Is AT V accelerate faster than MT V?
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2009-2014 Cadillac CTS-V Performance Mods Discussion, Is AT V accelerate faster than MT V? in Cadillac CTS-V Series Forum - 2009-2014; Is that true? Why? Because gear ratio? But AT V is heavier,right? So that's why many AT V on drag ...
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    Eswat is offline Cadillac Owners Member
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    Is AT V accelerate faster than MT V?

    Is that true?
    Why? Because gear ratio?
    But AT V is heavier,right?
    So that's why many AT V on drag race,even more than MT V?
    I ever found some mod were about hydraulic converter lock ratio,
    it means 6L90 could lock hydraulic converter but it would release when full throttle?

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    Betiwin is offline Cadillac Owners Member
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    Re: Is AT V accelerate faster than MT V?

    Yes V auto is faster. It's more with the autos ability to launch. Also when you decide to Mod her the auto is substantially faster. An auto stage 1 car can run 10's, manuals are just to hard to launch in these cars. If rowing ur own gears is more important than straight line speed than manual is the ticket.

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    Eswat is offline Cadillac Owners Member
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    Re: Is AT V accelerate faster than MT V?

    I know a tuner who able to mod most traditional MT to full paddle-shift, never need clutch pedal again and the shift lever too.
    From beginning, consider about gearbox efficiency ,overall weight, long-term stability, and the reason above, I prefer MT.
    I ever heard V's AT would shift up itself even switch at MT mode, so it means u cannot remain at a gear all the time at V's AT?

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    Random84's Avatar
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    Re: Is AT V accelerate faster than MT V?

    Manual trans cars have a superior rear-end gear ratio, and put slightly more power to the ground with less rotating mass than the heavier automatic transmission (with a big, heavy torque converter spinning around). However the big issue remains "can you shift as fast as an automatic transmission?" I don't know of any human than can... and add in the ability to modify shift pressure, to change out stall/torque converters with lighter, more efficient converters often with a higher stall; and this combo is ideal for drag racing - even with the weight and gearing penalties. The fastest drag racers all use automatic transmissions, period.

    However, for "driving" the car and road/track racing, manual transmissions are clearly preferred for the feel and control factors.

    Just depends on how you want to define "best" and what the purpose of your car is for.

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    matt116 is offline Cadillac Owners Fanatic
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    Quote Originally Posted by Eswat View Post
    I know a tuner who able to mod most traditional MT to full paddle-shift, never need clutch pedal again and the shift lever too.
    From beginning, consider about gearbox efficiency ,overall weight, long-term stability, and the reason above, I prefer MT.
    I ever heard V's AT would shift up itself even switch at MT mode, so it means u cannot remain at a gear all the time at V's AT?


    If you put the AT in M mode it will shift itself until you up or down shift with stick or paddles and it stays in that gear. Then you have to shift manually until you put it back to drive.

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    Mongopush is offline Cadillac Owners Member
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    Re: Is AT V accelerate faster than MT V?

    Quote Originally Posted by matt116 View Post
    If you put the AT in M mode it will shift itself until you up or down shift with stick or paddles and it stays in that gear. Then you have to shift manually until you put it back to drive.
    While in sport mode and manually shifting just hold shifter in up-shift position for around 3 seconds , it will go back to auto shift sport mode.

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    Eswat is offline Cadillac Owners Member
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    Re: Is AT V accelerate faster than MT V?

    Thanks to u all.
    Some AT tuners(like RPM) offer a mod option that to add lockup disks at the hydraulic converter, what's the exactly means?
    I know some hydraulic converter able to lock between engine side&tranny side, the mod seems able to let it lock just like MT's clutch, isn't it?
    So that means original 6L90 is not able to lock hydraulic converter, right?
    I want to say if the hydraulic converter locked,
    it just same as MT but with soft launch(all of hydraulic converter won't lock while launch even itself can do it), by this view of point is make sense that AT car could faster than traditional MT car.

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    Re: Is AT V accelerate faster than MT V?

    Eswat, the lockup function is totally programmable on the auto. You can even keep it locked up through the shifts if you wanted to. It's not recommended because its very hard on the tranny's internals...

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    thebigjimsho is offline Cadillac Owners 10000+ Posts
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    The auto is faster at launch. That's it.

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    Re: Is AT V accelerate faster than MT V?

    Here's a great video...
    Wannago, Wannago, Eswat and 7 others like this.

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    I'll tell you what- that's a light-cutting fool!

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    Gary Wells is offline Cadillac Owners Connoisseur
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    Re: Is AT V accelerate faster than MT V?

    Cad CTS-V2 automatic versus manual trans data (as of 01-02-2012):

    Manual trans (M6): Tremec TR6060 6 speed manual,
    fully synchronized with single overdrive (MG9):
    Gear ratios (:1) 1st: 2.66, 2nd: 1.78, 3rd: 1.30, 4th: 1.00,
    5th: 0.80, 6th: 0.63, final: 3.73, reverse: 2.90

    Gas Guzzler (GG) tax of $1300, or half that of the A6
    Faster by 16 MPH (191 MPH versus 175 MPH (governed))
    A tad slower in the 1/4 & on the street
    A tad better mileage than the auto but probably not significant
    About 32 more RWHP than an A6 on average as measured on a Dynojet
    About 27 more RWTQ than an A6 on average as measured on a Dynojet
    About 95 lbs lighter that the auto
    No remote start feature
    Has “no lift-shift” feature


    Automatic trans (A6): Hydra-matic 6L90E 6 speed
    electronically controlled automatic overdrive with
    torque converter clutch (MYD): Gear ratios: (1 1st:
    4.03, 2nd: 2.36, 3rd: 1.53, 4th: 1.15, 5th: 0.85, 6th: 0.67,
    final: 3.23, reverse: 3.06

    Gas Guzzler (GG) tax of $2600, or twice that of the M6
    Slower by 16 MPH (175 MPH (governed) versus 191 MPH)
    A tad quicker in the 1/4 & on the street
    A tad worse mileage than the manual but probably not significant
    About 32 less RWHP than an M6 on average as measured on a Dynojet
    About 27 less RWTQ that an M6 on average as measured on a Dynojet
    About 95 lbs heavier that the manual
    Remote start feature
    Normal mode initially starts in 1st gear, then starts in 2nd gear thereafter
    Manual mode starts in 1st gear always

    About 1 in every 6 ’09 CTS-V’s were / are manual trans (M6)
    Eswat and Eswat like this.

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    matt116 is offline Cadillac Owners Fanatic
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    Auto for life yo

    Lmfao

    Like I said
    Hard if not impossible to out shift a tuned 6L90E

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    Eswat is offline Cadillac Owners Member
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    Re: Is AT V accelerate faster than MT V?

    Quote Originally Posted by V locity View Post
    Eswat, the lockup function is totally programmable on the auto. You can even keep it locked up through the shifts if you wanted to. It's not recommended because its very hard on the tranny's internals...
    I ever thought about it.
    If engine deliver higher output and hydraulic converter locks, then the issue would come from tranny internals.
    But I don't see too much internal strengthen part or services about 6L90E, like internal clutches, shafts...etc.

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    V locity's Avatar
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    Re: Is AT V accelerate faster than MT V?

    I wouldn't even go there (but parts are there)... We are seeing a correctly tuned 90e hold 1000 HP... These are actually amazing transmissions once you get to know them! The problem is that they are very shy

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