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First generation 5EAT vs second generation 5EAT


godwhomismike

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The 335I uses the Steptronic gearbox which is a great fast shifting auto gearbox. The SMG is not used on the 335I's.

 

On that note Subaru needs to introduce a DSG type gearbox.

 

yeah. i think i read somewhere something about 100ms shifts. according to subaru the new 5eat is either .2 or .3 seconds. pretty quick overall i say.

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I have an 08 LGT with a 5EAT.

 

Is the shift quicker? Yes and No. I would say the acutal shift from gear to gear is quick, but the "command" to change/shift gears is slow. Using the auto mode and letting it do its thing accerlating from a stop is fine, but if youre up to speed, and press the accelerator to down shift to pass someone, the shift seems to take a while. Same goes for the sport shift mode for manually shifting. When I accelerate in sport shift, and use the paddles or stick, I have to up shift early. It seems like the RPM's will rise by 1500 or so before the transmission will actually shift gears.

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I have an 08 LGT with a 5EAT.

 

Is the shift quicker? Yes and No. I would say the acutal shift from gear to gear is quick, but the "command" to change/shift gears is slow. Using the auto mode and letting it do its thing accerlating from a stop is fine, but if youre up to speed, and press the accelerator to down shift to pass someone, the shift seems to take a while. Same goes for the sport shift mode for manually shifting. When I accelerate in sport shift, and use the paddles or stick, I have to up shift early. It seems like the RPM's will rise by 1500 or so before the transmission will actually shift gears.

 

Mine was like that, but it has learned my (bad) habits. There was a delay in the upshifting and there were a few times I bounced off the limited because of this.

I wonder if it is a little quicker than the '05, or did all the new electronics slow it down a little.

 

.

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This is true to certain extend. The dyno has also shown that 5EAT puts down less power than the 5MT.

 

 

it's has even been posted by a tuner that due to gear ratio differences you can not directly compare them.

 

think about it. shorten the ratio on any sti 3rd gear and tell me if you will get more/less power just from doing that.

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This is true, and I am dying to test drive an 08 LGT w/ 5EAT to verify if it is indeed quicker.

 

/

 

it wont matter. they regeard the final drive to make it slower. quicker shiting with a slower ratio. funny though. the 3.0r got the quicker tranny gearing. other wise it woul dbe even slower than it is now.

 

unfair to the gt owners imo. also, imo, it's another way that subaru says f**k you to the years previous customers. seems like they have the start of a fine package but then go out of their way to f**k it up severely. WHY!!!!???

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Ok to catch up here and put this thread into perspective.

 

According to Richard B, he claims that the 5EAT is revised completely on the 2008 models so that the gears are set to slow up the 5EAT on the GT, where the gearing on the 3.0R is changed in a way to make it quicker.

 

What are the gear ratios of the 05-07 5EAT vs the 08 5EAT (GT vs 3.0R)

 

.

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Ok to catch up here and put this thread into perspective.

 

According to Richard B, he claims that the 5EAT is revised completely on the 2008 models so that the gears are set to slow up the 5EAT on the GT, where the gearing on the 3.0R is changed in a way to make it quicker.

 

What are the gear ratios of the 05-07 5EAT vs the 08 5EAT (GT vs 3.0R)

 

.

 

nooooo...

 

the final drive for the 08 gt is geared slower than the 05-07. the 1-5 ratio is the exact same.

 

the

3.0r got the exact same final drive and the 1-5 gear ratio as 05-07gt's.

 

BUT...the new tranny supposedly shifts much quicker. so that alone may make up for it. i dunno. AND if subaru dropped in a better turbo...just speculating now.

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For your reference:

 

2006 2.5 GT

5spd automatic

1st 3.540

2nd 2.264

3rd 1.471

4th 1.0

5th 0.834

final reduction 3.272

 

2008 2.5 GT

5speed automatic Sportshift

1st 3.540

2nd 2.264

3rd 1.471

4th 1.0

5th 0.834

final reduction 3.083

 

2008 3.0R

5speed automatic Sportshift

1st 3.540

2nd 2.264

3rd 1.471

4th 1.0

5th .834

final reduction 3.272

 

 

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For your reference:

 

2006 2.5 GT

5spd automatic

1st 3.540

2nd 2.264

3rd 1.471

4th 1.0

5th 0.834

final reduction 3.272

 

2008 2.5 GT

5speed automatic Sportshift

1st 3.540

2nd 2.264

3rd 1.471

4th 1.0

5th 0.834

final reduction 3.083

 

2008 3.0R

5speed automatic Sportshift

1st 3.540

2nd 2.264

3rd 1.471

4th 1.0

5th .834

final reduction 3.272

 

 

interesting. looks like the gearing is all the same, but the 08 LGT has a slightly quicker shift time. the 3.0R is the same as the previous 5EATs.

Wiggle wiggle wiggle wiggle wiggle yeah!!!
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wouldn't the lower final gear means that the 08 lgt can hit higher top speed? if the limiter was removed?

 

Theoretically, but I don't believe the stock LGT has enough power to reach the limit of the gearing. IIRC the the '05-'07 gearing tops out at ~180+ mph, '08 would be about 5% higher.

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I've driven the '08 5EAT. The shifts are smoother, but I wouldn't say any faster.

 

Also it was a different story driving a stock '08 5EAT and my Stage 1 5EAT.

 

The rev matching is really the only thing that works better with the torque converter.

 

Until a '08 5EAT is dyno'ed, we really won't know.

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Theoretically, but I don't believe the stock LGT has enough power to reach the limit of the gearing. IIRC the the '05-'07 gearing tops out at ~180+ mph, '08 would be about 5% higher.

 

 

165 by the calculator that i used,. that is right at 6500 redline on stock gearing, stock tire size.

 

ps, forgot to mention...for the 07.

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165 by the calculator that i used,. that is right at 6500 redline on stock gearing, stock tire size.

 

ps, forgot to mention...for the 07.

 

 

215/45/17 tires = 77.3" cir

 

For '07 5EAT 5th = 0.834, Final = 3.272:

6500 rpm * (60 min/hr) * (77.3/12/5280 mile) / 0.834 / 3.272 = 174.4 MPH

 

For '08 5EAT 5th = 0.834, Final = 3.083:

6500 rpm * (60 min/hr) * (77.3/12/5280 mile) / 0.834 / 3.083 = 185.1 MPH

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215/45/17 tires = 77.3" cir

 

For '07 5EAT 5th = 0.834, Final = 3.272:

6500 rpm * (60 min/hr) * (77.3/12/5280 mile) / 0.834 / 3.272 = 174.4 MPH

 

For '08 5EAT 5th = 0.834, Final = 3.083:

6500 rpm * (60 min/hr) * (77.3/12/5280 mile) / 0.834 / 3.083 = 185.1 MPH

 

 

oops. sorry. you is correct. dunno what i used last time i did it.

 

anyways...

 

http://www.catherineandken.co.uk/sti/tyres.html

 

1st 3.540

2nd 2.264

3rd 1.471

4th 1.

5th .834

final reduction 3.272

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