09-01-2025, 05:18 PM
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Ultimate Warrior
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Join Date: Nov 2002
Location: Moita, Portugal
Posts: 5,387
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Quote:
Originally Posted by scott70
Until the 454/455 came along wasn’t it recommended /required from Gm that it was 3.90 and up for the m21 trans?
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Most likely - my M21 equipped 442 had 3.90's...
Did not seem like an issue 40 years ago.
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