I was using a gear calculator and with 4.10 gears, and the 1.00 3rd gear ratio of the trans, and at 6000rpm shift point I would be doing around 110mph. That aint going to happen on the street with me driving.
But on those long stretches of highway.....late and night, when nobodies around?

If you're run a top end blast, just make sure you either turn the OD off, or let off on the gas a little until it's shifted into O/D....just so it doesn't "bang" into place.

