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Re: Changing auto transmission oil on 72?
This forum is great. Thanks Cline. Great info. My instincts were right not to trust what I read but rather trust other people's experience. I'll just leave the Dexron III in there and change it every 30K miles or 5 years then. Forget the expensive VI on my older stuff. I'll just put the VI in my Caprice PPV (6L80E) when that service interval comes due.
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Tom 
Chevy by day...
1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E
2011 Chevy Caprice PPV 9C3 6.0L
1995 Chevy Caprice 9C1
1994 Chevy Caprice 9C1 #3
1995 Chevy Caprice Wagon #2
1995 Chevy Impala SS
Mopar by night...
1969 Dodge Charger
1972 Chrysler Newport 2dr Hardtop (27K miles)
Plus others...
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