Are 410's too much for an auto?
08-04-2008, 12:00 PM
#2
4th Gear Member
Join Date: May 2007
Location: Utah
Posts: 1,249
RE: Are 410's too much for an auto?
There are some here who have done it. I'm getting my gears in 2 weeks and I'm
going with what(all who I consider very knowledable) suggests...3.73's. It should
be a more exciting seat-of-the-pants feelingthan the CAI/tune...if so, it's going to ROCK!
going with what(all who I consider very knowledable) suggests...3.73's. It should
be a more exciting seat-of-the-pants feelingthan the CAI/tune...if so, it's going to ROCK!
08-04-2008, 12:50 PM
#4
RE: Are 410's too much for an auto?
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.
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.
08-04-2008, 03:09 PM
#7
2nd Gear Member
Join Date: Apr 2007
Location: Woodstock, Georgia
Posts: 279
RE: Are 410's too much for an auto?
after reading this https://mustangforums.com/m_3879182/mpage_2/key_/tm.htm, am just a bit nervous about the 4.10s. Oh well, they are ordered and shipped now.
08-04-2008, 03:26 PM
#8
1st Gear Member
Join Date: Jul 2008
Location: MD
Posts: 90
RE: Are 410's too much for an auto?
No they arent too much to handle. I had 4.10's put in the second week of July.
Lets put it this way, I wouldnt buy another Mustang Auto (GT) without it.
Let the fun begin!
07
Auto
JLT/CAI
Steeda UDP's
FRPP 4.10's
270/277 RWHP
Lets put it this way, I wouldnt buy another Mustang Auto (GT) without it.
Let the fun begin!
07
Auto
JLT/CAI
Steeda UDP's
FRPP 4.10's
270/277 RWHP
08-04-2008, 08:51 PM
#10
3rd Gear Member
Join Date: Feb 2007
Location: Bay Area, CA
Posts: 847
RE: Are 410's 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 don't 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 aren't 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 don't 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 aren't terribly high this way.