Search found 3 matches

by 73 Survivor
Tue Jul 04, 2017 10:18 pm
Forum: 10 Bolt Differential Questions
Topic: 8.5 switch from 2:73 to 3:42 gears
Replies: 4
Views: 1182

Re: 8.5 switch from 2:73 to 3:42 gears

Having more closely examined the photos, realize that what I thought was gasket is actually part of the housing itself below the cover. :roll:
by 73 Survivor
Tue Jul 04, 2017 9:05 pm
Forum: 10 Bolt Differential Questions
Topic: 8.5 switch from 2:73 to 3:42 gears
Replies: 4
Views: 1182

Re: 8.5 switch from 2:73 to 3:42 gears

I figured it was an 8.5 according to your diff ID photos, and the fact ID indicates Regal (same as Century), Cutlass, Grand Prix, Malibu, 73-77 use this rear end. Took photos with car jacked up, no hoist here. However, it matches exactly the photo of the tired looking open differential marked 10 bol...
by 73 Survivor
Tue Jul 04, 2017 11:57 am
Forum: 10 Bolt Differential Questions
Topic: 8.5 switch from 2:73 to 3:42 gears
Replies: 4
Views: 1182

8.5 switch from 2:73 to 3:42 gears

I own a 1973 Buick Century with the original factory open differential, with 2:73 gears. Car only has 26K original miles. Original turbo 350 hooked to a J code 4bbl. 350 Buick motor. I want more punch off the line, so looking at lower gearing, but not too short for hwy cruising, and considering some...

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