there's fluid in certain areas they stay in place and hold valves in place but once you drain the pan then if the chance those vlaves move due to no fluid they might go the wrong way then keep fluid in incorrect areas of your trans which then cause's it to die fast and early, the rule is in 3,000 miles after the fluid change you will either still be running or pushing. don't you think if they wanted or thought the fluid needed changing they would have installed a drain plug? there's no drain plug in a trans on the GM stuff.
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1978 V20 Cuddy w/ 225 Johnson. And Several other boat's
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