Upgrading Rearend Gears

Is it worth installing new rearend gears? Will it really improve power and acceleration for the money it costs? i was thinking about installing SLP's Ring and Pinion with the 3.73 ratio.

Good choice in size. They worth the money.

quote:

ORIGINAL: 02StanGT

Good choice in size. They worth the money.

 
What he said. And it's fine if you're not gonna add too much horsepower, these rearends aren't that strong.

thanks guys.

what i was told when i was doing mine was if you go with a GM gear, they will be quieter than any aftermarket.  something to think about but a 3:73 would be good for your car

i would get a torque converter with the money before gears u will see more out of it then u will the gears...

You did not state what car, engine, tanny and present rear gear ratio.  Anyone asking about gear changes before other mods are reading too many post on that subject.  Some of the basic reasons are: 
1) parts are expensive along with the install labor.
2) if the correct cut of gears are not selected, noise problems will occur.
3) NOT a DIY type of job for anyone and problem will happen if not done by the book.
4) If you don't have the horses up front a gear change is a waste.
 
One of the above posts suggested a Torque Converter and I agree.  Just so it in a reasonable range (2500 rpm's) for a daily driver.

i'm going to ask something stupid, but something i've been wanting to know for a while now. You don't have a torque converter if you have a manual do you?

quote:

ORIGINAL: armynatguard18

i'm going to ask something stupid, but something i've been wanting to know for a while now. You don't have a torque converter if you have a manual do you?

 
Automatic tanny= Torque converter
Manual tanny= Clucth

i have a 2002 ss, auto transmission, with the 345 hp package, 3:23 ratio no modifications done yet. should I do my exhaust system first?

I would say 3.73 would be a good mod for your car.

u dont need to do power before gears.  lemme put it to u this way, mustangs regularly see fair gains from gear swaps,a nd a full bolton mustang is still shy of the power of a stock ls1.  and they go bigger, 2.73 to 3.73 or 4.10, as opposed to 3.42 to that.  so u can do gears whenever.  however for some bigger mods you MUST have gears or the car will hang forever in the low rpm. 

So if i have a stock car, should I start off with getting a new exhaust system, then air intake, and then new gears? When should i put in new suspension upgrades to support the power?

It's fine to put gears in whenever you'd like.

As long as you have good traction you can probaly knock off about two or three tenths off your 1/4 time depending on how high you go 3.73 are good all around and 4.10s are a little more for the track but guys do run them with no problem on the street. i have seen mustang guys run up to 4.56s on the street but thats not recomended..

What exactly will a torque converter do for my car, sorry never heard of one. thanks for all of your help.