what should my tach be reading......

[Dave M]

With a 4L60E and assuming 3.23 rear, what should my tach indicate at, say, 80 mph? Can anyone do that math for me?
Thanks!

[KnightFire]

Here's a link for you to use:

http://www.f-body.org/gears/



KnightFire

[Craig 94 TA GT]

Just for an instant short answer, 80 mph in 4th is 2400 RPM. My tach shows about 2450 RPM. This is considering you have stock size wheels. Either way, go to the calculator Knightfire posted...it's great.

[fastTa]

Here are some other good calculators:

Maybe good enough for a sticky!

http://murray.faithweb.com/formulas.htm