3.78 gears on V6

Dstang00 · 10-07-2005, 02:48 PM

On Mondy I have to get my rear end rebuilt. They are going to install 3.78 gears. I know there's someone whio has had this done. How big of a difference is there in power? And is that a good ratio for everyday driving?

**bighoss88lx** · 10-07-2005, 03:06 PM

Gears dont add power, there just a torque multiplier. You will notice a significant difference over the stock 3.27's. You may be happier with 4.10's since you have a V6.

Dstang00 · 10-07-2005, 04:20 PM

Quote:

Originally Posted by bighoss88lx

Gears dont add power, there just a torque multiplier. You will notice a significant difference over the stock 3.27's. You may be happier with 4.10's since you have a V6.

Sorry, my bad about the power, I knew that. What would be the difference be between the two? 3.78 & 4.10

How would the 4.10 effect gas mileage? I drive a lot for my job so I don't want to decrease it too much.

drawlin · 10-08-2005, 12:27 PM

if its a daily driver, 3.73's are perfect. 4.10's are gona jump ur rpm's at 60 to about 4k.

SAvoltage · 10-08-2005, 01:25 PM

i loved my 4.10's but i needed a tune real bad afterwards, to take off my top speed limiter. i was hitting my top speed in the QM. :larry03gt but i loved um for the "street"

edit* one mistake i made was not to put a tlok in there while i was changing gears, i would also do that.

Dstang00 · 10-09-2005, 02:37 PM

Thanks for the info guys,

I think I'm going to stick with the 3.78s just because I do so much driving.

intermision · 10-09-2005, 02:48 PM

Quote:

Originally Posted by Dstang00

Thanks for the info guys,

I think I'm going to stick with the 3.78s just because I do so much driving.

Do you mean 3.73 ?

Dstang00 · 10-09-2005, 03:23 PM

Quote:

Originally Posted by intermision

Do you mean 3.73 ?

Sorry, my bad. yes I did. :jmg680:

04gtstang · 10-09-2005, 07:23 PM

We put 3.73s in my dads 00 V6 5spd and WOW what a difference. I loved it. It didnt make quite as much difference in my GT, but probably because it already had plenty of torque....still the perfect gear for both cars IMO. Not too low for highway and not too high for performance. Perfect all around gear...you will be VERY happy with them.

Dstang00 · 10-10-2005, 09:13 AM

Great!!!

I can't wait.. I'll have it done this afternoon..

Dstang00 · 10-10-2005, 11:48 PM

I finally got the new gears. I love them. :redrum: It's almost like a new car!

drawlin · 10-11-2005, 12:15 AM

whats your rpm at 60mph?

Dstang00 · 10-11-2005, 06:11 PM

Quote:

Originally Posted by drawlin

whats your rpm at 60mph?

I just drove it to Dallas. RPM @ 60 was 1800
@ 80 it was 2400 :jeff:

I Am Cornholio · 01-10-2006, 09:46 AM

Quote:

Originally Posted by drawlin

if its a daily driver, 3.73's are perfect. 4.10's are gona jump ur rpm's at 60 to about 4k.

Know this thread is old, but 4K rpm at 60 is plain BS. The '04 V6 auto in my driveway with 4.10s doesn't hit 3000 rpm until just below 80 mph.

All the stories commonly heard about 4.10s killing highway mileage is also BS.

intermision · 01-10-2006, 10:11 AM

Quote:

Originally Posted by I Am Cornholio

Know this thread is old, but 4K rpm at 60 is plain BS. The '04 V6 auto in my driveway with 4.10s doesn't hit 3000 rpm until just below 80 mph.

All the stories commonly heard about 4.10s killing highway mileage is also BS.

I get almost the exact same mialage with 4.10s as I did with my stock gears.

drawlin · 01-15-2006, 10:54 AM

now try it with over drive off. in heavy rain/slick roads, i drive with OD off. your rpms will be around 4k at 60 with od off, or at least that what i calcualted by useing the gearing numbers.

with od on, yeah, 4.10's wont be so bad, if you dont mind the engine hum.

I Am Cornholio · 01-15-2006, 04:12 PM

Quote:

Originally Posted by drawlin

now try it with over drive off. in heavy rain/slick roads, i drive with OD off. your rpms will be around 4k at 60 with od off, or at least that what i calcualted by useing the gearing numbers.

with od on, yeah, 4.10's wont be so bad, if you dont mind the engine hum.

What engine hum? And, what does OD off have to do with heavy rain/slick roads? If it's a safety issue, 60 might be too fast anyway regardless of whether OD is on or off, if the rain is that heavy or the roads are that slick.

drawlin · 01-16-2006, 09:00 PM

meh, OD off give a bit more throtle responce. you dont have to push teh pedal quite as far to get going, so you can feather it easier. as for the hum, i always had a hum, even befor i did my exhaust.

I Am Cornholio · 01-17-2006, 09:54 AM

Oh yeah, OD off does make a noticeable difference in throttle response, and it's too bad Ford set the default setting to "On". I was referring to the point that is often brought up that "4.10s will kill your gas mileage on the highway". Not true, because cruising at highway speeds, I would likely have OD engaged, and my experience with 4.10s has demonstrated that mileage drops little if at all from running with stock rear gears. Performance sure takes a turn for the better though, when you want it to. We've taken my wife's daily driver '04 V6 automatic on several 2,000+ mile road trips after switching to 4.10s and a T-Lok and the gas mileage was not killed at all. With OD engaged, it doesn't reach 3,000 rpm until just below 80 mph, and maybe I haven't ever noticed a hum because it's so much quieter than my own car with the LoudMouths.

drawlin · 01-17-2006, 03:43 PM

lol, yeah, once you're used to loud exhaust, engine hum may not be audible.

10-07-2005, 02:48 PM	#1
Dstang00 Registered User Join Date: Nov 2003 Location: Canyon Lake, Texas Posts: 87 Trader Rating: (0)	3.78 gears on V6 On Mondy I have to get my rear end rebuilt. They are going to install 3.78 gears. I know there's someone whio has had this done. How big of a difference is there in power? And is that a good ratio for everyday driving?

10-07-2005, 03:06 PM	#2
bighoss88lx Killing is my Business...And Business is Good! Join Date: Aug 2003 Location: Elmendorf, Tejas Posts: 5,953 Trader Rating: (1)	Gears dont add power, there just a torque multiplier. You will notice a significant difference over the stock 3.27's. You may be happier with 4.10's since you have a V6. __________________ 1988 Mustang LX

10-09-2005, 07:23 PM	#9
04gtstang Registered User Join Date: May 2005 Location: Bastrop TX Posts: 112 Trader Rating: (0)	We put 3.73s in my dads 00 V6 5spd and WOW what a difference. I loved it. It didnt make quite as much difference in my GT, but probably because it already had plenty of torque....still the perfect gear for both cars IMO. Not too low for highway and not too high for performance. Perfect all around gear...you will be VERY happy with them. __________________ Heavily modded 1966 stang W/ 331 stroker, 8.5-1, all 4340 Forged, aluminum heads, custom blower cam, awaiting a supercharger. 2006 blue/grey Suzuki GSX1300R Hayabusa (almost stock)

01-17-2006, 09:54 AM	#19
I Am Cornholio SURRENDER YOUR TP!!! Join Date: Jul 2004 Location: Republic of Texas Posts: 78 Trader Rating: (0)	Oh yeah, OD off does make a noticeable difference in throttle response, and it's too bad Ford set the default setting to "On". I was referring to the point that is often brought up that "4.10s will kill your gas mileage on the highway". Not true, because cruising at highway speeds, I would likely have OD engaged, and my experience with 4.10s has demonstrated that mileage drops little if at all from running with stock rear gears. Performance sure takes a turn for the better though, when you want it to. We've taken my wife's daily driver '04 V6 automatic on several 2,000+ mile road trips after switching to 4.10s and a T-Lok and the gas mileage was not killed at all. With OD engaged, it doesn't reach 3,000 rpm until just below 80 mph, and maybe I haven't ever noticed a hum because it's so much quieter than my own car with the LoudMouths. __________________ 2003 Mach 1 Black 5 spd w/IUP Lot of Mods

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10-08-2005, 12:27 PM	#4
drawlin unknown , even to me........ Join Date: May 2005 Location: Houston, Tx Posts: 757 Trader Rating: (0)	if its a daily driver, 3.73's are perfect. 4.10's are gona jump ur rpm's at 60 to about 4k.

10-08-2005, 01:25 PM	#5
SAvoltage Registered User Join Date: May 2005 Location: San Antonio Posts: 1,568 Trader Rating: (0)	i loved my 4.10's but i needed a tune real bad afterwards, to take off my top speed limiter. i was hitting my top speed in the QM. :larry03gt but i loved um for the "street" edit* one mistake i made was not to put a tlok in there while i was changing gears, i would also do that.

10-09-2005, 02:37 PM	#6
Dstang00 Registered User Join Date: Nov 2003 Location: Canyon Lake, Texas Posts: 87 Trader Rating: (0)	Thanks for the info guys, I think I'm going to stick with the 3.78s just because I do so much driving.

10-10-2005, 09:13 AM	#10
Dstang00 Registered User Join Date: Nov 2003 Location: Canyon Lake, Texas Posts: 87 Trader Rating: (0)	Great!!! I can't wait.. I'll have it done this afternoon..

10-10-2005, 11:48 PM	#11
Dstang00 Registered User Join Date: Nov 2003 Location: Canyon Lake, Texas Posts: 87 Trader Rating: (0)	I finally got the new gears. I love them. :redrum: It's almost like a new car!

10-11-2005, 12:15 AM	#12
drawlin unknown , even to me........ Join Date: May 2005 Location: Houston, Tx Posts: 757 Trader Rating: (0)	whats your rpm at 60mph?

01-15-2006, 10:54 AM	#16
drawlin unknown , even to me........ Join Date: May 2005 Location: Houston, Tx Posts: 757 Trader Rating: (0)	now try it with over drive off. in heavy rain/slick roads, i drive with OD off. your rpms will be around 4k at 60 with od off, or at least that what i calcualted by useing the gearing numbers. with od on, yeah, 4.10's wont be so bad, if you dont mind the engine hum.

01-16-2006, 09:00 PM	#18
drawlin unknown , even to me........ Join Date: May 2005 Location: Houston, Tx Posts: 757 Trader Rating: (0)	meh, OD off give a bit more throtle responce. you dont have to push teh pedal quite as far to get going, so you can feather it easier. as for the hum, i always had a hum, even befor i did my exhaust.

01-17-2006, 03:43 PM	#20
drawlin unknown , even to me........ Join Date: May 2005 Location: Houston, Tx Posts: 757 Trader Rating: (0)	lol, yeah, once you're used to loud exhaust, engine hum may not be audible.