Maine-iac

Got my 3.31's swapped out for FRPP 4.10's. DANG! This thing pulls like a jet fighter! Big bang for the buck on this one. Had my local Ford dealer do the install - they have a couple of mechanics that are pretty good at setting up 8.8 trac-loks. No problems at all - nice install. Thought I'd share this in case anyone is thinking about a gear swap - DO IT!

stealth_GT

Congrats on the gears

I wish I had the experiance of driving a manual with 4.10s...

I have 4.10s with an auto, but it's just not the same. Doh!

2005Redfire6

I'm sure that bad boy spins up real fast with 4.10s! Thats why I am going with them...



OP, I am sure coming from 331, 410s are night and day!

Maine-iac

Oh yeah! That's for sure. Still have a first gear too since I have the 5spd (not the new 6spd). Not bad on the highway either - turns ~2500rpm at 70mph. Today I will be doing a bunch more to the car - Steeda CAI, custom BAMA tune, Borla Stingers, and a new set of lightweight 20" wheels with some fat staggered rubber. Will post pics when done. Gotta go get to work on it.....

Nuke

Once you pass 1800 RPM, fuel mileage begins to drop-off drastically. I'm curious to see what you get on a cruise, pump-to-pump at a steady 70 MPH. I'm going to guess about 17-18 MPG (hand calculated) only because I've made a few long distance trips where I ran with rabbits at steady speeds for extended periods that had me in the 2500-2700 RPM range with my 3.55's.

roblee121

i ordered my 4.10's last week. how much did Ford Charge you to do the install?

Maine-iac

Gas mileage will suffer - no doubt about it. I put on about 5-7K miles per year, so my only concern is max performance. I did a similar swap on my last Mustang and went to 3.73's. Not nearly as much impact on the butt dyno, that's why I went with 4.10's. I don't do much highway driving either. Besides - if I was concerned about gas mileage I'd be driving a Prius

I'll let you know how I do for mileage.

Nuke

I was simply curious as I, too, don't really give a ratz azz about getting the best mileage that I can. I used to do 1 or 2, 400 mile one way trips per month for the 1st 2 years I owned my Stang so I logged a TON of fuel mileage data. The variances were... interesting.

Ford_Dude

well once I get around to getting my 4.10 I think I'll be able to log some MPG data fairly well (45mile trip to work everyday and then 45 mile back) though some days traffic can be annoying and kill speed

(it'll likely be early next year)

jwharton

I love my 4.10's...although since the Saleen, 1st is short, real short. you have to be ready or you get bit by the rev limiter and turns your face red if anyones looking I get decent mileage on the highway, especially if I keep it at 60 or below, which is easy here in KS as we have a lot of 55 mph roads still. At 65-75 mph with moderate hils and wind, AC on I can get 22-23 hand calculated. I take frequent 3 1/2 hour trips to Kansas City through the Flint Hills. This was all before the Saleen stage 3, but beleive it or not my mileage seems top have improved slightly with it...if I stay out of boost...which is hard to do Enjoy the gears!
Jim