http://www.monstertransmission.com/GM-Transmissions_c_4314.html
http://2004r.net/
http://web.archive.org/web/200701300142 ... rebld.html
http://web.archive.org/web/200701281733 ... 2004r.html
http://web.archive.org/web/200701251259 ... tches.html
http://web.archive.org/web/200704201144 ... enoid.html
200r4 trans codes
1984 - 4CQ
1985 - 5CQ
1986 - 6CZ
1987 - 7CZ
1988 - 8CZ
http://2004r.net/
http://web.archive.org/web/200701300142 ... rebld.html
http://web.archive.org/web/200701281733 ... 2004r.html
http://web.archive.org/web/200701251259 ... tches.html
http://web.archive.org/web/200704201144 ... enoid.html
200r4 trans codes
1984 - 4CQ
1985 - 5CQ
1986 - 6CZ
1987 - 7CZ
1988 - 8CZ
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