MACH5IVE

Wow! I hope you've perfected the driver mod!

wakin3722

that's some really good information. Thanks

Stone629

The state is building a new section to HWY 74 near here so I have had miles of pavement to play on for a year now. I had the chance to top out my Mach when I had 3.55 gears and after installation of the 4.10s currently in the car. Even got some Video of it.The only difference in top end is what gear I'm in at certain speeds. Before I could run 145mph in 4th, and now I am well into 5th. If you're worried about top speed, don't. That was one of my concerns too, but I can assure you that with 4.10s you will have zero problems pegging the speedo at 155mph. I don't think 4.30s would be much different. I stayedaway from 4.30s simply because Ispend alot of time onI-95 and didn't want those kinda traction problems when launching, but that being said, 4.30s are a great gear for the Mach and many people are satisfied with them. I did lose top end with my 2001 GT with 3.73s, but I think it was simply a lack of HP due to the 2v over 135mph. As far as gas mileage, go back to the Mach 1 page and scroll down to where I posted about MPGS on 4.10s. I got that reading last week and was shocked. 24.xx MPG. These guys info above is dead on, my RPM jumped exactly 300 RPM going from 3.55s to 4.10s at 70mph.

nikbait

I was really looking for this info too, thanks guys for posting. I was planning on modding my mach once I get it as well, and gears was the 1st thing I was thinking of. 4.10's it is

01snake

i know i will just have to hook now[:@]

xx9gt6xx

I'd worry about your rear end because if your hooking up w/ that much power and shock say bye bye to that differential. My buddy's dad said when he took apart my differential all of my bearings were shot and it was sooo close to locking up. If I woulda went any longer I woulda been screwed. And that's hooking up w/ stock gears and a few bolt ons. Just imagine w/ what you want to do w/ it...

Baron von Munchausen

I have been using 4.10's for the past four years in my '03 mach 1 and would not go any less....4.30's would be fine as well even for highway use. FYI in real-world driving my rpm are at 3000 at 90 mph in fifth.

xx9gt6xx

That's why I'm doing 4:10's...

Even though I hear these cars love the 4:30's, I still don't see myself going that steep. Maybe because I'm used to having a 2v where they don't like anything higher than a 3:73...

03_svt_cobra_22

how did you come up with this information?? just wondering

jchittick

I got this information off of another website. I thought that a gave credit in my original post, but I guess I didn't.