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Mod | | | Forums66 Topics128,090 Posts1,056,376 Members48,442 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#52687 11/21/2005 6:53 PM | Joined: Oct 2002 Posts: 69 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2002 Posts: 69 | hey all i have a 3L80HD/THM475 from an 87 c-10 pickup i just had,
i plan on using it in another vehicle and its already removed and im in the process of cleaning it up and getitng it ready and all that
i found a few TSB's on this tranny:
903577A OCT 90 Direct Clutch Premature Wear With 3L80 and 3L80-HD
903567A OCT 90 Slip or No Drive With 3L80 and 3L80-HD A/T
904027A FEB 91 Service Replacement Transmission Assembly (Srta) 3L80/3L80-HD
93C07A MAR 93 Recall - Automatic Transmission Vent 4L60, 4L60E & 3L80
can anyone who knows about this particular tranny tell me about it and what to watch for on it or modify/replace in it so it will be alright?
and also what the TSB's above mean ? premature direct clutch wear ? slip or no drive problem ?
thanks for anything, any links, anything,
i have tag info from it if may help any ?
Randy the easter wabbit ! -here to help fellow enthusiasts as best as possible  parting some vehicles, 54 ford truck 57, chevy 210, 69 fairlane coupe HT and others, | | |
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