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Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

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racertim
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racertim

Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by racertim » Fri Mar 08, 2019 10:08 am

It was suggested that I post in the s60 forum since drive trains are the same as my XC90. Here is my post: I have a 2006 XC90 fwd 2.5t with 150K. Long story needed to have engine replaced. Local mechanic shop (son-in-law but that's another long story) replaced engine with a good used one. Took him forever to get it done so car sat for months at a time. Finally done, engine runs great BUT when you shift it into Drive, it will go forward and shift through the gears. When you come to a stop and want to put it into reverse it will not go into reverse. If you disconnect the battery and then reconnect it, it will then shift into reverse. Same story going back into drive. You have to disconnect the battery and reconnect and then it will shift into drive. So he takes it to local AMCO shop to look at it. All they can say is that the transmission needs rebuilt. The transmission worked flawlessly before the engine was replaced. I am thinking so did they not hook up a wire correctly or what? I find it hard to believe that it was working great before the change out and now it just isn't. I called the local European Motors shop and they said $3000 to replace the transmission with a used transmission. But I am not convinced that is the issue. Does anyone have any advice on how to diagnose what might be happening? The car is in great cosmetic shape, but need to get the mechanical stuff right!
Thanks!



xHeart
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Re: Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by xHeart » Fri Mar 08, 2019 11:53 am

racertim wrote:
Fri Mar 08, 2019 10:08 am
... engine runs great BUT when you shift it into Drive, it will go forward and shift through the gears. When you come to a stop and want to put it into reverse it will not go into reverse. If you disconnect the battery and then reconnect it, it will then shift into reverse. Same story going back into drive. You have to disconnect the battery and reconnect and then it will shift into drive. [...]

Does anyone have any advice on how to diagnose what might be happening? The car is in great cosmetic shape, but need to get the mechanical stuff right!
Thanks!
I had similar issues after 3 weeks of unplugged battery due to maintenance and repair.

To help get started. What is the age of fluid, level, and make?


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

racertim
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racertim

Re: Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by racertim » Fri Mar 08, 2019 12:12 pm

Haven't touched the fluid since before the engine change-out. Only checked the level.



xHeart
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Re: Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by xHeart » Fri Mar 08, 2019 12:58 pm

Unless you're certain it is an electrical issue, fluid change is a good first step. Mobil ATF 3309 works for AW55-xx transmissions.


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

IslandV70
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Re: Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by IslandV70 » Fri Mar 08, 2019 2:49 pm

Doesn't this sound more like software than fluid?????????



xHeart
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Re: Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by xHeart » Sat Mar 09, 2019 7:17 am

It does. There could be any number of things.

In our situation, a FULLY charged battery and several drive cycles brought gear shifting back to normal. ATF getting HOT is important for transmission adaptation.

Any stored DTCs?

Some variables https://www.matthewsvolvosite.com/forum ... 8&start=30
Last edited by xHeart on Sat Mar 09, 2019 7:23 am, edited 1 time in total.


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

racertim
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racertim

Re: Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by racertim » Sat Mar 09, 2019 7:21 am

No codes



IslandV70
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Re: Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by IslandV70 » Sat Mar 09, 2019 7:58 am

My car went into a mode where it would barely drive due to a low battery. Just driving it and restarting it fixed it.



racertim
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racertim

Re: Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by racertim » Sat Mar 09, 2019 9:15 am

I put a new battery in, no change



IslandV70
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Re: Automatic transmission wont shift unless battery disconnected 2006 fwd 2.5

Post by IslandV70 » Sat Mar 09, 2019 9:22 am

I think you need VIDA to see what is what.



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