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Gear ratios???? Please explain

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Old Nov 12, 2006 | 07:48 PM
  #1  
jeep93scl's Avatar
jeep93scl
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Default Gear ratios???? Please explain

I hear everyone talking about changing their gears. Sorry but im kinda stupid when it comes to this can someone explain. i have 2001 GT 5sp i drive it about half the week just wanna get more power.

thanks
Old Nov 12, 2006 | 07:52 PM
  #2  
mustangman02232's Avatar
mustangman02232
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From: Ludlow, Mass
Default RE: Gear ratios???? Please explain

it makes the power band come up faster, basically, its like downshifting on a 10 speed bike id say go with 4.10s unless you have teh t3650 tranny then i would go 4.30s, how many bolts are on the valve covers to find out?
Old Nov 12, 2006 | 08:00 PM
  #3  
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jeep93scl
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Default RE: Gear ratios???? Please explain

im not sure i would have to look. whats the other tranny that ford used for the 2001 mustang? i dont think it was the tranny u brought up
Old Nov 12, 2006 | 08:04 PM
  #4  
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shifterdelux
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Default RE: Gear ratios???? Please explain

They are talking about their rear differential ratios, or rack and pinion ratios. In the rear of your car there is a differential, and it has a gear inside. You might see gear ratios reffered to as: 3.27, 3.55, 3.73, 4.10, 4.11, etc.

What that means is that for a single axle spin, drive shaft will spin 3.27 times, so it is said to be 3.27 to 1, or 3.55 to 1, etc, etc.


Such action multiplies torq. Your stock gear ratio is 3.27 (most likely), let say that in 1st gear your speed range is 0 mph to 35 mph, when you increase axle to differential ratio, your 1st gear speed range will be less, lets say 0 mph to 25 mph. Thus you will deliver all your engine power in lesser speed range (and lesser distance), that means faster acceleration.

Trade off is that you will loose your top end speed, your highway and cruising RPM will go up, and your fuel mileage will go down. But your car will be more fun to drive, and harder too. You will need upgraded shifting skills, and be a better all around driver to keep traction.

3.73 gears are recommended for most, with 4.10 you need tire upgrade to keep traction.



You can pick up a set of gears, used start at $60, new are more. Then install them yourself to save money. If you live anywhere near me, let me know, I want to swap my gears too.
Old Nov 12, 2006 | 08:12 PM
  #5  
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jeep93scl
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Default RE: Gear ratios???? Please explain


ORIGINAL: shifterdelux

They are talking about their rear differential ratios, or rack and pinion ratios. In the rear of your car there is a differential, and it has a gear inside. You might see gear ratios reffered to as: 3.27, 3.55, 3.73, 4.10, 4.11, etc.

What that means is that for a single axle spin, drive shaft will spin 3.27 times, so it is said to be 3.27 to 1, or 3.55 to 1, etc, etc.


Such action multiplies torq. Your stock gear ratio is 3.27 (most likely), let say that in 1st gear your speed range is 0 mph to 35 mph, when you increase axle to differential ratio, your 1st gear speed range will be less, lets say 0 mph to 25 mph. Thus you will deliver all your engine power in lesser speed range (and lesser distance), that means faster acceleration.

Trade off is that you will loose your top end speed, your highway and cruising RPM will go up, and your fuel mileage will go down. But your car will be more fun to drive, and harder too. You will need upgraded shifting skills, and be a better all around driver to keep traction.

3.73 gears are recommended for most, with 4.10 you need tire upgrade to keep traction.



You can pick up a set of gears, used start at $60, new are more. Then install them yourself to save money. If you live anywhere near me, let me know, I want to swap my gears too.

thank you for the detailed explination. i dont live near u im in pittsburgh pa (currently watching the steelers get beat by the staints) im moving to california by the end of the month and debating on selling my car and than getting a new one. but my car is almost paid off only about 700 bucks left on it. as for the gears i dont think a 4.1 is needed fo rmy application but 3.73 sound good.
Old Nov 12, 2006 | 08:27 PM
  #6  
mustangman02232's Avatar
mustangman02232
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Joined: Dec 2004
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From: Ludlow, Mass
Default RE: Gear ratios???? Please explain

the other tranny was teh t45 4.10s are sweet, you will kick yourself for 3.73s
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