AW 55-50 Transmission Glad to help!

[c_lee]

Originally Posted by mihkel

Well, tried to activate the solenoids. Shift solenoids all clicked. Linear solenoids SLS and SLU didn't make any audible sounds... Only SLT did. Could this mean that the SLU is stuck?

I cleaned the solenoids on the old box by taking them apart, so this wouldn't be a problem.

Wouldn't a stuck solenoid trigger a fault code if the converter won't lock?

I would have thought a solenoid failing to operate mechanically would have triggered a code being that, then, the input and output shafts will be out of range for the expected ratio but I don't KNOW whether it would.

If the solenoid electrical tests that you have done from within VIDA are to be relied upon then the TCM knows the solenoids are good electrically and neither open nor short circuit.

Maybe the TCM then assumes that mechanical operation has occurred, I don't know.

I if I were you I'd look through the list of possible fault codes for the TCM to see if there is an 'out of ratio' type code there that could be triggered if that condition existed.
That is what I did during my repair so that I had an idea what would, and would not, be indicated if the relevant fault condition existed.
It was quite a while ago now though and I don't remember all of it.

When I did my autobox repair each solenoid could be heard clicking clearly during testing.
( I'm just getting the inkling of a memory about a linear solenoid where that might not apply though. ISTR VIDA guiding me on that but not sure ).

That was on the AW 50-42LE and I would have thought the same would apply for the 5 speed box.

Maybe it is a lazy solenoid that needs a clean.

Colin

EDIT: Maybe after all that cat convertor lock up prevention procedure has got something to do with it.

[KBB]

Conducting a stall test would give an indication of any clutch pack slippage.

[mihkel]

Thanks for the replys!

Going to dig into VIDA for DTCs and all the parameters it will tell me and start from there. There's quite a lot information hidden in there if you look for it

And I tried the stall test, seems to be bang on, in about 2650 rpm. No sign of any slippage anywhere else aparts the TCC.

Oh, and as I read driving in W mode should deactivate the cat start function. Going to try that tomorrow, will sleep better then!

[mihkel]

Nope, winter mode does not help... so this is out of the question.

Hoping to get some time in the weekend to dismantle the solenoid.

If all else fails then the next culprit will be the new software.

[tonyalive]

Hi
I have an s60 2.4t with a 55-50sn box which i think has a flare
Not too sure what its called but drives like crap,
First seems fine most of the time 2nd to 3rd and 4th is going into nutral, revs go up then bang into gear 4-5 seems no issues at all
Also going into reverse seems clunky too
Seems not do it as much when cold, but as soon as its up to a bit of temperature it starts acting up
Ive read a lot of this thread and it seems like a common issue
Question is , is there much use in spending trying to repair bits and fluids or should i get a recon box
Also is it safe driving this box ? Can they keep going like this for a while obviously if i keep check and dont let it rev too much or is it a ticking clock ?
Thanks in advance if anyone is listening
Tony
Anyone in the cheshire / manchester area you could recomend

[savabill]

How many miles has the car done, what year is it and is there any evidence that the auto box has had the ATF changed?

[tonyalive]

sorry totally forgot, 2002 , 74k miles and no history so no idea on fluids

[tonyalive]

Originally Posted by tonyalive

sorry totally forgot, 2002 , 74k miles and no history so no idea on fluids

also fluid is light brown not pink so i guess never changed
i have had 4 volvos , d5, 2.4l, and 2 t5s all autos all never had fluid changes, and this one too, must be luck of the draw

[Nick44]

Has it got/had a towbar fitted?

[savabill]

A genuine 74k, isn't a lot of miles unless the car has been used for towing. I think my 1st port of call would be to do a couple of drain and fills, 500 miles apart, also I wonder if yours has still got the stop / neutral active. See link below.
http://www.volvoforums.org.uk/showthread.php?t=172033