2010 Mazdaspeed3 transmission fit into a 2008?

[H3br3w_Ham3r]

Since drivetrain has remained almost identical I wonder If a 2010 tranny with the taller first and second gears would fit into my 2008. I would love a little taller 2nd gear for auto crossing!

 

[Nliiitend1]

I would imagine it might be as simple as buying an updated gearset and installing it into your transmission. It's highly unlikely that anything but the gears inside it were changed....

I've yet to see any real specs published to be able to directly compare ratio differences...But if they only changed certain gears then my hypothesis is probably correct.

 

[H3br3w_Ham3r]

Ya that would probably be a better solution than replacing the entire tranny lol. Realized that after I posted and realized it wouldn't be as expensive as I thought.

 

[phantom6294]

I've yet to see any real specs published to be able to directly compare ratio differences...But if they only changed certain gears then my hypothesis is probably correct.

The gear ratios are available on Mazda's website... :huh:

Here are the ratios ('07-09 / '10)
1st: 3.538 / 3.21
2nd: 2.238 / 1.91
3rd: 1.535 / 1.37
4th: 1.171 / 1.03
5th: 1.085 / .95
6th: 0.853 / 0.79
Final (1st-4th): 3.941 / 4.19
Final (5th-6th): 3.350 / 3.46

Don't forget, they also changed the tire size from 215/45R18 to 225/40R18.

In the end, the overall percentage of change (combining gear ratio, final drive and tire size) is:

1st: +1.72%
2nd: +7.92%
3rd: +3.20%
4th: +4.71%
5th: +8.29%
6th: +2.37%

The gear change means the '10 can hit 60MPH in 2nd gear, but not until 6500 RPM. This is generally well after the throttle has been closed by the ECU. However, it may still help 0-60 times. Also, the '10 can hit 100MPH in 4th gear at 5,800 RPM. Assuming the '10 has similar acceleration in the 1/4, it may be that the '10 can hold 4th for the 1/4 mile giving it a slight advantage.

However, this is pure speculation as I don't know how much of an affect the increased gear ratio means -- taller gear means less acceleration. However, as we all know, 1st and 2nd gear already have traction issues, so the taller gear may help reduce that and actually put power down and help. Again, more speculation.

If you're curious about '10 gears (including final drive) in a '07-09 with the stock '07-09 tires:

1st: +3.67%
2nd: +10.21%
3rd: +5.39%
4th: +6.93%
5th: +10.58%
6th: +4.54%

If I could afford it, and it were possible, I would take 1st and 2nd gear and 6th gear from the '10 and keep everything else. I think this would be a good mix, but of course, this is based 'on paper engineering' which may or may not play out in the real world.

Notice: I am not perfect... I may well have messed up the math. Don't jump down my throat. Also, I have gear ratios going to three decimal places for the '07'09 and only two decimal places for the '10. This may skew the numbers slightly. Again, don't jump down my throat.

 

[Stotrupp]

It's gears 2-5th that have been changed in the 2010.

3 gear changes still required for a fast 60mph. I believe edmunds and motortend tested the 2010, 6.1sec 0-60 vs. 5.7sec for the 1st gen. Car and Driver has the 1st gen running 5.4 0-60

5 gear changes still required for a fast 1/4. No body home after 5500rpm, a faster time will result with a quick shift to 5th@5.5k vice riding out forth most likely.

I've driven the 2010 and could hardly tell a differance in the gear ratios. So small and insignificant it wouldn't be worth the money/headache.

 

[Sport6]

2010:
1st 3.214
2nd 1.913
3rd 1.366
4th 1.025
5th 0.948
6th 0.79
Reverse 3.456
Final Drive 1-4th: 4.187; 5-6th:3.526

2007-2009:
1: 3.538
2: 2.238
3: 1.535
4: 1.171
5: 1.085
6: 0.853
Reverse: 3.831
Final drive: 1-4th: 3.941, gear 5-6th:3.350

 

[TheMAN]

I'm sure you can outright just swap the whole tranny in... it's the same tranny code

 

[MSMS3]

I haven't crunched the numbers on what I'm about to suggest, but we might benefit from going to shorter tires but a little wider tires on front (smaller height) and launching in second gear. lol. It would be cheaper than messing with the tranny. Just an off the cuff thought.

 

[H3br3w_Ham3r]

I haven't crunched the numbers on what I'm about to suggest, but we might benefit from going to shorter tires but a little wider tires on front (smaller height) and launching in second gear. lol. It would be cheaper than messing with the tranny. Just an off the cuff thought.

I want a higher top speed in 2nd though. I don't have time to get to third in an auto-x

 

[peeaanuut]

getting out of 2nd in the canyons sometimes sucks too. Alot of the tighter stuff I run is s*** on the tranny. I get into 3rd just in time to pop back into 2nd. Ill have to keep an eye on this to see how it progresses.

 

[TheMAN]

faster sometimes to just hang in the lower gear than shifting and downshifting again not long after

 

[Mid_Life_Crisis]

For canyon running and probably autocross, it looks like swapping all the gears but keeping the final drive ratios intact would be the way to go. The car has too much torque in low gears as it is and that would get more speed out of each gear before shifting. In addition, the more evenly spaced gears 2 through 5 (where you do most of your work) should be beneficial.
I have no idea what the internals of this transmission look like. Is it possible to make a swap like that?

 

[pdximportracer]

Hmm.. perhaps the 2010 gears w. the 2007/9 finals since there final drives are longer. For a car like mine at 320ish eventually shooting for 400 that could make a HUGE difference. I could finish the 1/4 in 4th at 123!! If you have a tune or an AP the throttle won't close but the head/cams are not effective up there. Now time to get some head work done...

RPM 1st 2nd 3rd 4th 5th 6th
1500 9 15 21 28 34 41
2000 12 20 28 38 46 55
2500 15 25 35 47 57 69
3000 18 30 43 57 69 82
3500 21 35 50 66 80 96
4000 24 41 57 76 91 110
4500 27 46 64 85 103 123
5000 30 51 71 95 114 137
5500 33 56 78 104 126 151
6000 36 61 85 113 137 165
6500 39 66 92 123 149 178
7000 42 71 99 132 160 192
7500 45 76 106 142 171 206
8000 48 81 114 151 183 219

Tire Width 245
Tire Aspect Ratio 45
Wheel Diameter 17
Tire Diameter 25.68
Tire Circumference 80.68

Gear Ratios
1st 3.214
2nd 1.913
3rd 1.366
4th 1.025
5th 0.948
6th 0.79
Final Drive 1-4 3.941
Final Drive 5-6 3.526

 

[SRTCE142]

If I could afford it, and it were possible, I would take 1st and 2nd gear and 6th gear from the '10 and keep everything else.

i doubt that's possible. The only way that it could be possible is if, and only if, the sum of the teeth on the input shaft gear plus the number of teeth on the output shaft gear remained the same between gen1 and gen2.

either way - in order to get the gear set w/o spending a lot of $$$, you'll likely have to get the entire tranny out of a wrecked car. So you might as well just swap the entire tranny and be done with it

 

[MATX]

Iam sure it wont bolt up right, at least not to the speed6 but would the gearing internals be the same could ya just slap em in the transmission anyone seen a spot to buy just the gears I would be wiilling to have it done lol.