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Has that been established as a fact or is that frustrated humour?
Both !!!
Our analysis:
1 - (Big) Shock on the pan with hot ATF. This shock was not here when we changed ATF some weeks before.
2 - Dust / debris in free hot AFT flow
3 - When cold, dust and debris stuck in the valve body
1 - (Big) Shock on the pan with hot ATF. This shock was not here when we changed ATF some weeks before.
2 - Dust / debris in free hot AFT flow
3 - When cold, dust and debris stuck in the valve body
What?
Shock on the pan, hot fluid, dust???
People dont break these auto transmissions..they just dont. YEARS of negligence adds up one day, and it will suffer..but...
1 - (Big) Shock on the pan with hot ATF. This shock was not here when we changed ATF some weeks before.
2 - Dust / debris in free hot AFT flow
3 - When cold, dust and debris stuck in the valve body
Fabian,
I have suspected the dink in the pan as being relevant ever since you introduced it but the notion that it caused debris to enter the system would trouble me some.
I would think it is quite possible that some debris collects in the bottom of the pan and maybe that was disturbed by the "event" but how would such get past the filter unless the filter element was somehow distorted in the process and one presumes you would have spotted such?
As I understand the oil sits in the sump and is sucked into the filter that is normally flooded- presumably why it has a large footprint- and nothing should get past that element. For sure once that system is compromised and crap were to get in there, it would not take much to cause the problem you experienced. There is a lot to be said for ensuring one knows the real cause of such an event if for no other reason to learn from it.
That being said it takes quite some effort to dink the tranny pan [given the way it is somewhat recessed] or so I would think and if one did I am pretty sure one would know all about it. I have never read of such happening previously but as with most things in life there is always a first time!
I have never read of such happening previously but as with most things in life there is always a first time!
Bonjour Fred,
It was also the first time that a transmission was fully down !! I will never be sure about the root cause of my failure. I just try to understand a scenario
BTW, we will check and plug the vacuum line on next saturday. I hope it's the end !!
Well done ! 😃
The vacuum line was disconnected after the steel hose.
All upshifts change smoothly right now 😃👌
Now more slipping, just between 2400 and 2500 RPM. I will adujst it when I will receive my new modulation valve.
About B2 piston, I don't know if my B2 brake band clearance is good. Is it possible to try a longer pin without to remove the pan and to measure the B2 brake band clearance ?
Ie. If I have the pin of 48.0 mm, can I try the next pin of 48.8 mm ? All sizes are 47.2 mm, 48.0 mm, 48.8 mm, 49.6 mm.
It should be possible but I'll leave the answer to our tranny expert GB.
I don't think, that a longer pin will do the trick. AFAIK B2 is activated in all forward gears, if B2 fails you can only drive backwards.
08-21-2021, 07:49 AM
I will never be sure about the root cause of my failure. I just try to understand a scenario 
