I think on the 6-spd the transmission only shifts once to get to 60 and now with the 8-spd it needs to shift twice to get to 60 and that's why it's slower. At least that was the case with the 2IS vs 3IS, that's why the older IS350 can run in the 4 sec.

I don't know folks with the 2013 GS 6-spd, do u run faster than our 14+?

 

It would be intresting, most 6 speeds are awd, but weigh more. They may be able to get off the line faster, I need to run mine at the track by me one of these days.

 

If you go look at magazine tests, the 2013 RWD with the 6 speed would often test in the 5.4 to 5.5 second range to 60. If you look at the 2014+ tests with the 8 speed RWD model, you're looking at 5.8 seconds.

AWD models seem to be holding at about 5.6 seconds.

In the IS350 test reviews, the 6 speed AWD models tend to outperform the 8 speed RWD models, at 5.3 seconds AWD to 5.6 seconds RWD.

 

2nd gear for both the 6-speed and the 8-speed transmission. The 8-speed upshifts to 3rd gear just above the 60 mph mark.

~~~~~~~~~~~~~~~~~~~~~~~~~~~

Lexus GS 350 (6-Speed)
Below are ground speeds at 6,500 RPM engine redline for all 6 gears (RWD - A760E 6-Speed Automatic):
(*Speed limiter is electronically governed at 142 MPH preventing max speed of ~170 MPH • **Engine will not reach redline in 5th or 6th gear)

1st Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 3.615
1st Gear Ratio: 3.52
Engine RPM: 6500 Redline = 41.6970892440055 MPH (Up-Shift Engages 2nd Gear @ 3940 RPM)

2nd Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 3.615
2nd Gear Ratio: 2.043
Engine RPM: 6500 Redline = 71.84226830097863 MPH (Up-Shift Engages 3rd Gear @ 4650 RPM)

3rd Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 3.615
3rd Gear Ratio: 1.401
Engine RPM: 6500 Redline = 104.76356469585963 MPH (Up-Shift Engages 4th Gear @ 4845 RPM)

*4th Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 3.615
4th Gear Ratio: 1.000
Engine RPM: 6500 Redline = *146.77375413889936 MPH

**5th Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 3.615
5th Gear Ratio: 0.717
Engine RPM: 6500 Redline = **204.7053753680605 MPH

**6th Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 3.615
6th Gear Ratio: 0.586
Engine RPM: 6500 Redline = **250.46715723361663 MPH

6th Gear - 50% of Redline:
Engine RPM: 3250 = 125.23 MPH

Maximum Torque: 277 ft-lb @ 4,800 RPM
Maximum Horsepower: 306 SAE net @ 6,400 RPM


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lexus GS 350 (8-Speed)
Below are ground speeds at 6,500 RPM engine redline for all 8 gears (RWD - AA81E 8-Speed Automatic):
(Speed limiter is electronically governed at 142 MPH preventing max speed of ~170 MPH • **Engine will not reach redline in 6th, 7th or 8th gear)

1st Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 2.937
1st Gear Ratio: 4.596
Engine RPM: 6500 Redline = 37.66565457305995 MPH (Up-Shift Engages 2nd Gear @ 3855 RPM)

2nd Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 2.937
2nd Gear Ratio: 2.724
Engine RPM: 6500 Redline = 63.55042159243155 MPH (Up-Shift Engages 3rd Gear @ 4440 RPM)

3rd Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 2.937
3rd Gear Ratio: 1.863
Engine RPM: 6500 Redline = 92.92074525914309 MPH (Up-Shift Engages 4th Gear @ 5110 RPM)

4th Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 2.937
4th Gear Ratio: 1.464
Engine RPM: 6500 Redline = 118.24545656952431 MPH (Up-Shift Engages 5th Gear @ 5465 RPM)

5th Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 2.937
5th Gear Ratio: 1.231
Engine RPM: 6500 Redline = 140.62660310136764 MPH (Up-Shift Engages 6th Gear @ 5280 RPM)

**6th Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 2.937
6th Gear Ratio: 1.00
Engine RPM: 6500 Redline = **173.11134841778357 MPH

**7th Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 2.937
7th Gear Ratio: 0.824
Engine RPM: 6500 Redline = **210.0865878856597 MPH

**8th Gear:
Tire Size: 265/35 x 19" = 82.6" Circumference
Final Drive Gear: 2.937
8th Gear Ratio: 0.685
Engine RPM: 6500 Redline = **252.717296960268 MPH


8th Gear - 50% of Redline:
Engine RPM: 3250 = 126.35 MPH

Maximum Torque: 277 ft-lb @ 4,800 RPM
Maximum Horsepower: 306 SAE net @ 6,400 RPM

~~~~~~~~~~~~~~~~~~

 

That means the GS is too heavy? Maybe I need to remove my steering wheel again.. or my shifter in this case and see if this car can shift faster.

 

So I just sold my 2008 IS 350 (6 speed) for a 2015 FSport (8 speed), and yes the IS350 was a little rocket (especially with the right tires), but I enjoy driving this GS FSport quite a bit more. The driving experience, as a whole, is just much more refined, enjoyable, yet still invigorating.

 

Has anyone dealt with NAVTOOL? I know this question is off the point but I'm curious.
They claim to have OEM cell phone mirroring equipment with front, rear and side camera input capability.