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#46
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Re: A question for the Transmission experts
I think you're thinking of someone else. I don't recall having ever been involved in a debate before... I stayed out of the thread that discussed line pressure
I'm going to post up my snapshots from the picoscope as soon as I get a chance to capture them, but they look to be correct...
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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) |
#47
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Re: A question for the Transmission experts
Yes I was thinking of/meaning someone else. I was talking about Trevor and Harvey's history. I don't want to be involved in a debate either.
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#48
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Re: A question for the Transmission experts
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I have previously read in another thread, comments by Harvey regarding mercenary motives and attitude. While I had misgivings at the time, I am now in agreement with his assessment, as will all those intuitive.
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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$hit! |
#49
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Re: A question for the Transmission experts
I never asked you to aggree not to question what I would be posting. I asked you to aggree not to 1) beat the other up with anything I posted indicating he was wrong and 2) not harbor resentment about anything I might post that would indicate you are wrong.
If you were ready to do so you would have just said that instead of all this other double talk. I'm not posting the info. |
#50
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Re: A question for the Transmission experts
Well I snapped some pictures of the scope patterns today as I got bored. Definitely A change in the two from idle and wide open, which should be giving me a change in line pressure.
This first one is at just off idle, as soon as the pulse starts http://inlinethumb48.webshots.com/44...600x600Q85.jpg And here is at wide open throttle http://inlinethumb38.webshots.com/43...600x600Q85.jpg
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2007 GS 450h-Active Stabilizer/Radar cruise 1994 L Blue 3.70 VTD ASE Master Automobile ASE Advanced Level Specialist Toyota Master Diagnostic Technician (former life) |
#51
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Re: A question for the Transmission experts
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Bluff called, cards thrown in. How good was the hand?
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#52
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Re: A question for the Transmission experts
Okay, well thanks to everyone who contributed, the solenoid was in fact the culprit and its replacement fixed the problem.
I guess this wasn't all bad, I'm now an expert in line pressure control on a 4EAT.
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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) |
#53
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Re: A question for the Transmission experts
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Dare I say, "I told you so", as per my first PM.
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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$hit! |
#54
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Re: A question for the Transmission experts
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Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#55
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Re: A question for the Transmission experts
Joking aside, this has been a well researched, well conducted and informative thread of the highest order.
Thanks to all who contributed. This is what the Network is all about, helping to solve problems for members. Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#56
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Re: A question for the Transmission experts
Without controversy, it would have been as dull as dishwater.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#57
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Re: A question for the Transmission experts
I can always rely on you, Trevor.
__________________
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 |
#58
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Re: A question for the Transmission experts
Diligence in checking line pressure surely saved expensive consequences. Exactly what were the symptoms which encouraged you to carry out a pressure test? Your experience in this regard is of worthwhile interest and could save others from strife.
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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! |
#59
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Re: A question for the Transmission experts
Unfortunatly, pat has requested the solenoid be returned so I can't do an autopsy.
The reason I checked line pressure to begin with was that the shifts were so "loose" feeling that I had an inclination that I wasn't getting enough pressure, i thought maybe that i had something bleeding off, but I had no idea that it was going to be so low. I am surprised it would even hold the clutches together with only 75 psi. Of course, the first thing you should do when diagnosing a transmission shift concern is get out the line pressure gauge, especially with a 4EAT, since the older ones are bad about leaking off pressure on the pump gasket. There is a multitude of taps on the case that can show you pressure at every circuit.
__________________
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) |
#60
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Re: A question for the Transmission experts
I don't know if any/many of those transmissions with the paper gaskets are still out there. I've rebuilt dozens of 4eat's and I've only come accross one paper gasket and it was on a 90 turbo legacy transmission. I do expect we'll see a lot more solenoid A failures in the next couple years though so the more we can encourage people to check their pressure when things don't feel right the better.
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