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4.10 guys let me know.

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4.10 guys let me know.

Old 08-04-2008, 04:32 PM
1st Gear Member
Join Date: Jun 2006
Posts: 77
Default RE: 4.10 guys let me know.

Why don't more people go with 4.30s or higher if we're limited to 147MPH? Might as well get bigger gears, limiting us to a max MPH of 155 or so, but getting awesome acceleration.
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Old 08-04-2008, 05:10 PM
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Join Date: Oct 2007
Location: Harrisburg PA
Posts: 1,778
Default RE: 4.10 guys let me know.

ORIGINAL: thewarmachine

I've heard three different numbers for 5th gear.....67, .675, and now .62

Anyone know the real numbers for our gears?
Good question - I got the number .62 from Wikipedia...but you never know if this stuff is correct or not: http://en.wikipedia.org/wiki/Tremec_...0_transmission
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Old 08-04-2008, 09:05 PM
Join Date: Jun 2008
Posts: 30
Default RE: 4.10 guys let me know.

had my 4.10's installed last week and could not and would not ever regret it. i would recommend the ford racing. i hear a lot of complaints about how loud other brands are. for about $500 installed there is no other upgrade that would make the same difference. with out question.... gears all the way
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Old 08-04-2008, 09:24 PM
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Join Date: Nov 2006
Location: Alabama
Posts: 2,935
Default RE: 4.10 guys let me know.

Hate to hijack the thread, but since we're on this topic...
For you automatic guys:
I was going to get them, but a few months ago I saw this video on youtube of a guy1/2 throttle accelerating from light, and it seemed that the shifts were so close from 1st to 2nd that it would be annoying for a daily driver. Does this bother you guys or is it not so bad in person? Maybe it's just because he didn't smoothly push the pedal down??? idk.

I have also seen videos of autos going WOT and getting to 60 in 4.8 seconds, which I like ALOT. I just don't want them to be annoying for a daily driver. Thanks.
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Old 08-04-2008, 10:23 PM
1st Gear Member
Join Date: Jun 2006
Posts: 77
Default RE: 4.10 guys let me know.

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.
from https://mustangforums.com/m_5350640/tm.htm
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