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Thread: Downshifting at speed in sport mode

  1. #1
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    Default Downshifting at speed in sport mode

    If I'm cruising along the highway at, say, 75 in 5th in sport mode and need/want more speed quickly is it OK on the tranny to tap it down to 4th and accelerate? IF so, is there a top-end speed for 4th (aside from hitting the redline in RPM's)?
    2009 SRM GT: Cortex tuned, Spectre Intake, VMAX ported TB, Solo HFC's, X-pipe, Solo axle-back, a few bling pieces under the hood, Billet Custom catch can, Holden radiator cover, "SV6" wing spoiler, GXP diffuser, rear window roof spoiler, "PONTIAC" 3rd brake light insert, Holden V8/6.0 Liter badges, Holden chrome trunk strip, VG shark fin, All-Fit Auto lower front lip, drilled & slotted rotors, painted calipers, Ultra-guage, custom-made "dead pedal".

  2. #2
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    Sure it is. 4th goes well over 100 mph. 3rd goes just over 100 I think. It'll probably balk if you tried to shift to 2nd.
    09 G8 GT SRM Premium Sport Sunroof



    HSV GTS Triple Gauge Pod, GXP Rear Sway Bar and Diffuser, HSV SuperSport Steeringwheel, SOLO axlebacks, Red Hot Shift Knob, Autodim Mirror, Hood Vent Mod, Removed Intake Cover, Rotofab CAI, Cortex, Infiniti speakers, Pioneer Sub & Amp

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  3. #3
    Beyond Help texn884's Avatar
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    Just dont keep your hand on the gear shift if your in manual mode going from 2 gear going about 35-40 because it will throw you back and your hand will drop it to first gear and go wide open, as I did by mistake a few summers ago in OKC getting on I35 and it took a second or two to figure out what I did and did a fast upshit or two.

    Lots of noise and not going anywhere, what a dumb ass I was, but lesson learned. Not one of my finer moments, lol
    2009 Panther Black Metallic "The Black Rat"
    Current Modifications: Front end, Roof Pillars & Front top of roof has Clear Shield, Holden V8 6.0 Badges, Holden V Trunk Badge from Crazy Paul, UPR Catch Can, Corsa Exhaust & Roto Fab CAI. Spare Tire and Jack and Tinted Window's, hood scoops gutted, Poor Mans Heater Hose modification (holding up the hoses with zip ties), Painted the front dart to Panther Black.

    Patrick Guerra's Tune July 12, 2010: 345 HP, 355 Torque on 87 Octane
    Patrick's & Kurt's install of Kooks Long tubes 1 7/8" w/Corsa Connection Pipes
    11-3-10: 362 rwhp, 372 Torque and updated engine and transmission tune.

    New Engine as of 10- 5, 2011. Patrick & Kurt's tune and dyno 10-19 2011:363 rwhp, 365 Torque 93 octane.
    Sounds so GRRRR8 BECAUSE RACE CAR

    7-1-14 Brembo Front Brake upgrade & Bohnam Front Splitter installed Curt here

  4. #4
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    Thanks for the replies. I'd like to think I know a fair amount about cars (done a lot of repairs/upgrades myself over the years) but transmissions remain somewhat of a mystery to me and I just wanted to be sure.
    2009 SRM GT: Cortex tuned, Spectre Intake, VMAX ported TB, Solo HFC's, X-pipe, Solo axle-back, a few bling pieces under the hood, Billet Custom catch can, Holden radiator cover, "SV6" wing spoiler, GXP diffuser, rear window roof spoiler, "PONTIAC" 3rd brake light insert, Holden V8/6.0 Liter badges, Holden chrome trunk strip, VG shark fin, All-Fit Auto lower front lip, drilled & slotted rotors, painted calipers, Ultra-guage, custom-made "dead pedal".

  5. #5
    Beyond Help texn884's Avatar
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    the transmission are pretty tuff in our cars
    2009 Panther Black Metallic "The Black Rat"
    Current Modifications: Front end, Roof Pillars & Front top of roof has Clear Shield, Holden V8 6.0 Badges, Holden V Trunk Badge from Crazy Paul, UPR Catch Can, Corsa Exhaust & Roto Fab CAI. Spare Tire and Jack and Tinted Window's, hood scoops gutted, Poor Mans Heater Hose modification (holding up the hoses with zip ties), Painted the front dart to Panther Black.

    Patrick Guerra's Tune July 12, 2010: 345 HP, 355 Torque on 87 Octane
    Patrick's & Kurt's install of Kooks Long tubes 1 7/8" w/Corsa Connection Pipes
    11-3-10: 362 rwhp, 372 Torque and updated engine and transmission tune.

    New Engine as of 10- 5, 2011. Patrick & Kurt's tune and dyno 10-19 2011:363 rwhp, 365 Torque 93 octane.
    Sounds so GRRRR8 BECAUSE RACE CAR

    7-1-14 Brembo Front Brake upgrade & Bohnam Front Splitter installed Curt here

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