Factory differential for 70 W-30
October 31st, 2022, 06:15 AM
#13
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,444
If your real question was what was the standard axle ratio, for a 1970 W30 MT car it was 3.42:1. Optional were RPO G88 3.91:1 and dealer-installed 4.33, 4.66, and 5.00.
October 31st, 2022, 06:16 PM
#14
Registered User
Join Date: Jan 2010
Location: central Indiana
Posts: 5,282
It is typically (and incorrectly) called a "12-bolt" because most people don't understand that GM made rear axles other than the Chevy axles. A lot of people have been rudely surprised when they paid Chevy axle money for one of these only to find out it isn't. As Kenneth correctly points out, it is more correct to call this a Type O axle and avoid the confusion.
If your real question was what was the standard axle ratio, for a 1970 W30 MT car it was 3.42:1. Optional were RPO G88 3.91:1 and dealer-installed 4.33, 4.66, and 5.00.
If your real question was what was the standard axle ratio, for a 1970 W30 MT car it was 3.42:1. Optional were RPO G88 3.91:1 and dealer-installed 4.33, 4.66, and 5.00.
defiantly some truth to this!!
when I bought my 69 back in 1987 I thought I really lucked out when I saw the 12 bolt diff cover. I don’t recall when or how I got the”wake up” about thr type o diff
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