIRD MEMBER BOLTS) OLD GASSER REAR
- FORD 10.5 TRUCK (12 BOLT COVER)
-CHRYSLER 9.25 (12 BOLT COVER)
-12 BOLT OLDS FULL SIZE CAR (12 BOLT COVER)

LIST OF 10 BOLT REARS
-FORD 9"
-FORD 8"
-GM 8.5
-GM 8.2
-GM 7.5
-GM 12 BOLT 'O' (12 BOLT COVER) A-BODY 67-70
-FORD 7.5
-FORD 8.8
-CHEVY 8.2 DROP OUT THIRD MEMBER (10 BOLT THIRD MEMBER BOLTS/ NUTS)
-CHRYSLER 8.25
-DANA 44
-DANA 30
-DANA 35

GOOD LUCK WITH THE INFO- JIM
-
J D Race


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