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02-05-2008 01:20 PM #1
need info on the rearend in my truck
hi, i have 1981 chevy scotsdale. I wondering what size ring gear is in my rear end. Its a ten bolt and the gear ratio is 250 (i think, i took the cover off mounths ago and i didn't rite it down). I want to change the gear ratio and i would also like to convert it to a limmited slip posi. So the question is what size is the ring gear and can i make it into a posi and how much would this cost.
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02-05-2008 01:57 PM #2
Unless its been changed ,the book lists 8.5 ring gear in a 10 bolt from starting in 80 .....here is a link ......
Automotive Parts Guide for GM 8.5 inch Differentials, Ring & Pinions - Save MoneyIts gunna take longer than u thought and its gunna cost more too(plan ahead!)
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02-05-2008 02:09 PM #3
is there a cheaper option to improving my rearend????
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02-05-2008 04:33 PM #4
a 2:50 ratio?? usually 6 poppers had steeper gears then that.
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Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance