Are 410's too much for an auto?
08-04-2008, 11:13 PM
#11
1st Gear Member
Join Date: Dec 2007
Location: NC
Posts: 74
RE: Are 410s too much for an auto?
ORIGINAL: howarmat
These are the internal gearing numbers for the trannys. Since the auto and manual transmission have different internal gearing, the rpms and such are different in different gears.
Automatic transmission gearing
1st: 3.22 .1
2nd: 2.29 .1
3rd: 1.55 .1
4th: 1.00 .1
5th: 0.71 .1
Rev: 3.07 .1
Manual Transmission gearing
1st: 3.38 :1
2nd: 2.00 :1
3rd: 1.32 :1
4th: 1.00 :1
5th: 0.675 :1
Rev: 3.38 :1
The final drive gear is calculated by using the tranny ratio times the rear end ratio
So in 5th gear you would have
M: 4.10*.675= 2.76
A: 4.10*.71=2.91
A: 3.73*.71=2.64
Ideally a 3.90 gear set in the auto would equal the 4.10s in a manual but they are NOT a FRPP gear so that is one reason most people do not use them.
Notice other gears besides the final gear too......some of those numbers are much different in the auto than the manual. Its really personal preference but usually you are stepping up from 3.31s in the auto and going up to the 3.73s will give you a nice kick in the pants and the RPMs on the highway are not terribly high this way.
These are the internal gearing numbers for the trannys. Since the auto and manual transmission have different internal gearing, the rpms and such are different in different gears.
Automatic transmission gearing
1st: 3.22 .1
2nd: 2.29 .1
3rd: 1.55 .1
4th: 1.00 .1
5th: 0.71 .1
Rev: 3.07 .1
Manual Transmission gearing
1st: 3.38 :1
2nd: 2.00 :1
3rd: 1.32 :1
4th: 1.00 :1
5th: 0.675 :1
Rev: 3.38 :1
The final drive gear is calculated by using the tranny ratio times the rear end ratio
So in 5th gear you would have
M: 4.10*.675= 2.76
A: 4.10*.71=2.91
A: 3.73*.71=2.64
Ideally a 3.90 gear set in the auto would equal the 4.10s in a manual but they are NOT a FRPP gear so that is one reason most people do not use them.
Notice other gears besides the final gear too......some of those numbers are much different in the auto than the manual. Its really personal preference but usually you are stepping up from 3.31s in the auto and going up to the 3.73s will give you a nice kick in the pants and the RPMs on the highway are not terribly high this way.
08-07-2008, 08:42 PM
#13
2nd Gear Member
Join Date: Apr 2007
Location: Woodstock, Georgia
Posts: 279
RE: Are 410s too much for an auto?
4.10s installed today and I gotta say, NOT what I expected. Its definitely quicker, but not the difference I expected.. 
I guess the difference is more noticable with a manual trans.
It does chirp 1st, 2nd, and 3rd but I thought it would just burn off the rubber. I guess chirping 20s in 3rd is pretty good.
Sidenote, does anyone know how to adust the SCT XCAL 2 for gears? My odometer is turning quickly. False miles.
I guess the difference is more noticable with a manual trans. It does chirp 1st, 2nd, and 3rd but I thought it would just burn off the rubber. I guess chirping 20s in 3rd is pretty good.
Sidenote, does anyone know how to adust the SCT XCAL 2 for gears? My odometer is turning quickly. False miles.
08-07-2008, 09:18 PM
#15
Multi-Tasking Moderator!
Join Date: Nov 2006
Location: Detroit Rock City!
Posts: 15,618
RE: Are 410s too much for an auto?
remember that 20's hinder performance so yes chirping in third is pretty good!
ORIGINAL: joemagna
4.10s installed today and I gotta say, NOT what I expected. Its definitely quicker, but not the difference I expected.. I guess the difference is more noticable with a manual trans.
It does chirp 1st, 2nd, and 3rd but I thought it would just burn off the rubber. I guess chirping 20s in 3rd is pretty good.
Sidenote, does anyone know how to adust the SCT XCAL 2 for gears? My odometer is turning quickly. False miles.
4.10s installed today and I gotta say, NOT what I expected. Its definitely quicker, but not the difference I expected..
I guess the difference is more noticable with a manual trans. It does chirp 1st, 2nd, and 3rd but I thought it would just burn off the rubber. I guess chirping 20s in 3rd is pretty good.
Sidenote, does anyone know how to adust the SCT XCAL 2 for gears? My odometer is turning quickly. False miles.
08-07-2008, 10:54 PM
#17
2nd Gear Member
Join Date: Jan 2008
Location:
Posts: 216
RE: Are 410s too much for an auto?
i dunno y anyone would put 20's on a stang? its so ghetto 20's r for suvs maybe if u went to 18s ud see a big difference. instead of looking for a big difference trying to move a big heavy wheel owell not my cup of tea but i guess diff strokes for diff folks.
08-08-2008, 06:13 AM
#18
2nd Gear Member
Join Date: Apr 2007
Location: Woodstock, Georgia
Posts: 279
RE: Are 410s too much for an auto?
and i dunno y anyone would buy a V6 mustang, but as you said diff strokes.....
anyway, not going to get into that battle. But after driving to work this morning, yeah, it pulls like a beast now. I guess I was just going easy on it last night since new install. I drove the hell out of it this morn and I LOVE IT!!!!
anyway, not going to get into that battle. But after driving to work this morning, yeah, it pulls like a beast now. I guess I was just going easy on it last night since new install. I drove the hell out of it this morn and I LOVE IT!!!!
08-08-2008, 07:06 AM
#19
4th Gear Member
Join Date: May 2007
Location: Utah
Posts: 1,249
RE: Are 410s too much for an auto?
ORIGINAL: joemagna
and i dunno y anyone would buy a V6 mustang, but as you said diff strokes.....
anyway, not going to get into that battle. But after driving to work this morning, yeah, it pulls like a beast now. I guess I was just going easy on it last night since new install. I drove the hell out of it this morn and I LOVE IT!!!!
and i dunno y anyone would buy a V6 mustang, but as you said diff strokes.....
anyway, not going to get into that battle. But after driving to work this morning, yeah, it pulls like a beast now. I guess I was just going easy on it last night since new install. I drove the hell out of it this morn and I LOVE IT!!!!
just help you get to the sweet spot quicker.I'm getting mine (3.73's) in 2 weeks.
