What Gears Should I get?
#11
RE: What Gears Should I get?
Your rear has a Limited Slif Differential. Trust me when I say this is fine for most people.
With 4.10s, you'll be able to break it loose a little easier but it's not gonna happen unless your mashing the throttle and alot of it depends on what kind of rubber your wheels are wearing.
Overdrive works like this. It's only on when you're NOT mashing the throttle and you're traveling at a decent speed (like say 55). It's a quieter and more fuel efficient gear. When you go to pass someone and you press the pedal, it may usually downshift and you'll hear the engine sound louder (more RPMs). It'll return to O/D as soon as you're driving regularly.
Now, how 4.10s will affect your car is simple, it'll budge more in any gear, at a given RPM. This is good however it also shortens the range of each gear. This is why people are recommending much moves than 4.10s. It will give you a distinct seat-of-the-pants improvement and it will speed your car up with very few trade-offs.
Gas milage will only suffer on long trips where sustained driving in O/D at say, 70 mph will utilize slightly more gas. This is because your engine is turning at a higher RPM in every gear. This tradeoff is mild and acceptable to the majority of performance minded enthusiests. Ford wanted to list better highway miles-per-gallon when then advertised and sold the car which is probably the only reason they choose such a small gear in the first place. Gears "Wake the car up"
With 4.10s, you'll be able to break it loose a little easier but it's not gonna happen unless your mashing the throttle and alot of it depends on what kind of rubber your wheels are wearing.
Overdrive works like this. It's only on when you're NOT mashing the throttle and you're traveling at a decent speed (like say 55). It's a quieter and more fuel efficient gear. When you go to pass someone and you press the pedal, it may usually downshift and you'll hear the engine sound louder (more RPMs). It'll return to O/D as soon as you're driving regularly.
Now, how 4.10s will affect your car is simple, it'll budge more in any gear, at a given RPM. This is good however it also shortens the range of each gear. This is why people are recommending much moves than 4.10s. It will give you a distinct seat-of-the-pants improvement and it will speed your car up with very few trade-offs.
Gas milage will only suffer on long trips where sustained driving in O/D at say, 70 mph will utilize slightly more gas. This is because your engine is turning at a higher RPM in every gear. This tradeoff is mild and acceptable to the majority of performance minded enthusiests. Ford wanted to list better highway miles-per-gallon when then advertised and sold the car which is probably the only reason they choose such a small gear in the first place. Gears "Wake the car up"
#12
RE: What Gears Should I get?
ORIGINAL: DROES99STANGOk so after I get the 4:10 gears and I am driving normal, do I have Overdrive on or off. And on the drag I have it off right? When you say OD drops my gear down does that mean I should use OD for regular driving so I don't lose gase mileage? With 4:10's, when I stomp the Gas is it going to be all over the road? also do you know if my 99 gt convertible has full possy stock? or is it slip possy? I don't know much about this whole rear end thing, I am trying to figure it out though, I hope I don't sound like a complete moron. Thanks everyone for your help!!
#14
RE: What Gears Should I get?
#18
RE: What Gears Should I get?
ORIGINAL: Stang0005is this a good package with the gears and tuner??http://www.rpmoutlet.com/newv8m.htm
All you will need with that kit is pinion shims and carrier bearing shim kit if you change the bearings which are supplied with the install kit and of course 2 quarts of good synthetic gear oil and a bottle or 2 of posi additive. I used MOBIL 1 75W-90 but now Ford recommends 75W-140 weight oil which I would have gotten. There is a lot of negative material you can read about Motive gears but it's really the installer's set-up that counts. All I get a is a slight whine, more like a whistle, between 40 & 50 MPH.
If you have trouble in your area finding the pinion shim or carrier shim kit I can get both for you around $30. If you are already happy with the Superchips tune you have you could sell the tuner you get in the package and get the gearset for free though you may need the tuner for some other things which would require that you remove the superchips chip first. I set my auto's shifts for quicker, harder shifting and changed some shift points. A '99-'04 GT isn't going to be a really quick car. However the gears enhanced the driveability of mine. I still have an exhaust to install and will note what the outcome of that is when done. Feel free to PM me with any questions I may help answer. mark
#20
RE: What Gears Should I get?
ORIGINAL: Shawn02GT
oh ???? not another gear thread [sm=headbang.gif]
oh ???? not another gear thread [sm=headbang.gif]
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