They don't make 3.90 gears for our (7.5) rear. There was a noticeable improvement when I put in 3.73s.. so I would think you would really notice 4.10s.
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ORIGINAL: vistastang
If I change the stock gears to maybe a 3.90 or 4.10? I have an 07 pp v6 auto. Real noticable improvement?
There have been many threads from people using 3:90 gears in their 7.5 inchers. I don't understand why mrsandman said that they don't make them. I've got 3:73's but if I were going to do it again, I'd get 3:90's.
< Message edited by 68XR7 -- 3/18/2008 3:19:40 PM >
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There have been many threads from people using 3:90 gears in their 7.5 inchers. I don't understand why mrsandman said that they don't make them. I've got 3:73's but if I were going to do it again, I'd get 3:90's.
< Message edited by MrSandman -- 3/18/2008 3:49:39 PM >
soooooo, If I am going to wait awhile to supercharge this might be the next best "bang for the buck"? I already have CAI, tuner & duals btw. Any guess on what kind of improvements on 0-60 & 1/4?
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quote:
ORIGINAL: 68XR7
There have been many threads from people using 3:90 gears in their 7.5 inchers. I don't understand why mrsandman said that they don't make them. I've got 3:73's but if I were going to do it again, I'd get 3:90's.
no one makes 3.90 gears for our 7.5 rears. GM offers them for a 7.5 rear end, but they dont fit (obviously). they do make a 3.90 for the 8.8 though. i looked everywhere for a 3.90 gear before i decided on my 4.10, i wouldve gone that route if i couldve found them.
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my gears are finally broken in and my stang really feels like a performance car now. what a tune does for a CAI, gears do for a tune. you really get to experience the powerband much more than before. the acceleration is awesome and i just have 3.73's. i love my setup.
Totally agree.. A the CAI/Tune/3.73 and t-lok combo totally transforms the way this car drives (as it should). The all around experience is much better. A CAI and tune are great.. but adding the t-lok and gears does something special to the overall combination.
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ORIGINAL: Sancho805
my gears are finally broken in and my stang really feels like a performance car now. what a tune does for a CAI, gears do for a tune. you really get to experience the powerband much more than before. the acceleration is awesome and i just have 3.73's. i love my setup.
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Joined: 5/11/2005 From: Newark, DE USA Status: offline
When deciding on gears, you need to consider the rear tires you plan to use. If you are keeping the stock size tires (27" dia), then your gearing will be unaffected by the tires. Running a shorter or taller tire will affect your gearing. With my 28" dia DR's and 4.10:1 gears, my final gearing is a calculated 3.95:1. If I went to a 26" dia DR, my effective gearing would be a calculated 4.25:1 ratio. So for those folks thinking of swapping tires/wheels down the road, give some thought to the tire diameter before you decide on gears.
EDIT - Here's a link to calculating final effective gear ratio with different size tires:
Did you have to get the car re-tuned after the gears and t-lok? Or was it just install and go... What about the gauges? Just curious since that's still in my list of "non-cosmetics" to do to my car and get me in more trouble :P
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ORIGINAL: xyster
Did you have to get the car re-tuned after the gears and t-lok? Or was it just install and go... What about the gauges? Just curious since that's still in my list of "non-cosmetics" to do to my car and get me in more trouble :P
yea... your car has to be tuned to your specific gears otherwise your speedomoter will be significantly off
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quote:
ORIGINAL: wolfpup
quote:
ORIGINAL: xyster
Did you have to get the car re-tuned after the gears and t-lok? Or was it just install and go... What about the gauges? Just curious since that's still in my list of "non-cosmetics" to do to my car and get me in more trouble :P
yea... your car has to be tuned to your specific gears otherwise your speedomoter will be significantly off
With my SCT xcal2 handheld tuner, I have the ability to change the optional parameters for things like different size tires, gear ratios, shift firmness, shift speed, etc. But my tuner (Evolution) didn't lock out those parameters. I've heard that some tuners have locked them, which prevents the user from making those changes. IMO, that stinks. I change my "tire revs per mile" frequently when I swap out my drag radials (28" dia, versus the Pirelli's which are 27" dia). I'd be in a pinch if I couldn't change the parameters each time.
I'm not sure which tuners lock out those features. Can anyone comment on their experience with different tuners?
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rear gear change--how much of a difference in performance? - 
