[DRockMoney]

I have 2006 v6 mustang with headers, cnl intake, flowmaster muffler, sct tune, and hurst short shifter and was wondering should I get 3.73 gears and posi...is it worth it...will I feel a major difference? As well is chirping your tires in second gear bad for your rear end of the car? And I have throttle body spacers and my car shop said don't put them on because they don't help the perfromance...is this true?

[EagleAutosports]

Hiya and welcome. Glad you joined us.
You'll definately feel a gear change. Well worth the money and if you're wanting a better posi unit, this would be the time to do it. Chirping the tires isn't that rough on the rear end as long as things are already in good shape.

[dab1990]

i was also wondering about the throttle body spacer. has anyone that put in 3.73 had a noticable mpg change/ high rpms on the highway? or is that mostly just with 4.10 gears

[SOHCman]

Originally Posted by DRockMoney

I have 2006 v6 mustang with headers, cnl intake, flowmaster muffler, sct tune, and hurst short shifter and was wondering should I get 3.73 gears and posi...is it worth it...will I feel a major difference?

Yes, I kept the stock gears because I do 90% highway driving and need to keep my MPG high.

You will love the T-LOK

Originally Posted by DRockMoney

As well is chirping your tires in second gear bad for your rear end of the car? And I have throttle body spacers and my car shop said don't put them on because they don't help the perfromance...is this true?

A little extra wear-and-tear... it's fun.
TB spacers I hear are useless, but they don't hurt performance either way.

SOHC