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04 C70 Transmission disengages when hot

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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cuhfs
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Year and Model: 850,XC70,XC90,S60,80
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04 C70 Transmission disengages when hot

Post by cuhfs »

Anyone ever have this. Car runs fine for about 5 +/- miles. Once the transmission gets hot the transmission seems to shut down and car wont engage. Like a default safety to neutural. Wont move! not foward and not reverse. Dealer says it needs a new transmission. Thinking about doing the DIY transmission swap or DIY new valve bodys but don't want to burn the calories if it can be solved by far less drastic measures. Drain & fill and Seafoam Trans-tune have not helped. Any tricks or advice is welcome. Only problem is when HOT.
04 C70 Convert Auto
06 XC90 Auto (ORE) #401/800
06 S80
05 S80
12 S60
04 XC70 Auto (Parts car)
96 850 Wagon Manual Trans & 98 V70 (gone)
95 850 Sedan Auto Trans (gone)
04 XC70 Auto (gone)
04 C70 Convert (gone)
01 C70 Convert Manual Trans (gone)
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precopster
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Post by precopster »

Is there a transmission code or CEL?? If not I doubt you can solve this without a rebuild.

Hook Vida up to the car and read transmission fluid temperature. As you may know there is a fluid temperature sensor on the valve body. If it's reporting incorrectly or faulty the TCM may have a limp home mode for an overheat situation. The fluid temp sensor is on the upper right area of the valve body.

The overheat may actually be true due to something wrong in the transmission where binding is occurring. Changing the fluid temp sensor may solve if there is no issue.
Current cars VW Transporter 2.5TDI, 2010 XC90 D5 R Design
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cuhfs
MVS Moderator
Posts: 645
Joined: 31 August 2011
Year and Model: 850,XC70,XC90,S60,80
Location: New Jersey
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Post by cuhfs »

No code on my OBDII reader. Dont have the fancy VIDA reader but thinking about getting the china knockoff. Seems like no matter what I will have to get into transmission to fix it.
04 C70 Convert Auto
06 XC90 Auto (ORE) #401/800
06 S80
05 S80
12 S60
04 XC70 Auto (Parts car)
96 850 Wagon Manual Trans & 98 V70 (gone)
95 850 Sedan Auto Trans (gone)
04 XC70 Auto (gone)
04 C70 Convert (gone)
01 C70 Convert Manual Trans (gone)
Top
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E Showell
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Joined: 16 October 2008
Year and Model: ‘07 S80 3.2
Location: Long Valley, N.J.
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Post by E Showell »

So Rich, she's running again after a head rebuild or engine swap?
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (sold)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic (sold)
'04 XC70 Ruby Red Metallic (sold)
'95 855 auto (sold)
'86 245 manual (sold)
'05 V70 T5 M (totalled)
'06 V70 FWD Auto (totalled)
'02 Honda Insight CVT
‘04 Honda Insight CVT — “Yesterday’s car of tomorrow” (sold)
‘06 Honda Insight CVT
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E Showell
Posts: 3275
Joined: 16 October 2008
Year and Model: ‘07 S80 3.2
Location: Long Valley, N.J.
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Post by E Showell »

There's an outfit called VBX that will do a valve body exchange with guarantee for about $600. I believe they are here in Jersey as well.
Last edited by E Showell on 19 Sep 2015, 05:12, edited 1 time in total.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (sold)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic (sold)
'04 XC70 Ruby Red Metallic (sold)
'95 855 auto (sold)
'86 245 manual (sold)
'05 V70 T5 M (totalled)
'06 V70 FWD Auto (totalled)
'02 Honda Insight CVT
‘04 Honda Insight CVT — “Yesterday’s car of tomorrow” (sold)
‘06 Honda Insight CVT
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cuhfs
MVS Moderator
Posts: 645
Joined: 31 August 2011
Year and Model: 850,XC70,XC90,S60,80
Location: New Jersey
Has thanked: 17 times
Been thanked: 28 times

Post by cuhfs »

Yes. all good now. Sweet car. This transmission problem is on another one same model, I got in the mean time...
Last edited by cuhfs on 18 Sep 2015, 07:16, edited 1 time in total.
04 C70 Convert Auto
06 XC90 Auto (ORE) #401/800
06 S80
05 S80
12 S60
04 XC70 Auto (Parts car)
96 850 Wagon Manual Trans & 98 V70 (gone)
95 850 Sedan Auto Trans (gone)
04 XC70 Auto (gone)
04 C70 Convert (gone)
01 C70 Convert Manual Trans (gone)
Top
cuhfs
MVS Moderator
Posts: 645
Joined: 31 August 2011
Year and Model: 850,XC70,XC90,S60,80
Location: New Jersey
Has thanked: 17 times
Been thanked: 28 times

Post by cuhfs »

precopster / Mike - I PM you on this.
04 C70 Convert Auto
06 XC90 Auto (ORE) #401/800
06 S80
05 S80
12 S60
04 XC70 Auto (Parts car)
96 850 Wagon Manual Trans & 98 V70 (gone)
95 850 Sedan Auto Trans (gone)
04 XC70 Auto (gone)
04 C70 Convert (gone)
01 C70 Convert Manual Trans (gone)
Top
cuhfs
MVS Moderator
Posts: 645
Joined: 31 August 2011
Year and Model: 850,XC70,XC90,S60,80
Location: New Jersey
Has thanked: 17 times
Been thanked: 28 times

Post by cuhfs »

Closing this loop. Tried a valve body swap and it did not fix. Probably needs a rebuild.
04 C70 Convert Auto
06 XC90 Auto (ORE) #401/800
06 S80
05 S80
12 S60
04 XC70 Auto (Parts car)
96 850 Wagon Manual Trans & 98 V70 (gone)
95 850 Sedan Auto Trans (gone)
04 XC70 Auto (gone)
04 C70 Convert (gone)
01 C70 Convert Manual Trans (gone)
Top
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