Rear End Ratio question

I just measured it for myself 30 minutes ago. It's not 3.73. It's closer to 3.54 than anything.

I am so used to driving cars with 6 speed automatics with overdrive that this just catch me by surprise.

Guess I'll have to get used to it or change the rear end gears to something like a 3.23 or taller.

...or get a Gear Vendors unit, or put in an automatic OD transmission...