rear end questions... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

scuderia · 11-27-2015, 02:15 PM

Looking to swap out the gears on my truck.
Currently has the original 12 bolt non-posi rear end. (suspect it's 4.11's now but haven't pulled the cover to check.) Anyway, since I'm running a granny sm465 I'm figuring that I can go with some pretty tall gearing 3.07 or 3.08 (what's the story with those two? why are there both out there). I know I need a new series 3 carrier as well but what exactly 'am I looking for with regards to years, models etc.
Also, I'm running a 292 at the moment but will eventually be putting in a 327 anyone have thoughts on the gearing choice? I know that there are 3.42's but I'm doing more freeway than I thought and I'd really like to be able to cruise comfortably at 70 with either motor (28" tires on the truck).

Don

11-27-2015, 02:15 PM	#1
scuderia Registered User Join Date: May 2014 Location: SAN FRANCISCO Posts: 447	rear end questions... Looking to swap out the gears on my truck. Currently has the original 12 bolt non-posi rear end. (suspect it's 4.11's now but haven't pulled the cover to check.) Anyway, since I'm running a granny sm465 I'm figuring that I can go with some pretty tall gearing 3.07 or 3.08 (what's the story with those two? why are there both out there). I know I need a new series 3 carrier as well but what exactly 'am I looking for with regards to years, models etc. Also, I'm running a 292 at the moment but will eventually be putting in a 327 anyone have thoughts on the gearing choice? I know that there are 3.42's but I'm doing more freeway than I thought and I'd really like to be able to cruise comfortably at 70 with either motor (28" tires on the truck). Don __________________ '66 C10 SWB '64 C2 roadster '38 Indian Scout Flattracker '70 Triumph T120R '81 Laverda Jota



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