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The Future Of The Manual Transmission

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  • qbrozenqbrozen Member Posts: 33,733
    Yup, trail braking is the only way I know how to drive the GTI. Yet, I feel it oversteers. I've ordered an Eibach front swaybar and will probably install next weekend. I think it might actually help this car.

    '11 GMC Sierra 1500; '98 Alfa 156 2.0TS; '08 Maser QP; '67 Coronet R/T; '13 Fiat 500c; '20 S90 T6; '22 MB Sprinter 2500 4x4 diesel; '97 Suzuki R Wagon; '96 Opel Astra; '11 Mini Cooper S

  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    It's not so easy to trailbrake a FWD car accurately. RWD is a lot easier IMO.
  • volkovvolkov Member Posts: 1,306
    Just finished 2 weeks of driving on the left in the UK. We had a VW Sharan rental van with DSG. I found it quite interesting with a few quirks. Shifting under heavy load such as turning into tight traffic was quite jerky at the 1st-2nd shift with a modicum of torque feedback. I had expected it to be more smooth, and I am (usually) much more slick when shifting myself. I also never knew when it was going to coast freely versus engaging engine braking. Whether on flat ground or going downhill, I never knew what it was going to do, and in fact it always seemed to do the opposite of what I wanted wrt slowing downhill or coasting for FE.
    I really do wish we had some selection of small diesels in NA, but consumers are very closed minded here. It was a small displacement diesel which might make some difference to the drive feel, but it did get great FE for a large vehicle, and it never balked even at 75mph+ on the motorways. Pushing the accelerator meant instant go without any mushiness or delay to downshift, so it gets full A's there.
    I didn't see any lift throttle oversteer nor did I loose traction braking, so I can't comment on those for the current discussion.
  • eliaselias Member Posts: 2,209
    edited August 2011
    coeefficient of static friction is larger than that for sliding friction.
    thusly when the rear tires cut loose due to deceleration, the rearward friction force on front tires is more than that on rear tires. basic force-vector analysis shows that this induces spin: the rear and front are maintaining forward momentum identically but the stuck-to-road front tires are being pushed backwards stronger than the sliding rear tires are being pushed backwards - by the road. this is the force delta which induces the spin.

    aside from reattaining rear traction, the way to avoid spin is to keep the car pointed perfectly straight by countersteering..

    the risk of such a spin is larger in a RWD with manual transmission, but some automatics could probably be forced to do the same thing. software probably prevents it in most modern automatics though.
  • shiposhipo Member Posts: 9,148
    edited August 2011
    Be prepared for an informational message directed toward you alerting you to the fact that you failed Physics; apparently I failed it as well. :P
  • wwestwwest Member Posts: 10,706
    edited August 2011
    If I remember correctly, it's been awhile, this conversation thread began due to my mention of use of the E-brake alone to hold the vehicle "in line" driving downhill on a slippery roadbed. Evolved to someone insisting that a bicycle would want to swap ends with the application of the rear brake only.

    But yes, if you have a situation wherein more braking is applied at the front versus the rear, rear skiding, front not, the rear is likely to try to pass the front, more certainly so on a slippery roadbed. But apply rear braking ONLY, skiding or not, and the behind will stay behind.
  • andys120andys120 Member Posts: 23,669
    But apply rear braking ONLY, skiding or not, and the behind will stay behind.

    Wrong! Anyone who has ever slalomed a car will tell you applying the hand brake kicks out the rear.

    2001 BMW 330ci/E46, 2008 BMW 335i conv/E93

  • lemmerlemmer Member Posts: 2,689
    Even if you are in a perfectly straight line? Can't imagine that situation happens much in a slalom.
  • shiposhipo Member Posts: 9,148
    Are you deliberately being obtuse? Fact, yank a parking brake on any car without a front to rear drive connection (i.e. a FWD or RWD car) and the car WILL SPIN!

    How is it that you don't understand this simple fact?
  • andres3andres3 Member Posts: 13,925
    When I rented a CVT vehicle I didn't find it particularly efficient with my driving style. I'd say the DSG (dual clutch auto manual) transmission makes CVT obsolete for anyone with any sense.

    The only reason you'd choose a CVT over a dual clutch gearbox is if you wanted to be penny wise and pound foolish, and get something cheaper.
    '18 Porsche Macan Turbo, '16 Audi TTS, Wife's '19 VW Tiguan SEL 4-Motion
  • ateixeiraateixeira Member Posts: 72,587
    DSG is expensive and high maintenance, though.

    While I'd prefer a DSG, a CVT is cheaper, requires less maintenance, and arguably is more fuel efficient.
  • andres3andres3 Member Posts: 13,925
    I haven't seen much evidence that CVT is more fuel efficient than DSG. Seems about equal when I look at comparisons that make any sense.

    DSG gearbox oil is expensive ($22/quart x 5.2 if you use the right stuff; it's not ATF or fluid, but oil; just had a change last week), however, it seems it's okay to go 30 to 50K miles per change (hate to admit I let it go 50K miles between changes; oil smelled a bit burnt, but not terribly so). How little maintenance does CVT require? The DSG filter is nothing particularly special or expensive. Most places quote 1 hour labor to change my DSG oil and filter, though I know they should probably figure 2 hours (if they follow Audi's guidelines).

    81K miles, 2006 A3 kicking butt!
    '18 Porsche Macan Turbo, '16 Audi TTS, Wife's '19 VW Tiguan SEL 4-Motion
  • steverstever Guest Posts: 52,454
    edited August 2011
    someone insisting that a bicycle would want to swap ends with the application of the rear brake only.

    I'll be happy to remove my front brake and demonstrate. 10 speed, mountain bike, old cruiser with the Bendix brake in back. Sliding the rear end around is trivial, and 45 years ago I intentionally did it dozens and dozens of times.

    I can still stop at a stop sign and not move (much :shades: ), without putting my foot down.

    I also think shifting 21+ gears is a bit excessive.
  • ruking1ruking1 Member Posts: 19,826
    edited August 2011
    I have never seen a comparison. But for example, a (VW) DSG vs a 6 speed manual is a + 1,100 option. What is are typical $'s for CVT over a 6 speed manual?
  • shiposhipo Member Posts: 9,148
    edited August 2011
    In the case of the Nissan Sentra the premium for a CVT over a 6-Speed manual is just shy of $1,200. With that in mind, I can't for the life of me understand why someone would order the CVT. :confuse:
  • andres3andres3 Member Posts: 13,925
    With that in mind, I can't for the life of me understand why someone would order the CVT.

    I can only think of 3 reasons:

    1) They don't know how to use a stick shift or 3rd pedal.
    2) They want the convenience and ease of use of an automatic (is their a regular auto option to CVT?)
    3) The CVT may possibly get an extra mile or two per gallon depending on the 6-speeds gearing ratios.
    '18 Porsche Macan Turbo, '16 Audi TTS, Wife's '19 VW Tiguan SEL 4-Motion
  • shiposhipo Member Posts: 9,148
    edited August 2011
    Playing Devil's advocate here (I love doing that): :)

    1) If they can't drive a stick yet, then there's a $1,200 incentive to learn.
    2) I've driven Nissan rentals with a CVT, and while it is a good automatic, maybe one of the better automatics actually, it still "shifts" at inconvenient times and is just plain weird.
    3) While I've seen any number of automatic transmissions beat their manual brethren in the EPA tests, I've yet to see or hear about even a single case where the Automatic bests the Manual in the real world. That may happen sooner or later, but I don't believe we're there yet. :shades:
  • bobw3bobw3 Member Posts: 2,989
    "I've yet to see or hear about even a single case where the Automatic bests the Manual in the real world. That may happen sooner or later, but I don't believe we're there yet."

    How about a Prius ;)

    Pretty soon all vehilces will be some form of hybrid with CVTs.
  • xwesxxwesx Member Posts: 17,678
    edited August 2011
    That's hard to say, because the Prius doesn't come with a Manual. I hear the Honda Insight did... is that right? Apparently that is no longer the case (CVT only).
    2018 Subaru Crosstrek, 2014 Audi Q7 TDI, 2013 Subaru Forester, 2013 Ford F250 Lariat D, 1976 Ford F250, 1969 Chevrolet C20, 1969 Ford Econoline 100
  • shiposhipo Member Posts: 9,148
    Can't say I've ever heard of a Prius with a stick shift.
  • wwestwwest Member Posts: 10,706
    "..I don't believe we're there yet..."

    With the advent of the widespread use of FULL fuel cut, accompanied by automatic downshifts, appropriate downshifts(***), during speed coastdown periods the automatic's FE exceeds the manual quite handily.

    Initially used as early as 2000.

    *** final upshift as you, if you, approach a low enough roadspeed that the engine would otherwise stall.
  • wwestwwest Member Posts: 10,706
    Doesn't "slaloming" a car involve wagging the tail via simultaneous rear braking AND stearing quickly left or right...??

    And if you began rear braking while holding the stearing wheel neutral..?
  • wwestwwest Member Posts: 10,706
    For the moment CVT's are not ROBUST enough to handle more than 200HP, inexpensive ones anyway.
  • ruking1ruking1 Member Posts: 19,826
    For the same reasoning (better and controlled efficiency) the VW diesel record was set using the 6 speed manual.
  • wwestwwest Member Posts: 10,706
    Absent some method of "signaling" the driver that a downshift is needed, and the driver RELIGIOUSLY following, obeying, that signal, the FULL fuel cut technique cannot be used with a manual transmission.

    Or a method to restart the engine when throttle is re-applied.
  • andres3andres3 Member Posts: 13,925
    I know a guy that might have the technical ability and shop resources to convert a Prius to a 6 speed manual for you, for the right price! :P ;)
    '18 Porsche Macan Turbo, '16 Audi TTS, Wife's '19 VW Tiguan SEL 4-Motion
  • shiposhipo Member Posts: 9,148
    "With the advent of the widespread use of FULL fuel cut, accompanied by automatic downshifts, appropriate downshifts(***), during speed coastdown periods the automatic's FE exceeds the manual quite handily."

    Is that so; name me one car (just one) which is offered with both a manual transmission and any flavor of automatic where the real-world reports from drivers shows the automatic exceeding that of the manual.

    FWIW, your "FULL fuel cut" argument is yet another one of your red herrings; drive any modern car with a stick and a ScanGauge and you'll see indications that the fuel flow to the engine is in fact fully cut.
  • shiposhipo Member Posts: 9,148
    "And if you began rear braking while holding the stearing wheel neutral..?"

    The car would still enter a spin 99 times out of 100. Fact of life, deal with it and move on.
  • ruking1ruking1 Member Posts: 19,826
    edited August 2011
    The signaling is quite simple (seamless to the driver), let up on the accelerator pedal, there is zero fuel draw. Again it is simple to verfiy. VW has the VAGCOM computer program on a laptop that can be plugged in by cable and the engine can be monitored while in operation and transit. This works on either DSG or 6 speed transmission.
  • bobw3bobw3 Member Posts: 2,989
    Having the gas stop flowing when letting up on the gas pedal when a car is in motion is one thing, but that's not the same as the gas not flowing at a red light. If your VW is ideling at a red light, then fuel is being used. With stop/start technology, there is zero fuel being used at a red light.

    The beauty with a CVT is that the computer can find and maintain the most optimal ratio between engine rpm and wheels augmented by the battery in hybrids. If you had a manual transmission on a hybrid it would be less efficient because the driver wouldn't be aware of when to shift because it would depend on if the battery was providing assistance to the engine, or if the engine was also being used to charge the battery in addition to moving the car along. Hence the use of the CVT. And show me a manual that can average 50mpg in mixed use driving and I'll buy one.
  • ruking1ruking1 Member Posts: 19,826
    edited August 2011
    Absolutely. I have gleaned in passing that is .2 gal per hour. However diesels (Euroean market) are being equipped with stop/start technology. So by no means is it a CVT ONLY technology. We just happen to be normally at the bottom of the food chain. Probably more importantly, it is our (NATIONAL)policy to burn more when we can burn less. It is easy to observe that we keep out most to all of the European cars that get GOOD fuel mileage.

    I get 50 mpg in mixed driving with smaller injectors (larger was standard in European models) and a 5 speed manual (6 speed manual was standard, both together have the capacity of 2 mpg more aka 52 mpg). It has been on the market since 2003.So I have actually DONE (for 167,000 miles) what you threaten to do. So yours is an empty threat. 50 mpg is the norm in Europe (again I have read in passing 47 mpg is the current standard) so that is also nothing new.
  • shiposhipo Member Posts: 9,148
    "The beauty with a CVT is that the computer can find and maintain the most optimal ratio between engine rpm and wheels augmented by the battery in hybrids."

    A very common statement made by the CVT crowd. The fallacy with that statement is that given the broad power and torque curves of today's engines, the difference between pushing a car along at say 65 at say 2,200 RPMs versus say 2,500 RPMs is virtually immeasurable (all else being equal). Said another way, there really is no "perfect" rpm for any given power output; there is however an optimal range.
  • ruking1ruking1 Member Posts: 19,826
    edited August 2011
    For such advocacy, I have also not seen the EPA numbers.

    VW Jetta/2012 Passat has essentially the same EPA numbers for DSG/6 speed manual. In the past, most to all cars normally posted less mpg for automatics.

    Another issue one can chose a car that is MINUS-1,100 cheaper. If a CVT is mandatory or more pc the only choice, then structually one is paying a minimum of PLUS+ 1,1000 MORE. That can be a pretty high percentage more.
  • shiposhipo Member Posts: 9,148
    "VW Jetta/2012 Passat has essentially the same EPA numbers for DSG/6 speed manual."

    Agreed, the issue here is that when one reviews anecdotal reports from folks out in the real world, I consistently see higher MPG claims from the folks with three pedals under the dash (regardless of whether the Automatic variant is equipped with a DSG, Slushbox, or CVT).

    Long story short, I've read numerous allegations suggesting the EPA testing is biased in favor of Gasoline fueled cars with Automatic transmissions. Change the mix by opting for a Diesel and/or a Manual transmission, and the EPA tests seemingly drift further and further from reality. While the allegations and the anecdotal reports are proof of nothing, they do present some compelling areas for further examination regarding the accuracy of the EPA testing models vis-à-vis Diesel and/or Manual transmission equipped vehicles.
  • bobw3bobw3 Member Posts: 2,989
    It's a waste of time comparing what's in Europe or in Asia to what we have in the USA. It's apples to oranges. MPG is calculated differently in different countries. The tests are run differently. Emission and safety standards are also different. Fuel is even priced differently (aka diesel cost more in the USA vs RUG). And I realize that stop/start technology doesn't require a CVG, but the high MPG hybrids all seem to have one.

    You said, "So yours is an empty threat" What threat?
  • ruking1ruking1 Member Posts: 19,826
    From a certain to a very large extent, it has always been comparisons between apples to oranges. Just as long as we make it clear or attempt to level the playing fields that is about all we can do.
  • ruking1ruking1 Member Posts: 19,826
    You made the threat, not me. I am just walking the walk, before I talk the talk.
  • bobw3bobw3 Member Posts: 2,989
    edited August 2011
    You said, "the difference between pushing a car along at say 65 at say 2,200 RPMs versus say 2,500 RPMs is virtually immeasurable "

    So when is it "measurable" The fact that they're going with 6spd transmissions indicates to me that finding the optimal ration IS important.

    And you forgot to mention the battery aspect in hybrids. With a manual transmission, you may downshift to 5th to get more power, while the hybrid may provide the boost with the battery and slightly adjust the CVT ratio.

    The fact of the matter is that a computer with CVT and hybrid technology will surpass the average driver with a six speed manual transmission doing his best to guess when he should shift gears.

    And BTW if you're using diesel, you're paying more at the pump than RUG, which equates to a higher cost per mile.

    And while there may be SOME folks out there really good at getting the maximum efficiency out of a manual 6spd, the aveage American driver won't.

    And since the only diesel out there is the VW TDI, even if it did someone AVERAGE 50mpg with someone maximizing shift points and probably doing most of their driving on the highway, the reliability of VWs based on CR, JD Powers, mechanics, etc., all indicate that VW is a brand to stay away from. Yeah the engine may last a long time, but you'll really rack up repair costs on the other components. (with the exception of one poster who will remain nameless :P ).

    All that being said, if I lived in Europe, I'd probably be driving a 6spd manual diesel like several folks I know who live there, but not in the USA.
  • steverstever Guest Posts: 52,454
    edited August 2011
    Thanks for sticking to shifting and putting the personal jabs in neutral.
  • robr2robr2 Member Posts: 8,805
    3) While I've seen any number of automatic transmissions beat their manual brethren in the EPA tests, I've yet to see or hear about even a single case where the Automatic bests the Manual in the real world. That may happen sooner or later, but I don't believe we're there yet.

    Unfortuantely since the same driver isn't driving the same vehicle under the same conditions, one must toss that out as being anectdotle. The EPA results are the only ones that matter because they are done under controlled conditions.
  • ruking1ruking1 Member Posts: 19,826
    edited August 2011
    That was why I said what I said in the prior post on the EPA mpg topic. In truth, my own experiences are closer to what Shipo describes. The 5/6 speed manuals have much more RANGE driving under the same to similar circumstances than the DSG's.

    CVT advocates dont even seem to go there (in the comparison) with whatever else is being offered in that same model and year. In other words the data is being cooked.
  • ruking1ruking1 Member Posts: 19,826
    edited August 2011
    ..."All that being said, if I lived in Europe, I'd probably be driving a 6spd manual diesel like several folks I know who live there, but not in the USA. "...

    The only difference is I am and have been doing EXACTLY that in the US. So defacto, you buy into (figuratively and literally) the burning more is better policy.
  • bobw3bobw3 Member Posts: 2,989
    Don't you think that Toyota want's their Prius to get the highest MPG ratings possible? So if they could put in a 6spd manual or automatic transmission and get better overall MPG, don't you think they'd do so? If not, why.

    With VW it's a different story. Part of the sales package with VW is "driver experience." Even if a CVT would give the TDI slightly better MPG over an automatic or even a 6 spd manual, VW probably would not want to use it because it might affect their "image" as a "driver's car." Toyota doesn't care if people think that the Prius is an "appliance" car...just that it gets high MPG.
  • bobw3bobw3 Member Posts: 2,989
    "The only difference is I am and have been doing EXACTLY that in the US. So defacto, you buy into (figuratively and literally) the burning more is better policy. "

    I'm not sure how you figure that when the average Prius owner spends less on gas per mile than the average TDI owner. The average TDI driver will get around 40 mpg with the average Prius owner getting around 50 MPG, and that's using the cheaper RUG vs diesel fuel.

    Again, one single personal experience isn't the average.
  • qbrozenqbrozen Member Posts: 33,733
    Well, I'm going to go out on a limb here and say that any one driver who is TRYING to maximize mileage (which the EPA doesn't do) would do better in the manual equipped car.

    I've TRIED to maximize mileage in a number of automatic equipped cars and just can't do it because the car WON'T LET ME. So whereas I can ALWAYS exceed EPA in a manny vehicle, I have NEVER done so in an auto vehicle, despite my best efforts.

    '11 GMC Sierra 1500; '98 Alfa 156 2.0TS; '08 Maser QP; '67 Coronet R/T; '13 Fiat 500c; '20 S90 T6; '22 MB Sprinter 2500 4x4 diesel; '97 Suzuki R Wagon; '96 Opel Astra; '11 Mini Cooper S

  • shiposhipo Member Posts: 9,148
    "And BTW if you're using diesel, you're paying more at the pump than RUG, which equates to a higher cost per mile."

    Do you really believe that?

    Just because a gallon of gasoline typically costs less than a gallon of diesel in no way makes the cost per mile of the diesel higher. The fact is that there is significantly more energy in that gallon of diesel than that same gallon of gasoline; that and diesels run on the lean side of stoichiometric (often signifantly so) whereas gasoline fired engines spend 95% of their operational life on the rich side of stoichiometric. Long story short, even CVT equipped Hybrids are extremely challenged to match the cost per mile of a relatively simple manual transmission/diesel equipped vehicle of a similar size and capability.
  • ruking1ruking1 Member Posts: 19,826
    edited August 2011
    The only real nexus between a Prius and a Jetta are the MPG ratings. (Media thing) Again the Toyota Prius costs way more.

    The truth is more like the competitor for the Jetta/Passat are the Camry Hybrid. As such Camry Hybrid gets worse mpg, costs 1000's more. I would dare say it is probably less fun to drive.

    So for example a diesel/5/6 speed manual Corolla, Civic (more like the Prius) can easily get 52 to 56 mpg. This of course is better mpg than the pedestalled Prius. It would be at way less cost also. I am sure you would agree that Toyota would be cutting its own throat by brining in these ULTRA efficient (from an US market point of view) Corolla's. Why would anyone want to pay more for a Prius if they can pay (MUCH) less for a diesel Corolla ???? In fact a gasser Corolla outsells the Prius by a lot and for a long time !!??
  • bobw3bobw3 Member Posts: 2,989
    A Jetta TDI cost about the same as a Prius.

    Getting 45MPG paying with diesel is NOT the same as getting 45mpg on RUG.

    Simple math above. ;)
  • shiposhipo Member Posts: 9,148
    "Don't you think that Toyota want's their Prius to get the highest MPG ratings possible? So if they could put in a 6spd manual or automatic transmission and get better overall MPG, don't you think they'd do so? If not, why."

    Not at all practical; trying to marry a hybrid drive train with a manual transmission is pretty much a worthless exercise. Honda tried it and it was a complete failure.

    FWIW, I concede the point when it comes to "appliance" CVT and hybrid propelled cars in that I think the CVT is the perfect transmission for that type of vehicle. Then again, who really cares; certainly not someone looking for at least a little bit of driving pleasure.
  • ruking1ruking1 Member Posts: 19,826
    edited August 2011
    Well in a manner of speaking yes. When I bought the 2003 Jetta TDI, I seriously considered both the 2003/2004 Prius'es. The Prius'es were @ a 38% premium ($7,000 more). There also was a 6 mo wait (at that time in 2003). So if you think that 38% is ball park, then I would agree with you.
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