[PWallace2021]

I've been wanting to get a 3.73 gear for a while but am just now getting around to it. Will it offset my tachometer or speedometer? Also, for anyone thats already installed one, did you notice a big improvement?

[stlwagon]

You'll need to have your tune adjusted for the new gears. If you don't have a handheld tuner, your Ford dealer can make the adjustment.

[xXxGTxXx]

yea..you can def tell a difference

[04KenneBellGT]

Yeah just adjust it with a tuner for the 373's. And yes you will notice a huge difference and im sure ya will love them.

[fobra559]

You'll want to take off hard on every stoplight when you first get them

[4.6Power]

Youll also have a little more trouble hookin them from a dig.

[fobra559]

^Very true

[hpjunkie03GT]

I love mine! They knocked 3 tenths off my 1/8 mi. times

[jblasi05]

You can also get a speedometer recalabrator from ford racing. its a much cheaper route if you dont want to spend the money for a tuner right now.
3.73 is the way to go. I used to have 4.10's, but i switched cause ide have to shift into 5th gear at 100 mph. at least with 3.73's you can shift at 110 mph. That is better for the quarter mile too.
I noticed a huge throw back in the seat difference with 4.10's, but i did notice a little less with the 3.73's. Still better than those 3.27's

[mell0]

Originally Posted by jblasi05

at least with 3.73's you can shift at 110 mph.

you have to shift into fifth at 110 with 3:73's?

[jblasi05]

yeah, if you have a tremic 3650, you maybe able to geta little more (115 or so)... but thats me shifting at 5800 ish rpm. i dont take it too high beacause the stock valvetrain starts loosing power at like 6000 or so.