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Old 11-11-2011, 06:29 AM
firebird1969 firebird1969 is offline
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T-400 trans question

I have a th400 in a 1969 firebird, 3.55 rear, 25" tire. tach shows 3500rpm at 55mph. calculator says I should be at 2700rpm. trans and TQ conv are new 10/2010. 1800 stall. Any idea what might be wrong? tach and speedo are correct. thanks. also anyone do a 200r4 swap for a 69 firebird?
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