AW 55-50 Transmission Glad to help!

[pfortescue]

Hello folks. Be kind to a noob please.

Am taking delivery on thursday of v70 d5 - and the VIN decipher tells me i have one of these ...... AW55-50SN

53 plate - model year 04 apparently though - should I be concerned, or despite all these posts, are the faults really few and far between.

25 minute test drive - wishing it was more now.

Paul

[iainp]

Hi have had this now 6 months put into Volvo independent for a flush and seem to still clunk down into first gear when hot

Gear box is great when cold lovely and smooth

Occasional holds gear when stuck in traffic

Any ideas would be great

Maybe reset the gearbox software if so any ideas how to do this

Cheers

[Nick44]

You probably need a software update for the TCM (transmission Control Module) and the neutral/stop patch loading. Main dealer only, but not too expensive.
Buzz back if you need help with the part number for the neutral patch.

[georgehifi]

Hope one of the gurus here has an answer for this.
OK here goes, AW55-50sn 100,000km, new oil AT3009 (Toyota T4) changed as per Vadis (two X 2 litre flushes then top up) I have not reset the TCM oil counter as the shifts are fine and smooth
But!!!! When cold first start in neutral or park engine feels a little rough between 1 and 2 thousand revs, no noises just cold motor vibrations I think.
For the first 10 to 15mins of driving with perfect shift pattern while transmission is still cold, a rotational rumbling (medium level), slight grinding (low level) sound from the left foot well with the accelerator just pressed a little or alot. With no acceleration (coasting) no rumbling or grinding.
Does not change with weaving or full lock either direction. After 15mins of driving all is perfectly quiet. This does not change even if I let the motor completly warm up before driving, noise is still there for 15mins of driving (till I think the atf warms up) Tranny shifts perfectly at all times.
Checked wheel bearings, CV joints and Tripod bearing all fine.

Hope you can shed some light on this, it's driving me nuts, a tranny specialist sugested I disconnect the TPS when cold, as he says it can build up the pressures too much in the tranny via the ECU and TCM and see if that shuts the rumling/grinding noises up??
Cheers George

[georgehifi]

Originally Posted by georgehifi

a tranny specialist sugested I disconnect the TPS when cold, as he says it can build up the pressures too much in the tranny via the ECU and TCM and see if that shuts the rumling/grinding noises up??
Cheers George

Tried that today, no joy still the same.

Any help would be great.

Cheers George

[daveb948576]

hi, im wondering if you can help, i have bought a broken vectra c auto with the af23 gearbox (aw55-50sn), the garage removed it that i bought it from so i then refitted the gearbox myself to see what the problem is, the car revs up in every gear and will not drive at all, not even any drop in revs when selecting 'D' i took the gearbox back out to the car and had a look inside at the gears and all seemed ok apart from i couldn't get the large nut undone thats inside the gearbox, i think its on the back of the pump, i was unable to remove the pump, i put the gearbox back in but it still does the same, it just revs up and will not drive anywhere. what would be the problem? will a broken tourqe convertor stop it from driving? the teeth inside seemed ok with some movement, the first set of teeth i was able to turn in both directions but the second set of teeth fell like they are fixed/secure, is this normal? is there a one way clutch inside the torque convertor?


whilst the casing was off the gearbox i was able to turn the large shaft that runs direct through the inside of the gearbox and the other section of the gearbox would turn but independantly, should they tun together with cogs engaged or do they rely on fluid pressure? do i have some cogs/teeth/clutch wrongly fitted? is there an assembly manual anywhere?

how can i remove the pump to see whats gone wrong?

is it the pump thats broken?
is it the torque convertor thats broken?
are the gears incorrectly fitted?

any help would be great,thanks.

dave.

[mrc1501]

Can anyone elaborate on 'resetting the fluid counter' that I have read a couple of times in this thread. What does it actually mean, and how is it done.

Just flushed my gearbox with Volvo ATF and quite intersted on what the above term means

[Nick44]

Hi,
This is a software item in the TCM.
It counts (I believe) the number of times the fluid exceeded certain parameters.
Has to be done by a Volvo main dealer.

[Fernando]

Hello

I have a V70 2002 with AW55-50SN with the neutral problem at idle, I went to the Volvo dealer in Chile(there is only one) and they say me that it is not possible to load the software 30646691 Neutral Control Remove.
If I bought the Vida DICE software , does it is included this patch or is it possible to get this software patch in some place
My second question if this neutral clutch operation is only in model 2001 and 2002, Is it possible to buy a 2003 or 2004 TCM and install it in my car, Is it possible to do that or it is necesary to set something

I would appreciate your help

[machavelu]

Hi, my lovely S60 2.0T manual transmission early 2004 model is gradually making me regret becoming a true volvo lover. It hangs occassionally between 2-3 gear shift. I took it to an inde volvo garage who test drove it and came to the conclusion the trans is dead. But, I'm not totally convinced since other gear shift works just fine. Besides, I was not given other options to the flare solutions other than being charged £800.00 to fix a new tran.

I have read in this lovely forum that an oil drain and fill plus a trans software update could solve the problem. Should I try these methods first? Does manual trans require draining? I be over the moon to get my joy back driving my volvo.