What gear are you in ?

LarryIII · #1 12-20-2001, 08:18 AM

There is a discussion going on at the Yahoo SVX Club site.

The question is:
To insure tranny longevity, should an SVXer leave the tranny in 'D' and let it do the work or should one drive in 2, 3, or D depending on speed and conditions.

The floor is open - opinions wanted.

Larry III
PS: The technical service people seem to favor leaving it in 'D'.

1994SubaruSVX · #2 12-20-2001, 09:27 AM

i just put it in drive and go. i just cant see the benefits of manually shifting. to my knowledge auto trannies were just not made to operate like that.

cocacola08 · #3 12-20-2001, 09:49 AM

Quote:

Originally posted by 1994SubaruSVX
i just put it in drive and go. i just cant see the benefits of manually shifting. to my knowledge auto trannies were just not made to operate like that.

ditto

Aredubjay · #4 12-20-2001, 09:52 AM

The auto tranny was designed to "do the work." The TCU reads conditions and adjusts accordingly. I, personally drive in D and would only think that "forcing" the car to drive in a selected gear, would do more harm than good. I could be wrong, but, that's my opinion.

1994SubaruSVX · #5 12-20-2001, 01:18 PM

NERVOUS!!!

Seraph · #6 12-20-2001, 04:56 PM

IMHO, the 1,2,3 selectors are there for show and to make more money for SOA and FHI. The more you use the 1,2,3 with manual hold, the more you are going to put strain on the tranny. I might be wrong here but put it on D and press the brake when you do not want your car to move and press the gas when you want to go forward or backward.

lwin

Mr. Pockets · #7 12-20-2001, 04:56 PM

There was a theory a while back that driving in '3' in town would save the transmission from shifting to 4th. Fewer shifts means less heat, went the theory.

The only side effects I saw were:

1. Decreased mileage.
2. I frequently forgot to shift the car to 'D' when I got on the freeway.

oab_au · #8 12-20-2001, 04:59 PM

I don't agree with manually shifting the box, the computer does it better. BUT, I do most of my around town driving in 3rd gear.
In 3rd the planetary gear sets are locked together as a solid shaft for a 1:1 ratio, to give an overall ratio of 3.7 (or so). It is much more lively in traffic and fuel consumption is better, alternator charges better, lights are brighter.

The main reason is that, most of the transmission heat is produced in the torque converter, when it has to multiply torque. Which it has to do a lot of, when driving around town in D. The overall ratio in D is a very high 2.5:1. This causes the converter to do a lot of torque multiplication to reduce the overall ratio to a lower ratio, (the converter can go to a 2:1 reduction), producing a lot of heat in the process. As we all know heat is the transmission destroyer.

When I come to any conditions that is not high speed cruising, I go back to 3rd. Especially in the hilly country.

Make it easy on the transmission, and your wallet.

Harvey.

LarryIII · #9 12-20-2001, 05:04 PM

Quote:

Originally posted by Mr. Pockets
There was a theory a while back that driving in '3' in town would save the transmission from shifting to 4th. Fewer shifts means less heat, went the theory.

The only side effects I saw were:

1. Decreased mileage.
2. I frequently forgot to shift the car to 'D' when I got on the freeway.

Nick,

John Shotsky just proposed this theory on the Yahoo site.

Larry III

Mr. Pockets · #10 12-20-2001, 05:13 PM

Quote:

Originally posted by LarryIII

Nick,

John Shotsky just proposed this theory on the Yahoo site.

Larry III

Well, it's not a new one. And I think it's horse pucky. But then what do I know?

The only time I can see it being of any measurable benefit is if you HAPPEN to be in traffic that is not a constant speed, but at the right range where your car has to shift between 3rd and 4th a lot. In that case, you need to calm down and don't ride the bumper of the guy in front of you so you can keep a constant speed.

Beav · #11 12-20-2001, 09:36 PM

The part I find amazing is that this is an issue in the first place. Why would anyone want to.... oh, to heck with it....

Beav

SVXMAN2001 · #12 12-20-2001, 10:33 PM

the auto trannies on subaru's have 1,2,3 primarly for towing purposes and for inclimate weather. you have more torque in certain gears, and need better traction in snow. However I would say usingthe 1,2,3 gears should be used sparingly. In my opinion
chris

Beav · #13 12-20-2001, 11:06 PM

Ability to hold 1st gear: descending extremely steep grades and extended slow speeds, such as encountered in The Easter Parade. However, the SVX's small windows restrict the amount of waving done by its occupants unless they have a knack for duplicating the royal's 'wrist-twisting'.

Ability to hold 2nd gear: Descending not as steep grades and for more throttle/torque control on low-traction surfaces.

Ability to hold 3rd gear: Descsending light to moderate grades at higher speeds and to eliminate 'hunting' while driving at speeds that cause the transmission to shift back and forth between 3rd and 4th gears.

Selecting 3rd gear in traffic keeps trans from 'hunting' and usually keep torque convertor from 'locking up'. The main cause of the stock trans cooler plugging up is the clutch material from the torque convertor. The material degrades and 'flakes' then moves downstream to the most constricted area - the cooler. Selecting 3rd in traffic may help brake life and help reduce wear on torque convertor clutch.

Towing with the SVX: I'm getting a wonderful image of a hitch bolted through the bumper skin and towing a fourteen color, has-been U-Haul trailer.

Aside from the above, why would anyone one to manually shift an automatic? There shouldn't be any damage from it, afterall being in first is, well, being in first (or second, or third, etc.) But it does sound as though someone is desperately trying to figure a new way to abuse their car, doesn't it?

Beav

Beav · #14 12-20-2001, 11:16 PM

If one were to manually shift 100% of the time, portions of the valve body would have no purpose in life. Kind of a 'use it or lose it' syndrome. Soon after converting to manual shifting people will start new threads on how to overide their auto temp control, how to eliminate those nasty power windows and locks, remote mirrors, etc. Next thing you know their cars will be reduced to Pintos with fat tires and funky windows...

Beav

Aredubjay · #15 12-20-2001, 11:20 PM

Beav, I'm really beginning to enjoy your posts. It's kinda like the "ghost of eddycat" with all of the spit and none of the vinegar. I realize that's kind of a "backhanded compliment" but, it is meant as a compliment nonetheless.