[innrkid]

Hey...does anybody know the individual ratios of the 5 gears in a 5 speed manual tranny. I downloaded a calculator that allows you to look at top speed and rpms per gear based on whatever rear end gears you plug into the calculator. But I can't find the gear by gear ratios. Thanks

[99mustang232]

your mustang came with the TR3650 manual transmission with a new 5th gear ratio for improved fuel economy which adds an extra 2mpg on the highways, but equally important in picking the appropriate rear gear ratio.

2005+ Mustang (Tremec 3650)
1- 3.34:1
2- 2.00:1
3- 1.32:1
4- 1.00:1
5- 0.68:1
reverse- 3.38:1

2005+ Mustang (5R55S) auto
1- 3.25:1
2- 2.44:1
3- 1.55:1
4- 1.00:1
5- 0.75:1
reverse- 3.07:1

if i'm not mistaken the 5th gear was .62 for the tr3650 in previous mustangs?

[innrkid]

99 stang,

Thanks. That is exactly what I needed. I plugged them into the calculator and Bingo!...all the info I needed.
I was surprised that the rpm's at 60 won't change that much with 4.10's. I am using 3.55's as the stock gears...that is correct, right?

[ChrisJ]

300 rpm's is about the only diff...

[2k05gt]

--------------------------------------------------------------------------------

Mustang Calculators: (Gears are for S197 stangs, adding other years soon)

ever wonder what size tire would fit on a 18x9 rim or what a set of 4.10 gears would do to your top speed? well, I did, so I created a spreadsheet that calculates these for you. Give it a try.....

http://home.comcast.net/~swieduwilt0...lculations.xls

I would like to hear your comments..

you can get an excel viewer that plugs into your browser here:
http://www.microsoft.com/downloads/d...displaylang=EN

[innrkid]

Great spreadsheet tool for ding the calculations. Well done!!!

[Sh0gun!]

when you change the gear ratio they all shouldnt be the same right? I was reading somewhere on here that the gear ratio should be 3.73. Sorry if i sound stupid im just trying to understand all this.

[innrkid]

Originally Posted by Sh0gun! when you change the gear ratio they all shouldnt be the same right? I was reading somewhere on here that the gear ratio should be 3.73. Sorry if i sound stupid im just trying to understand all this.

3.34
2.00
1.32
1.00
0.68


1st thru 5th ratios.

[Sh0gun!]

can u change them and if so how would you?

[innrkid]

Originally Posted by Sh0gun! can u change them and if so how would you?

Why?

Change one gear...your rear end.

[Sh0gun!]

Originally Posted by innrkid Why? Change one gear...your rear end.

Uh because I want to Upgrade my tire size and what you said made no sense at all. Sorry I'm new to this, but at least I know I'm the intelligent one in this conversation.

[5literJeff]

Originally Posted by Sh0gun! when you change the gear ratio they all shouldnt be the same right? I was reading somewhere on here that the gear ratio should be 3.73. Sorry if i sound stupid im just trying to understand all this.

When people refer to '3.73' usually they are reffering to the rear end gear ratio located in the rear axle in the differential. Not a transmission ratio. No transmission I know has a 3.73 first gear, not that im some kind of transmisson guy anyway.

Stock rear gear was 2.73, 3.08, 3.27, for fox body stangs, I dont know if ford changed those ratios for the mod motors.

Alot of people say put a 3.73 gear in a stick and 4.10 for auto but its all up to you. I had an LTD with a 4.30 and it was crazy fun.

Do you want crazy torque and high rpms? Then go with a 3.73 or more. Or just mild torque and slower revving? Then maybe a 3.27 or less is more what you want.

[Sh0gun!]

I'm kind of pushing towards the 3.73, but what was it like with the 4.30 in there? If I put either of these in here would i feel any difference.

thanks much

[innrkid]

Originally Posted by Sh0gun! Originally Posted by innrkid Why? Change one gear...your rear end. Sorry I'm new to this, but at least I know I'm the intelligent one in this conversation.

WTF?

I try and help you and you drop this shot back?

FOAD

[Sh0gun!]

Don't make it sound like a insult when you're saying it then I'm sorry i took it the wrong way though. it sound sorta like something my dumb ass friends would say to me and I'm use to that.

so sorry again man

[impetus]

Originally Posted by 99mustang232 your mustang came with the TR3650 manual transmission with a new 5th gear ratio for improved fuel economy which adds an extra 2mpg on the highways, but equally important in picking the appropriate rear gear ratio. 2005+ Mustang (Tremec 3650) 1- 3.34:1 2- 2.00:1 3- 1.32:1 4- 1.00:1 5- 0.68:1 reverse- 3.38:1 2005+ Mustang (5R55S) auto 1- 3.25:1 2- 2.44:1 3- 1.55:1 4- 1.00:1 5- 0.75:1 reverse- 3.07:1 if i'm not mistaken the 5th gear was .62 for the tr3650 in previous mustangs?

these are the numbers i found on the 3650.

1st 3.38
2nd 2.0
3rd 1.32
4th 1.0
5th .62, .68, or .74!