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Comments
Something like that.
Steve Mitchell
I copied and pasted the image URL
highlighted and clicked the Img button
This but the image formula at the beginning and end
checked spelling
checked preview but no picture
What am I doing wrong?
(Please make sure the picture is of reasonable size. Very large pictures skew the page and have to be removed.)
Downshifting to help reduce speed while in S, is totally fine. In fact, the car does this routinely while in D, for example when you apply the brakes going down a steep hill. While in D, you can verify when automatic downshifts happen by listening to the engine, watching the RPM, or by switching from D to S (you can tell if the gear in use is 4 or a lower gear than 4).
havalongavalon
Remember the law of conservation of energy from physics.
When you use your brakes to reduce vehicle speed, energy of momentum is converted to heat energy by wearing away some of the frictional surface of the brake pads.
When you downshift the transmission to reduce speed, some of the momentum is likewise converted to heat by wearing away some of the friction elements (brakes, bands, and clutch discs) within the transmission. Once the downshift is complete, most of the momentum is converted to heat by frictional pumping losses in the engine bearings and piston rings ("engine braking").
Granted, for a similar event, the overall wear to the transmission friction elements is much less than the brake pad wear. However, the brake friction elements (pads) cost $200 (for all 4 wheels) to replace, versus perhaps $2000 to replace the friction elements in the transmission.
It's your choice.
This is a jpg photo and only 85 kb. If this won't work, I give up
Bingo it works Thanks Pat
Try doing this. First go to the Picture page and highlight the web address corresponding with the Pic. Then Right Click and choose "Copy". Then come here on the Avalon Forum ( or wherever u want to post). Then, click on the Img
bar at the bottom. Then right next to it RIGHT CLICK your mouse and highlight "Paste". After that click on Img again. Trust me it works
In theory you are correct, but in practice the Avalon is designed to routinely use "engine braking" while in D. To downshift (with moderation) while in S only reproduces normal loads that the transmission is designed to withstand. If the transmission were to wear prematurely with this type of normal use, this would have to be covered by the warranty or extended warranty.
Moderate downshifting to help slow down the car should be cheaper than more frequent replacement of worn brake elements (think rotors as well as pads).
Regarding coasting in neutral, this can improve gas mileage in hilly territory. I raised this issue and we had some discussion 5-6 months ago. I believe mackabee made the point that driving in neural could indeed cause damage to the transmission, besides being potentially unsafe in emergencies.
havalongavalon
Kind of the opposite concept to "cruise control". A little bit closer to "U control".
havalongavalon
http://groups.msn.com/ToyotaAvalon/regis2006avalon.msnw?action=ShowPhoto&PhotoID=45
http://groups.msn.com/ToyotaAvalon/regis2006avalon.msnw?action=ShowPhoto&PhotoID=41
Hi regis,
I went to your website, Copied your image, then in this Reply I clicked "Img" THEN MOVED THE CURSOR TO THE RIGHT, Pasted the image and clicked "Img" again.
Nice GPS unit!
havalongavalon
VSC, while it can be a very valuable safety feature in emergency situations, dials in a little too early for my taste on almost all cars so equipped - esp. during spirited driving. I have a 2005 so VSC was not even available, but don't think I would opt for the VSC even if I could. Maybe I'm just old fashioned, but I don't like computers etc. driving for me.
I agree there is some engine braking in 5th (top) gear; but don't think it's good idea to force downshifts instead of using your service brake. It's been 40 years since I graduated from automatic transmission school, so perhaps I'm a bit rusty (or is it just the onset of senility?).
We need to differentiate between A/T gear changes made under load, versus no load. Just as applying your park brake while stopped does not wear any friction material, A/T (and M/T) clutching and declutching of unloaded shafts, or shafts rotating at the same rate, introduces little or no wear.
In the U151E Avalon A/T, there are only 2 conditions where engine braking occurs. Cruising in 5th (top) gear, both direct clutches are applied, and remain so even during light deceleration, locking the input and output shafts together through the overdrive gear ratio. Identical to an M/T car, there is some minimal engine braking when you "let up" on the accelerator. Once you slow to the point where the transmission drops into any other (1,2,3,or 4) gear, an overrunning clutch effectively decouples the engine from the drive shafts, so no engine braking occurs. The transmission is now “freewheeling” (similar to coasting). The same scenario is true for speeds 2,3, and 4 when you force a manual downshift while decelerating. As long as you are decelerating, all downshifts are made with no load, and there is no engine braking. Until you accelerate, there should be no perception of being in a lower gear. This is why the downhill scenario Havalong described works.
The second case is 1st gear. In “D”, there is no engine braking. Quoting from the Toyota transmission training manual, section 5:
“In D, the one-way clutch holds the carrier, so while decelerating no engine braking will occur.”
In S (manual) mode, however, selecting first gear engages the 1st/reverse brake, B2 (sometimes called a “band” by A/T mechanics), allowing the front wheels to drive the transmission input shaft through the gear reduction. It is the B2 friction surface that will be worn by this maneuver.
To replace the B2 friction material (B2 is actually a clutch instead of a band in the Avalon), the transmission must be removed from the car and disassembled, typically under conditions reminiscent of an operating room. Unfortunately, brake B2 is not designed for “heavy duty”. Other than S1, it is only used during Reverse.
I would hate to have to rip apart an A/T with 50K miles just to replace the B2 clutch pack. This is a job for the pros . . the clutch pack alone probably costs several hundred US$$. I can replace a set of brake pads in a hour or less in my garage at a cost of US$40-US$60.
I realize it can be a lot more fun to downshift. For many, it's worth the gamble.
Yes, VSC is THAT important - safety is everything, and spending close to $30K for a car without it would be ridiculous. Yes, Touring rides a little more harsh, but it handles better - ie. safer and is more apt to avoid an accident than an XLS. I own an XLS w/VSC only because I bought an 05 in April this year and Touring was unavailable w/VSC at the time. Yes I'm pis%$#ed at Toyota for not telling me in April when I asked whether or not 06 Tourings would have VSC (yes they had to have known at the time).
Handling is an extremely important trait to me, but VSC won out over handling because it helps to AVOID an accident far better than the Touring's better handling suspension can do alone. Now that you have a chance to have both in the 06 Touring, just be patient and one will come along. Get on the phone - a day trip to a dealer perhaps 100-200 miles away is worth it.
Regards,
Deanie
Also, the tranny has a lot of slip built into it so there is no undue wear from being in drive at a stoplight for the same reasons as above (car manufacturers know we'll encounter stoplights routinely and have been designing auto trannys to cope with this without noticeable wear). It's also unsafe to be coasting out of gear if you should need to "floor it" to avoid an accident.
Regards,
Deanie
P.S. Sorry about your image posting problem. Send an email to the host. Pat is very helpful regarding these matters. Keep us posted about your ownership experience.
MotownUSA, aftermarket auto Nav units vary somewhat depending on the model. If you search the internet I think you can find e-tailers selling the one Regis has for around $600 US. I think I saw it in Circuit City's ad within the past couple of weeks for $699. Post 9019 covers some of my observations/thoughts about the factory one in our Avalon and the aftermarket one I use in our other vehicle.
I see www.gpscity.com has the Garmin c330 on for $551.95 US I paid $689 Cdn at Best Buy in TO, The had it listed for $899 Cdn but the Canadian arm of gpscity.com has it listed for the lower price so they very reluctantly price matched it.
motownusa, the reasons why I bypassed the factory Nav for a portables GPS are:
of course the main reason was $3,550 Cdn. for the factory nav versus $689 Cdn for the portable unit
I read all the problems some post here about the factory nav but I suspect the main problem is learning how to use it. And it's very hard to learn when the unit is permanently in the car. It took me two days of practise at home with my portable GPS to learn all the amazing things it can do.
Since it's portable, I can use it in a second vehicle
my Garmin c330 has an internal 5 hour battery so I was able to install it without the ugly cables most other portable must use. The only time I use my dash mount is when I'm on an extended trip which is not often. See my post # 9244 to access photos of my installation (I still can't post photos directly in spite of lots of help from this forum)
Let me see if this works:
Edit: Okay, it does not. I got the direct URL of the picture and we still get a broken link. Maybe it's something up with MSN? There are many other places that host photos, maybe you want to try another host?
Anyone else have suggestions on this? Someone earlier was able to make this work from that specific MSN page, I think?
OK. Thanks havalongavalon. I did exactly as you did. So did Pat but we both failed where you succeeded. Wonder why? Anyway, Pat thought it may be something to to with MSN photo. Does anyone have suggestions for a more reliable photo hosting site?
First of all, VSC systems will have the greatest impact YOUR ability to get the car into (and out of) trouble - like getting into a corner too deep, the system will cut throttle and/or apply braking because 'it' has decided that you don't know what you are doing and has assigned sometimes artificially low cornering limits on your car. Reference that $30k sedan comparo in C&D and the downrated handling on the 300 Touring simply because it has a 'hyperinterventionist' (their term) stability control system on a car that dynamically (because it is RWD) should outhandle the Av Touring. The automotive press will generally test and evaluate the handing of cars with VSC systems shut off (if they can) and have some disdain for 'electronic nannies'. Consumer magazines love them, of course. The point is that VSC can hinder your ability to avoid accidents simply because it is shutting down or modifying those systems you may need to use, at some level lower than the car's actual capabilities. Using these capabilties, of course, assumes a high level of driver competence. That said, VSC is most valuable and useful specifically in bad road conditions, given that it will generally sense loss of traction etc. before the driver can - just like ABS will 'pump' brakes more efficiently than the driver - dramatically shortening stopping distances.
Second, I would submit to you that the vast majority of accidents out there are not driver avoidable because of the safety systems that his car may or may not have. There is nothing VSC (or anything else) is going to do about that idiot running the red light - or that guy losing control in front of you and you have no place to go. It can certainly keep you from 'doing yourself in' but at a price.
Here is a thought. In my message # 9280 I copied and pasted regis' website image using a Mac computer. I tried to do this again now using a PC and l couldn't. Macs have superior graphics capabilities, but I don't understand why it should matter for this application.
Maybe someone else using a Mac could try to copy & paste regis' image into a message, to confirm or reject this theory?
havalongavalon
Pat, it appears that images can only be posted on this forum with a Mac. Too bad since visual sharing is a great way to communicate ideas. I've tried several options including changing browsers, photo fosters etc. but no luck. Anyway, thanks for trying.
Regis