mustangspotential

I have the 3.55's, and was thinking of a gear swap to 4.10's but I do 65/70% highway driving. It's not worth my occasional (talking once a year) trip to the track to make the swap. 3.55 to 3.73's also makes no sense financially.

My advice: spend money elsewhere if you have 3.55's and do a considerable amount of highway driving.

2006mustanggtowner

Yea I'm not gunna do 3.73 gunna do 3.90 or 4.10 3.55 are just to sluggy off the line yuck haha unless I was supercharged

flash_xx

I have 4.10's on my manual trans and I'm going to switch to 3.73. Although I love the 4.10's torque, they are just unbearable at highway speeds. If I had a 6 speed I'd definitely keep them.

2006mustanggtowner

So it looks like 3.90s might be the way to go might be the happy medium

2006mustanggtowner

Any opinions on 3.90 compared to the 4.10s I wanna get off the line and not be to high of rpm on the highway plus I don't want my gears to short.... Idk haha I've been thinking about gears for weeks lol

outceltj

Don't fear the gear. U will get all kinds of opinions here. I've heard that 3.90s which r motive gears whine so u may want 410s. Your over thinking this

wcgman

I've done 3 sets of FR 4.10's. One 06 NA, a 97 v6, and Roush M90 '10, all manual. I was happy with the 06 and the 10, but that little v6 would top out at maybe 80 or 90. But it felt like it could pull out a tree trunk!!

Im with outceltj, don't fear the gear. I vote the 4.10's. The RPMs on the v8's were slightly higher but I quickly became accustomed to it and the claims of "1st is unusable", well, I never had that problem. Sure, it knocks you back in the seat, but it wasn't unusable at all.

2006mustanggtowner

I'm either gunna do 3.73s or 3.90s idk yet dont wanna go to steep and not hook I know tracks different then street. Idk yet I'll make a desion haha maybe I'll make a pass with my 3.55s first and see what happens

adidasUNT8

I have 3.73's and I love them, but my car is pretty modded with sticky tires. I would look at your final goals. If you're looking for serious power with occasional track time, I'd do 3.73's

2006mustanggtowner

I'm not going crazy and what were your original gears and how does your car come off the line with 3.73