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#16
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Re: What is that manual button on the auto stick
The TCC lockup clutch does not have any effect on the ratios of the ranges provided by the two planetaries. Due to the nature of the torque converter , it allows for torque multiplication and a speed difference between impeller and turbine, so no mechanical clutch is required between engine and transmission. The torque converter will lock and unlock based on a calculation that accounts for gear position and cruise status among other factors that can and has been expressed graphically by members with the understanding and tools to do so. The purpose of this clutch is to allow the entire torque converter to direct couple the impeller and turbine so there is essentially a direct drive just like in a manual transmission for purposes of economy and fluid heat reduction. Early autos did not have a locking converter.
The manual switch and it's purpose is explained quite well in the owners manual where it shows what gears will be available when the stick is in various positions. Manual 1 will hold 1st gear until 6500 rpm, and also takes a more aggressive approach to transfer apply in that gear. Manual 2 starts in 2nd ratio but there is no slipping of the holding device in the transmission, everything operates normally, except 1st gear is not used, and again the transfer apply is more. Manual 3 allows for use of gears 2 and 3. Manual in D does not have any purpose or effect if I recall correctly. As for the transmission filter, it was added by Subaru to catch the particles which, coincidentally, were from the deterioration of the clutch friction material on the TC clutch. This was not a real fix, but a field fix as it would be costly to perform the correct repair which was to replace the converter with an updated part and to remove the heat dissipating screen from the cooler tube in the radiator. This repair was one of the first updates to the transmission system and cars produced with these new parts did not have the in line filter as it is not necessary. Similarly, If your transmission has been replaced with one from Subaru your converter will be new and will not deteriorate, and no filter is needed. I would also reccomend radiator replacement if the car has the old style with the screen in it. It is a common misconception that this screen inside the radiator is a filter, which I have attempted to eradicate from the minds of our fine members. It is my opinion that you should not add an external filter because of the possible restriction it could cause and the very severe damage it can cause to the transmission "hard" parts. Many have been running them for several years without issue, but again, it is not necessary unless you still have the original converter and radiator. As for an external cooler, you need to be sure to select one that has very little restriction, or you can skip the selection process and use the one that I am using under the thread "the ultimate transmission cooler". It is a high flow unit that eliminates the need for any other component in the cooler circuit including an external filter and the original restrictive radiator cooler.
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2007 GS 450h-Active Stabilizer/Radar cruise 1994 L Blue 3.70 VTD ASE Master Automobile ASE Advanced Level Specialist Toyota Master Diagnostic Technician (former life) Last edited by NiftySVX; 08-17-2009 at 09:47 PM. Reason: addition |
#17
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Re: What is that manual button on the auto stick
quick question on tcc lockup does it occur in any other selection besides D, thanks .....G
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I thimk ther4 I an, what? huh! 03 Baja. 05 Baja turbo 92legacywagon"snow" 94legacywagon"whinny" 84Brat"huey" 92svx"samantha".pearl 92svx"sabastian"4.44 silver 92svx"sabrina".ebony 05legacy gt limited "Moon" blue. 06 Subaru legacy gt limited. |
#18
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Re: What is that manual button on the auto stick
No it does not.
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#19
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Re: What is that manual button on the auto stick
Torque converter lockup will occur in any gear range/stick selection except first speed of any stick selection if the transmission is in overtemp mode. Long ago we had a debate about wether or not it would lock in any gear other than 4th and I am glad to say that all these years later I told you guys it would! haha.
Other than in overtemp, it will only lock in 4th range.
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2007 GS 450h-Active Stabilizer/Radar cruise 1994 L Blue 3.70 VTD ASE Master Automobile ASE Advanced Level Specialist Toyota Master Diagnostic Technician (former life) |
#20
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Re: What is that manual button on the auto stick
Quote:
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#21
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Re: What is that manual button on the auto stick
Meah just admit someone else is right
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1994 SVX L - FWD Barcelona Red 190K miles ~ SOLD 1994 SVX LS - 5spd AWD Emerald Green 202k miles PWR Radiator, HID 5000k, New paint job with issues, 17" STI BBS wheels, converted to 5spd AWD from FWD. Purchased from SVXyGirl 2/20/09 -- Undergoing complete rebuild 1993 Justy 4wd 5door- Teal of sorts , beater. 2008 OBXT Newport Pearl 65k miles |
#22
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Re: What is that manual button on the auto stick
Ok I admit it..... ONLY my car locks up the TC exclusively in 4th, as apparently my transmission is the only one on the network not perilously overheating
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#23
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Re: What is that manual button on the auto stick
No, your transmission is probably overheating, just probably not to the outrageous 230+ degree pan temp that the original TCU will see as overheating. Get one of the ecu tune TCUs and it gets more realistic at 212, which is a safe threshold assuming your fluid has heated evenly and you don't have a specific hot spot that is boiling it
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2007 GS 450h-Active Stabilizer/Radar cruise 1994 L Blue 3.70 VTD ASE Master Automobile ASE Advanced Level Specialist Toyota Master Diagnostic Technician (former life) |
#24
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Re: What is that manual button on the auto stick
Yeah but your headgaskets are leaking like a sieve and your airbox has a rat in it.....
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Chris "A person convinced against their will, is of the same opinion still" New?? Find the downloadable SVX Online Service Manual Here RECOMMENDED READING for newer SVX owners Here some cool info if not fully accurate. Last edited by SoCal LS-L; 08-19-2009 at 12:00 PM. |
#25
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Re: What is that manual button on the auto stick
Just in case there is any confusion, below is an accurate description of what the Manual Button does. It has no effect on TC lockup and it does not do anything when cruise control is set. The transmission has a separate set of shift maps for cruise control.
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Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II |
#26
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Re: What is that manual button on the auto stick
if it keeps you in the gear you have selected on the shifter then why do you need to have it? it should stay in that gear that the shifter selected.
I see it as pointless. If my car had NOS it would be my activation switch though. then I would need a light that says "danger to manifold"
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Matt 15 OBW premium w/eyesight A picture of an SVX in the garage |
#27
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Re: What is that manual button on the auto stick
Wow thanks for the tcc lockup answers, I think I started a bit of a firestorm there for awhile! My tranny is not that hot, I was just curious...........G
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I thimk ther4 I an, what? huh! 03 Baja. 05 Baja turbo 92legacywagon"snow" 94legacywagon"whinny" 84Brat"huey" 92svx"samantha".pearl 92svx"sabastian"4.44 silver 92svx"sabrina".ebony 05legacy gt limited "Moon" blue. 06 Subaru legacy gt limited. |
#28
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Re: What is that manual button on the auto stick
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Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II |
#29
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Re: What is that manual button on the auto stick
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controlled transmission that was installed in many 1987.5-98 Subaru vehicles. It is not a three speed transmission with overdrive. It features a lock-up torque converter, which locks up in all forward gears except 1st......., I guess the key words there are "many 1987.5-98 Subaru vehicles"..........party on people.............G
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I thimk ther4 I an, what? huh! 03 Baja. 05 Baja turbo 92legacywagon"snow" 94legacywagon"whinny" 84Brat"huey" 92svx"samantha".pearl 92svx"sabastian"4.44 silver 92svx"sabrina".ebony 05legacy gt limited "Moon" blue. 06 Subaru legacy gt limited. |
#30
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Re: What is that manual button on the auto stick
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Matt, you already know this; manual is installed primarily as a way to get the svx to move in mucky/slippy conditions by using a higher gear to give good grunt at low-ish revs so the car does not have enough revs to defeat poor traction. That's a mouthful, but, there, I've said it. There is one other very good use for Manual shift map; when tuning on a rolling road, put your car in two range and switch on Manual. It will ignore 1 range and rev from nothing up to maximum permitted revs, before shifting to three range. Your tuning shop will thank you very much. Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
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