the pressure drops off real quick ,also this is the same problem that i had at first when i decided to pull and rebuild it. im thinking it must be a stuck or leaking valve but what im not sure of is how to find it because it does not do it until it warms up the first time it will go for about 5 minutes ,then if shut off and restarted it drops off in about a minute.
>
>>> >>>> Hi all
>>>>
>>>> Im hoping someone else has had this problem and lead me in the right
>>>> direction.i have a 96 civc automatic
>>>> What happens is the thing will go into all gears and run and shift good >>>> for
>>>> about 5 minutes then it just like its in neutral.until you turn off the >>>> car
>>>> and wait for 30 -45 seconds ,restart car and it will go in gear again >>>> for
>>>> a
>>>> few minutes .then repeat it all
>>>> over again.
>>>>
>>>> I have rebuilt the a4ra trans, put in new clutches and steels and all
>>>> seals ,and put in a re-manufactured torque convertor ,cleaned all the >>>> valve
>>>> bodys untill the valves would drop on thier own without getting hung up
>>>> ,replaced a cpc broken spring .checked all solenoids.
>>>>
>>>> I have pulled it out and disassembled for a 2nd time now.
>>>> What happens is the thing will go into all gears and run and shift good >>>> for
>>>> about 5 minutes then it just like its in neutral.until you turn off the >>>> car
>>>> and wait for 30 -45 seconds ,restart car and it will go in gear again >>>> for
>>>> a
>>>> few minutes .
>>>>
>>>> I hooked up a gauge to the line pressure port its 125-130 and steady >>>> until
>>>> the few minutes then it drops to between 20-40 lbs ,you can shut the >>>> thing
>>>> off for 30-45 seconds and restart and the pressure will return to >>>> normal
>>>> and
>>>> go in gears again for another few minutes do you think it is a sticky >>>> valve
>>>> ? ,i read the pump gears with a feeler gauge and they are within specs >>>> ,
>>>> thanks huge in advance.
>>>>
>>>>
>>>
>>> have you put a meter on the electrical input for the control solenoids >>> and
>>> monitored their input? if the ecu is not giving them the correct >>> signal,
>>> then you will have all kinds of issues. for starters, try measuring the
>>> line pressure with the solenoids unplugged and see if that makes any >>> difference.
>>>
>>>
>>> --
>>> nomina rutrum rutrum
>>
>>
>
> people get bent out of shape about top posting too!
>
> > I have replaced the ecm with no change ,i have tried unhooking solenoids
> > still same pressue drop.
>
> ok.
>
> did this transmission have this problem before you did this work? you
> said you'd replaced a cpc spring so i'm wondering if there was a reason
> the original broke.
>
> also, when the pressure drops, is it sudden, or gradual when you run the
> line pressure gauge? if the former, there's some kind of hydraulic
> circuit issue with a valve opening but not closing again rather than pump
> or wear leakage which tends to be gradual as temp increases.
>
> as to what hydraulic issue that might be, it's hard to say because it's
> not a common fault so it's not like a load of people have experience of
> it - and certainly not me.
>
> bottom line, while i think it's awesome you're doing this, there comes a
> point where practical reality outweighs the value of the science project.
> more specifically, working used transmissions are so cheap, the time spent
> fixing this is not well spent vs. just replacing it with one that does > work.
>
> that said though, because i prefer a science project fix rather than
> replacement myself, i'd buy a second transmission and strip the two down
> side by side and see what's going on. maybe a ball bearing valve went > awol?
>
> good luck, and keep us posted.
>
>
> > help me out what is cross posting ?
>
> in the "to:" field at the top of your news reader, add all the groups your
> posting to at once. much like you'd add multiple names to an email. that
> way, the folk that read some groups and not others will still see
> collective responses.
>
> >
> >
>
>
> --
> nomina rutrum rutrum