4.10's vs 3.73's the saga continues

[sweet93hatch]

Howdy stang bangers. I have read all of the posts I could find on this board debating between the 3.73 and the 4.10. I have a chance to buy a 4.10 complete posi rearend that was completely gone through last year for $350.00. My only concern is that I drive my stang to work a lot in the summer which entails a half an hour drive at 65-70 mph. Gas milage/high r's. I still wanna hop on the expressway, but couldn't I just go like 55 or so (that would probably kill me, I've never gone that slow) Thanks boyz.

 

[85GTlover]

Just do it the RPM's will be no factor. Gas might be the only reason. Go for that deal. Run. You will like those much better.

 

[sweet93hatch]

4.10's, explorer upper, cobra lower, stock heads and cam, 65 mm tb, 2 chamber flowmasters, h pipe, msd ignition, nitto drag radials = low 13's??? Will it set me back in my seat? How will the grin factor be affected?

 

[Michael Yount]

Traction will be the key to good times. There'll be 10% difference in engine speed with the 4.10's vs. 3.73's. So if the 3.73's have you revving 2300 at 70, the 4.10's will have you at a bit over 2500rpm. Not that much difference. And yes, cruising along at 55-60 ought to net you pretty decent mileage.

 

[87'GTstang]

It will set you back in your seat and in your wallet.

Mileage is relative. Either you drive for 30 minutes at 70 mph or for 40 minutes at 55 mph - still think you don't burn as much gas even though it may take you as much as 10 more minutes driving time? You're still burning gas you know, only at a slower rate but for a longer period of time. Driving at 55 will save you a bit on mileage but nothing outstanding. If gas mileage is no big gripe factor, then it's a good deal.

 

[Michael Yount]

"You're still burning gas you know, only at a slower rate but for a longer period of time"

You may want to rethink your logic there. If you're getting 18 mpg at 70, and 21.6 mpg at 55, you're getting 20% better fuel mileage --- using 20% less fuel, no matter much how long it takes you to get there.

 

[drgn5.0]

what are the best gears for a supercharger?

 

[bgjohnson]

I think for a turbochargers it's a higher gear(lower number i.e 2.73) because it puts load on the turbocharger which creates more boost, but for superchargers umm I'm not quite sure. and if you do in town driving it will improve you MPG, I went from 15-16MPG with my 2.73's to 17-18 MPG with 3.73's. and is it a 5spd or AOD?

 

[drgn5.0]

5 speed with 3.27's

 

[blkstangman88]

if ur driving not far everyday get 4.10, but 3.73 are a good allround ratio.

 

[drgn5.0]

k cool, that is what i thought.

 

[blk92stangg]

I would try driving around in 4th gear for the whole trip to see if you can handle the droning. I find I love the sound of the exhaust and noise...until i have a passenger. Then you realize how damn load the thing is lol.

 

[speedytang]

With a Supercharger the 3.55 seems to be the best choice.

 

[88stangmangt]

With a Supercharger the 3.55 seems to be the best choice.

yup, going with those for my combo. I had 4.10's with my 87 lx they are wild gears i think you will enjoy them alot if i was staying N/A i would use them again.

 

[sweet93hatch]

Is there a noticeable difference on low end between the 3.73 and 4.10's? If its not huge, I would probably go with 3.73's.

 

[88stangmangt]

Is there a noticeable difference on low end between the 3.73 and 4.10's? If its not huge, I would probably go with 3.73's.

hahah Hell ya you can start off in second gear from a dead stop those are SOTP gears.If i wasnt going blown then i would use them.

 

[sweet93hatch]

Cool, then thats what I will do. I'll pay a little more at the pump to lay some smack down.

 

[Matts89LX5.0]

Cool, then thats what I will do. I'll pay a little more at the pump to lay some smack down.

Good way to look at it.

 

[MustangMulch]

How about 3.90s? That's a good compromise. I'm considering them myself.

 

[85GTlover]

Nah, Why compromise for 3.90's in that case, the gas issue is even less, but 4.10's are still better, so why
not be real good instead of just good.