I have a 2005 mustang v6 auto that is my project for now. I have a bbk cold air intake, a bama sct tuner and that's about it for right now. The next step would either be a new exhaust with headers to a true dual system, however I am thinking of either putting 3.73 gears or 4.10 gears with a tlok. What other performance options are available skipping FI. I know without FI we V6ers aren't gonna be very fast but anyways it's worth making faster.

 

Id say get an 8.8 with 3-73 or 4-10s that ll help at take off. Then an aluminum ds, then exhaust.. if you do long tube headers you get a better gain that shortys and duals are nice sounding but not a lot of gain.

 

You definitely have your head in the right place! The most beneficial mod for the butt dyno would be a set of gears. Since it's an automatic a set of 4.10s will be perfect!

After that a set of headers and true dual exhaust system will finish up your simple bolt ons! Then you can move to suspension components.

I hope this helps! Let me know if you have any questions or need some assistance.

-Dan

 

Great start regardless.

 

Aluminum DS will help you spin up a tad faster. Any weight that you can remove will help some, too. Research the elctric water pump for some more reduction in power losses.

 

Is the 8.8 differential required in order to install 3.73 or 4.10 gearz or can they be installed in the V6 stock differential?
From the research I have gathered, the 8.8 differential will allow both tires to spin, thus giving more power to the rear. With the stock V6 differential, only one wheel spins. Correct?

 

3.73 Gears for 7.5"

4.10 Gears for 7.5"

If you are going to buy gears for the 7.5" axle, you're going to have to buy those, and not the one's for the GT.

If you want both tires to spin, on your stock 7.5" differential, you can buy this Limited Slip Differential

Personally, I wouldn't spend the money on building up the 7.5. I remember reading about someone on here built up theirs and it blew with only a CAI/Tune and slicks. Save up and buy the 8.8", especially if you are going to be adding more power to the car later down the road.

 

That makes perfect sense. Thanks for the info!

 

Is getting the 8.8 really necessary? I don't really want to put 1400$ plus labor Just in gears. And with long tube headers to a true dual system I thought I wouldn't pass inspection? Maybe exhaust would be the next thing if the stock rear end can break with the tlok and gears...

 

Getting the 8.8 might not benefit you directly now, but down the road it will help, especially when you start adding some power. If youre going to do a job, do it right. With that being said, what kind of inspection do you have where you live? just visual, visual and emissions? or what?

4.10s will really wake an auto up by the way, add a tuner to get the shift points firmer and you'll be set.