62Imp Posted July 31, 2019 Share Posted July 31, 2019 i have a rear end out of a 1964 Riviera that has 3:07 gear and I want to change to a 3:90 or 4:10 gear. The problem is I don't know what the rear end is. The center section drops out, it has 30 spline axles, 28 spline pinion and 1 1/4 in pinion nut. there is a 70 stamped in the axle housing above the 3:07 gear stamp. any help will be greatly appreciated Link to comment Share on other sites More sharing options...
joe_padavano Posted July 31, 2019 Share Posted July 31, 2019 (edited) Sounds like a 9 3/8" Buick axle, which unfortunately is NOT the same as the Olds/Pontiac axle. Parts are difficult to find. Pictures would help with the ID. Does it look like this? If so, I'm pretty sure no one makes aftermarket gears for it. Edited July 31, 2019 by joe_padavano (see edit history) Link to comment Share on other sites More sharing options...
62Imp Posted August 1, 2019 Author Share Posted August 1, 2019 the brackets on top of the axle housing, I welded on to run 2 upper control arms Link to comment Share on other sites More sharing options...
joe_padavano Posted August 1, 2019 Share Posted August 1, 2019 Yeah, that's the Buick 9 3/8" axle. You won't find any aftermarket gears. Link to comment Share on other sites More sharing options...
62Imp Posted August 1, 2019 Author Share Posted August 1, 2019 Thanks Joe. I guess I'll be selling this rear end then Link to comment Share on other sites More sharing options...
lump Posted August 1, 2019 Share Posted August 1, 2019 Welcome, 62Imp. Lots of terrific knowledge is here to be found in the AACA Forums. Do you plan to install the Buick rear in the 62 Chevy shown at right in one of your photos? If so, may I ask, why did you choose that particular rear end? (Not criticizing the decision...just curious). Link to comment Share on other sites More sharing options...
62Imp Posted August 1, 2019 Author Share Posted August 1, 2019 I've had this car sense I was 18 and I'm 64 now, it's been parked for probably 30 years, its a body off restoration and an old friend of mine that builds custom cars is helping, he had this rear end and said back in the day guys put rear ends in cars out of Old's,Pontic and Buicks because they were stronger then stock Chevy rear end. I'm trying to build this car with a lot of what was done in the 60's 1 Link to comment Share on other sites More sharing options...
joe_padavano Posted August 1, 2019 Share Posted August 1, 2019 1 hour ago, 62Imp said: I've had this car sense I was 18 and I'm 64 now, it's been parked for probably 30 years, its a body off restoration and an old friend of mine that builds custom cars is helping, he had this rear end and said back in the day guys put rear ends in cars out of Old's,Pontic and Buicks because they were stronger then stock Chevy rear end. I'm trying to build this car with a lot of what was done in the 60's Those rear ends ARE stronger than the Chevy rear. The Olds/Pontiac axles were (and still are) very popular and thus there is a lot of aftermarket support. The Buick axle looks similar but shares nothing with the Olds/Pontiac unit. No demand for parts for it and unfortunately no aftermarket support as a result. 1 Link to comment Share on other sites More sharing options...
Rusty_OToole Posted August 1, 2019 Share Posted August 1, 2019 Somebody was on here looking for parts for one of those, he may be a customer if your unit has good parts in it. Link to comment Share on other sites More sharing options...
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