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#1
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tranny problem/no tcu code
i'm afraid my transmission is on its way out shifting into and out of second gear is happening WAY too late, and it feels like the clutch is working WAY too hard in that vicinity. no flare, just a late shift. i'm not getting anything from the TCU except the old code from when i unplugged the resistor to see if that helped (as expected, the shift firmed up, but it still came late - somewhere around 3500-4000 rpm under tame city acceleration). My ATF level is fine and the fluid is clean, but the diff fluid is thick, opaque brown and sludgy. (This could be how it's supposed to be, never dealt with diff fluid before, but i doubt it) I'll be draining and changing that later today.
It seems like 2nd is usually one of the first gears to go when our trannies are dying so am I likely looking at a rebuild? My mechanic reccomended a tranny guy - I'm gonna take it by his shop hopefully tomorrow and he's gonna look it over, but if there's a miracle cure for this (riiiiiiiight ), someone please tell me lol
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Kevin Crutchfield Neophyte SVXer 92 LS-L Ebony/Lqd. Silver, stock, 88xxx miles, flung into a telephone pole by a drunk a month after buying 92 LS-L midnight black 141xxx miles, WRX FPR, MAF bypass, lightened underdrive pulley, formerly AppstateSVX's |
#2
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The first thing you should do is adjust your T.P.S.(throttle position sensor) to 0.50 volts with the key on, and everything else off.
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#3
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Diff gear oil is yellow and thick when new; change yours now. Adjust your bands as well (do a search for band adjustment).
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Cars I've worked on: '05 Subaru Impreza STi, '02 Subaru Impreza WRX Wagon, '01 Toyota Celica GT, '98 Subaru Legacy GT 2.5 Sedan, '96 Isuzu Rodeo, '95 Jeep Cherokee 2WD, '94 Plymouth Sundance, '94 Subaru SVX LSi, '93 Subaru Impreza, '92 Subaru SVX LS-L, 2003 Subaru Baja. |
#4
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Hi, I've got a 92 that is doing the same thing, but also will hunt up and down at steady speed and now sometimes it will start in third gear even if the manual button is pushed and stick is in low. fluid looks good and when acting normal - shifts nice. any suggestions ???? thanks
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#5
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Starting in 3rd is indication of a malfunctioning (or missing) TCU.
Hunting at a steady speed is usually a bad/dirty signal from the TPS (Throttle Position Sensor)
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David B. SVXipedia @ SVX-IW.COM -- SVX Information Warehouse 2.0 coming...eventually! Ebony 1992 SVX LS-L 5 spd Koni/GC Stebro 187k miles RIP (Rust In Pieces) 1993 SVX 5 spd Koni/GC Stebro Polyurethane bushings still available! |
#6
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If the trans is shifting at a higher speed than it should, it is because either, the TCU is seeing the throttle being open wider, than it is. Or it is seeing the road speed as being slower, than it is. If it was seeing a slower signal from the speed sensor, it would be trying to lock up the Transfer clutch. If it saw both speed sensors as slow, the speedo would read slow also. The Throttle Position sensor would be giving a higher than normal, voltage reading, as Tom says. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#7
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 07-20-2006 at 07:07 PM. |
#8
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#9
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#10
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Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#11
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#12
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thanks all! i changed the diff fluid from the sulfury pits ... from the looks and consistency of it god only knows how long ago it was changed. i read over and looked at the pics of the TPS and Brake Band adjustments and they're honestly beyond my capabilities right now. so the tranny shop has the car, and i passed the information onto them. Trevor - are they likely to know how properly to check the TPS re: your post?
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Kevin Crutchfield Neophyte SVXer 92 LS-L Ebony/Lqd. Silver, stock, 88xxx miles, flung into a telephone pole by a drunk a month after buying 92 LS-L midnight black 141xxx miles, WRX FPR, MAF bypass, lightened underdrive pulley, formerly AppstateSVX's |
#13
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BTW, has anybody made the Office Space TPS Reports joke yet?
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Kevin Crutchfield Neophyte SVXer 92 LS-L Ebony/Lqd. Silver, stock, 88xxx miles, flung into a telephone pole by a drunk a month after buying 92 LS-L midnight black 141xxx miles, WRX FPR, MAF bypass, lightened underdrive pulley, formerly AppstateSVX's |
#14
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yeah, in case you didn't get that Memo......we're putting cover sheets on ALL of the TPS reports now...... Did the diff change fix the problem? I did change the diff fluid once.....guess I kind of forgot to change it again.......sorry
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1992 Midnight Black LS-L - Sold 3/3/06 1991 Toyota MR2 - Sold 11/27/07 1992 BMW 325i - Tokicko Suspension |
#15
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[QUOTE=
Trevor - are they likely to know how properly to check the TPS re: your post? [/QUOTE] I doubt that they would try. The rule is usually, if its faulty or even suspect, fit a new one and charge the customer. Less hassle and more profitable. What is more, within all trades these days, there are two defined levels of qualification. There are few considered as being at "component level", i.e. who know what is going on inside each black box and can repair the inner components. Check the ads covering employment where this term is often used. Sad but true and hence the advantages of in many instances, doing it yourself. Also check the how to section, for more detailed advice.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 07-23-2006 at 05:34 PM. |
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