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AW55-50SN woes-easy to repair? Topic is solved

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stringmonkey
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stringmonkey

Re: AW55-50SN woes-easy to repair?

Post by stringmonkey » Sun Dec 03, 2017 2:25 pm

Hi All,

I've been searching these forums for a problem I encountered the other day and I think this thread may be relevant.

2001 V70 2.3 T5 Auto w/ Geartronic
126,000 miles w/ a transmission that was replaced @ about 80k.

Transmission Service Required light on w/ P0740 Torque Converter Clutch Circuit/Open
P1618 (unknown w/ generic my scanner)

I hadn't put much thought into a whining sound other than the weather changing and the engine being colder in the morning but I noticed a little bit of a whine when my wife drove away a couple weeks back. This was described earlier in the thread as the transmission possibly be starved of fluid. Neither of us other than the whine had noticed anything else and from my memory the whining did go away after everything was warmed up a couple minutes down the road.

Fast forward to last week I was driving on the freeway @ 70mph (and had recently engaged cruise control). Shortly after that the Trans Service Required light and check engine light illuminated simultaneously. The gear indicator only had a "-" rather than "D", "R", or "P". There were no noticeable changes in the remaining 20 minutes of freeway driving. I exited the freeway and came to a complete stop, and accelerated without any noticeable change. After the next stop, I accelerated and engine RPM's raised abnormally higher and it seemed the transmission was slipping. Each stop after that progressively got worse until I made it to the driveway at home miraculously and had to push it into my parking spot.

There were no bad smells, sounds, or anything else that would have hinted at a problem so I'm absolutely lost.

Today I started it and was able to pull forward in drive after cycling through gears but in reverse the engine simply revs and the gear never engages.

Here's a little video clip...



Thanks in advance!



precopster
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Re: AW55-50SN woes-easy to repair?

Post by precopster » Sun Dec 03, 2017 4:20 pm

Thanks for the input 22volvo!! That is very interesting that the fluid was replaced then the BG transmission flush was introduced to further clean and draw out sediment. I still wouldn't use a flushing service unless I was personally running the machine and ensuring its cleanliness.

My car is still going strong after unblocking the filter but I wouldn't discount the possibility of a more thorough cleaning so kudos for including your experience to this thread!


Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

precopster
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Re: AW55-50SN woes-easy to repair?

Post by precopster » Mon Dec 04, 2017 3:22 am

stringmonkey that fluid is not only dirty; it's filthy. That will come out like mud when it's drained.

The horizontal line was also on my dashboard when the filter blocked as I recall. The whining noise is a starved transmission pump due to a blocked filter.

First step would be to replace that fluid with Toyota T-IV fluid or any JS-3309 compliant fluid. Then if pump whine is still apparent you can pierce the casing as I did and unblock the filter with a long stiff wire or skewer.

This would not be handled by a mechanic's shop as they wouldn't accept the liability of further damage. However if the car isn't moving it is a given thing that a rebuild is needed and they may agree to the filter piercing if they are competent at making a new thread and sump bolt.


Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

precopster
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Re: AW55-50SN woes-easy to repair?

Post by precopster » Tue Dec 05, 2017 1:47 pm

Stringmonkey look into fluid replacement and afterwards using that BG transmission flush. You may not need to bypass the filter as I did and it's less work.


Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

vt9000cse
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vt9000cse

Re: AW55-50SN woes-easy to repair?

Post by vt9000cse » Wed Dec 27, 2017 6:06 am

Stringmonkey.

That's basically the same thing my 2003 Saab 9-3 Linear with the same transmission would do. Sometimes after sitting for a significant period of time it would work but then die. One time I drove about 2 miles and then it died. I would then turn off the car, wait for a few minutes and then drive another 1/10th of a mile until it started slipping or stop. Then shut off car. Now I've got it so it'll work but I'm currently stuck with 1st and 2nd and Reverse. I think my valve body is clogged up with all the crap I cleaned out when I pierced my current filter.

I'm currently in the process of running the car with an inline transmission filter on the out port of the transmission cooler. It's winter in Vermont right now so I'm waiting until I can get a clean day to drive the car to my shop to drain the fluid and pull the valve body cover off and clean out all the transmission solenoids and valves and the valve body. I have two complete transmissions and many solenoids to allow me to clean one set and have ready to swap in.

I hope to hear from you on what you end up doing to resolve your Volvo Woes.

vt9000cse
stringmonkey wrote:
Sun Dec 03, 2017 2:25 pm
Hi All,

I've been searching these forums for a problem I encountered the other day and I think this thread may be relevant.

2001 V70 2.3 T5 Auto w/ Geartronic
126,000 miles w/ a transmission that was replaced @ about 80k.

Transmission Service Required light on w/ P0740 Torque Converter Clutch Circuit/Open
P1618 (unknown w/ generic my scanner)

I hadn't put much thought into a whining sound other than the weather changing and the engine being colder in the morning but I noticed a little bit of a whine when my wife drove away a couple weeks back. This was described earlier in the thread as the transmission possibly be starved of fluid. Neither of us other than the whine had noticed anything else and from my memory the whining did go away after everything was warmed up a couple minutes down the road.

Fast forward to last week I was driving on the freeway @ 70mph (and had recently engaged cruise control). Shortly after that the Trans Service Required light and check engine light illuminated simultaneously. The gear indicator only had a "-" rather than "D", "R", or "P". There were no noticeable changes in the remaining 20 minutes of freeway driving. I exited the freeway and came to a complete stop, and accelerated without any noticeable change. After the next stop, I accelerated and engine RPM's raised abnormally higher and it seemed the transmission was slipping. Each stop after that progressively got worse until I made it to the driveway at home miraculously and had to push it into my parking spot.

There were no bad smells, sounds, or anything else that would have hinted at a problem so I'm absolutely lost.

Today I started it and was able to pull forward in drive after cycling through gears but in reverse the engine simply revs and the gear never engages.

Here's a little video clip...



Thanks in advance!



mygreent5
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Re: AW55-50SN woes-easy to repair?

Post by mygreent5 » Sat Dec 30, 2017 6:00 am

precopster wrote:
Tue Oct 31, 2017 3:34 am
Another 1000kms and now the TCM has adapted to the new fluid pressure. 1st to 2nd is perfect and no thumping on downshifts at all. Smooth as silk......

I can now slip the gear lever into the manual gate, rev the motor to 5,000rpm with full throttle and change gear to 2nd with a clean snappy shift.
How is your car going on? Still smooth as silk.... :)
Total kms till today?...



precopster
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Re: AW55-50SN woes-easy to repair?

Post by precopster » Sat Dec 30, 2017 6:00 pm

Hasn't missed a beat transmission wise. Has 235K on the clock now (that's kilometres). I've replaced O2 sensor, MAF & front brakes done as finally I feel I can invest without calling for a tow home. viewtopic.php?f=35&t=83245
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mygreent5


Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

vt9000cse
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vt9000cse

Re: AW55-50SN woes-easy to repair?

Post by vt9000cse » Sun Feb 18, 2018 5:58 pm

Update on my Saab 9-3 with the clogged filter. After getting it running in November it stopped working correctly. It would shift into 1, 2 and Reverse. No higher no matter what I tried. Took the valve body out of the transmission and cleaned all the solenoids. They were all gunky like these pictured. Then ran 12 volts on each one and blew air through each one to ensure the valves operated correctly. Put it all together and will test drive it on Monday (east coast time zone). I am excited that we may have come up with a solution on these transmissions. I also added an aftermarket higher volume filter 3/8 inch in line with the cooling lines. Replaced all the fluid with some Castrol which is rated as Type IV equivalent.
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precopster
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Re: AW55-50SN woes-easy to repair?

Post by precopster » Sun Feb 18, 2018 6:24 pm

Good luck with the test drive !!

Watch those serrated clamps on the inline filter. They have a habit of perforating hoses.


Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

vt9000cse
Posts: 24
Joined: Wed Nov 01, 2017 9:54 am
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vt9000cse

Re: AW55-50SN woes-easy to repair?

Post by vt9000cse » Sun Feb 18, 2018 11:31 pm

I see that the clamps are doing damage to the hose to the inline external transmission filter already. Thanks for the heads up. I usually use "fuel injection hose clamps" to prevent that. But this is hopefully a temporary setup until I can figure out how to best route everything and keep the filter and the transmission cooler plumbing to the radiator. It's a tight squeeze in there. Thankfully this is the 2.0T four cylinder. Saab squeezes the GM 2.8 V6 Turbo inside this same engine compartment.

I promise to keep the Volvo group up to date on the Saab Story. With the shared Aisin transmission.



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