I wouldn't recommend using that 1, 2, 3, shift for long, it will blow your tranny up. I recommend getting a recalibrated valve body from Lentech or P.A. That way you won't trash your tranny. Then I would get a looser converter and some gears,(with an a.o.d. I would go with 4.10) other than that you may just need to see what r.pm your crossing the line at, that m.p.h. is way too low.
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