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

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

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

Post by vtl » Tue Nov 12, 2019 7:41 am

External filter gets only a part of ATF that is circulating inside the transmission, by design. All that escaped gunk will be flowing through the valve body, that's why transmission is dying later. The colder the ATF, the higher is the pressure, the lesser amount of ATF is diverted by the ball valve to the cooler.

Just be aware.


05 XC70 260k, 16 XC60 40k, 19 Tundra 1k

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

Post by renns » Tue Nov 12, 2019 8:34 am

Hopefully the repeated flushings via dipstick hole will clean things out well enough. Time will tell.


1994 850 5-speed wagon, retired at 400,000 km
1998 V70 AWD 5-speed, retired at 358,000 km.
2005 XC70 275,000 km - daily driver

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

Post by renns » Thu Nov 14, 2019 8:07 am

The job is now complete, and the car is back on the road, with 100 km of driving so far. It shifts fine when warm, but has does still have some random flares when cold. The horrible transmission howling sound on startup is now completely gone. I had to reset transmission codes twice in the first couple km's of driving, but no further codes have been set since. Hopefully this 'fix' buys us enough time to source a suitable replacement vehicle. Many thanks to those adventurous souls that posted this information.


1994 850 5-speed wagon, retired at 400,000 km
1998 V70 AWD 5-speed, retired at 358,000 km.
2005 XC70 275,000 km - daily driver

renns
Posts: 441
Joined: Sat Sep 01, 2007 6:12 pm
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Re: AW55-50SN woes-easy to repair?

Post by renns » Sun Nov 24, 2019 4:09 pm

A quick update: The odometer has now rolled past 700 km since the 'fix' described in this thread was applied. The transmission has settled down nicely, with flare issues gone. Considering the car was not drive-able, and destined for the recyclers a couple weeks ago, the transformation is amazing.


1994 850 5-speed wagon, retired at 400,000 km
1998 V70 AWD 5-speed, retired at 358,000 km.
2005 XC70 275,000 km - daily driver

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

Post by precopster » Fri Nov 29, 2019 3:47 am

I missed this journey as you posted. Well done!
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renns


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

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

Post by renns » Fri Nov 29, 2019 9:58 am

Well over a thousand km's now, and am starting to have faith in the old girl once again. We've been shopping for newer replacements (Venza, Murano, RX-350...), but the XC70 is hard to replace - Luxury, loads of interior space, 3500 lb towing capacity, AWD...


1994 850 5-speed wagon, retired at 400,000 km
1998 V70 AWD 5-speed, retired at 358,000 km.
2005 XC70 275,000 km - daily driver

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