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  #16  
Old 10-07-2020, 07:40 PM
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Trevor Trevor is offline
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Re: Slipping Transmission

Quote:
Originally Posted by lsupcar View Post
Trevor, I reread your link.
I could ask them again to check the line pressure to confirm a problem there, but in regard to solenoid a and the filter and debris, I am currently running a remanufactured svx transmission from Subaru installed in 2004, so shouldn't it have any updates in regard to a solenoid a filter? Is the solenoid a separately replaceable part?
I very much doubt that they will honestly check the line pressure and do they have a gauge with the required fitting? The too-hard basket is close at hand along with your cheque-book! Put the question to them, "do you have the factory manual test and diagnosis instructions?"

Yes the "A" solenoid is a seperate component and can be replaced without removing the transmission by dropping the pan and valve body. It is normal practice to replcae all the solenoids if the valve body is removed in consideration of the time/cost involved and the solenoids are often supplied as a ready wired complete kit.

You are prabably correct in ruling out a filtter blockage.

It would appear that the transmission is running in limp-home mode and should be driveable with care. Can you get the car to an honest good general mechanic, rather than a transmission specialist? Even a friend with mechanical knowledge. The manuals are available on line, check out the data yourself. Others here will help you find them. I can advise regarding adapting a pressure gauge.

Cheers, stick with it.
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  #17  
Old 10-07-2020, 08:31 PM
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Trevor Trevor is offline
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Re: Slipping Transmission

Attached is some additional data and write-ups I have previously posted, which should assist.
Attached Files
File Type: pdf Transmission Line Pressure.pdf (59.3 KB, 25 views)
File Type: pdf Trans. Press. Gauge User Instrs.pdf (48.6 KB, 18 views)
File Type: pdf Portable SVX Trany Press. Gauge.pdf (34.2 KB, 32 views)
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  #18  
Old 10-08-2020, 06:26 PM
lsupcar lsupcar is offline
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Re: Slipping Transmission

Thanks Trevor.
Don't you hate when you have to force someone to do their job correctly?
I actually have a paper copy of the service manuals, but anytime I have offered them to mechanics over the years, no one has ever been interested.
I will go through the troubleshooting checklist so I can understand the process better, but for some jobs I prefer to pass it off to a professional for resolution.
I have changed the tranny fluid and filter not long ago, but am unsure about doing any more invasive tranny work myself.
I understand that the reason to follow the diagnostic schematic is to avoid unnecessary repair, but am I correct that to avoid a complete rebuild, the only realistic hope is that the solenoids are bad? Which are tested with the pressure test. I confirmed that part is available for purchase. In a set of multiple like you said.
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  #19  
Old 10-08-2020, 09:24 PM
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Trevor Trevor is offline
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Re: Slipping Transmission

Quote:
Originally Posted by lsupcar View Post
Thanks Trevor.
Don't you hate when you have to force someone to do their job correctly?
I actually have a paper copy of the service manuals, but anytime I have offered them to mechanics over the years, no one has ever been interested.
I will go through the troubleshooting checklist so I can understand the process better, but for some jobs I prefer to pass it off to a professional for resolution.
I have changed the tranny fluid and filter not long ago, but am unsure about doing any more invasive tranny work myself.
I understand that the reason to follow the diagnostic schematic is to avoid unnecessary repair, but am I correct that to avoid a complete rebuild, the only realistic hope is that the solenoids are bad? Which are tested with the pressure test. I confirmed that part is available for purchase. In a set of multiple like you said.
It is always possible that a total rebuild is necessary but also likely that the fault could be due to a lack of line pressure due to the failure of solenoid "A". In the event that the line pressure is low you can decide accordingly.

In the name of common sense and logic, is it not obvious that the first off, the manufacturers instructions should be abided by and the line pressure checked? Would you fully overhaul an engine without first diagnosing a suspected faul? Please read all of my write-ups and Subaru's data and work from there.

You say, "Don't you hate when you have to force someone to do their job correctly?" I have been around for 91 years doing it all myself and only now, when having to rely on so called "tradesmen", am l constatly driven up the bloody wall. LOL You have my absolute sympathy!
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