12 BOLT OLDS REAREND WITH 12 BOLTS ON RING GEAR...HELP!!!!!!
#11
Senior Member
EXPERT BUILDER
Thread Starter
Join Date: May 2004
Posts: 284
where have you seen a olds 12 bolt ring gear rearend?this is not a chevy 12 bolt I have 2 chevy 12 bolts here,and it is nothing like it,my question is has anyone seen this or have any pics or know the application I bought it to put under my 72 chevelle but found out the chevy diff cover dont fit
#12
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Posts: 4,137
Originally Posted by gungho
where have you seen a olds 12 bolt ring gear rearend?this is not a chevy 12 bolt I have 2 chevy 12 bolts here,and it is nothing like it,my question is has anyone seen this or have any pics or know the application I bought it to put under my 72 chevelle but found out the chevy diff cover dont fit
#17
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Join Date: Sep 2003
Location: Richfield, Oh
Posts: 6
12 bolt olds rear
You have a full size 12 bolt olds rear diff. 1967-1970ish deltas 88 98 had a 12 bolt FULL size 'O' type 12 bolt rear. This rear came with 12 bolt symmetrical cover and 12 bolt ring gear .
The 12 bolt mid size or A-body GM 'O' 12 bolt with a symmetrical cover has 12 bolts on the cover and 10 bolts on the ring gear. These were in the olds cutlas, 442 AMERICAN made cars only 1967 -1970. Canadian car received the 12 bolt chevy rear and was open non posi diff.
then in 1971 1972 the rear was a 10 bolt 8.5 corperate just like the all the 70's and 80's cars and 1/2 ton trucks...ONLY they came wioth bolt in axles.
1973 was the switch to a new body style so that rear will not bolt into the 1972 and older body style.
So I am sure you have a FULL size 12 bolt 'O' type rear in your hands there. If I had pictures of the housing cover and or posi unit I could ID it for sure. Jim
The 12 bolt mid size or A-body GM 'O' 12 bolt with a symmetrical cover has 12 bolts on the cover and 10 bolts on the ring gear. These were in the olds cutlas, 442 AMERICAN made cars only 1967 -1970. Canadian car received the 12 bolt chevy rear and was open non posi diff.
then in 1971 1972 the rear was a 10 bolt 8.5 corperate just like the all the 70's and 80's cars and 1/2 ton trucks...ONLY they came wioth bolt in axles.
1973 was the switch to a new body style so that rear will not bolt into the 1972 and older body style.
So I am sure you have a FULL size 12 bolt 'O' type rear in your hands there. If I had pictures of the housing cover and or posi unit I could ID it for sure. Jim