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TCM swap

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abcdetech
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abcdetech

TCM swap

Post by abcdetech » Sat May 04, 2019 7:57 am

Hi....I need a little help from transmission experts.

2006 Volvo XC70. 160K miles.
Transmission problem: transmission is "kicking" (like someone bangs you from behind) driving in town area, sometimes slipping. Problem started a year ago.
Things have been done: transmission flush, recalibration at dealership - that helped for 3-4 weeks but then problem started again.

The next step is TCM (transmission control module) replacement. Dealership quoted $2100. I've been told this process is a hot swap and no software upgrade required. So I purchased from swedish car experts a used part and they also confirmed this is a hot swap process. They have found a donor 06 Volvo S60 98K.
When part arrived I noticed that all numbers are matching but one.
I have two questions:
a. Is it Okay to swap TCM even if one number is not matching? Please compare attached images. Do you see a difference in numbers: T05353085 vs T05311535. Not sure what these numbers mean therefore double checking.
b. Is it really a hot swap process and no software upgrade required? I just pull out and insert a new module?

Thanks lot to everyone.
Attachments
IMG_6504.jpg
donor TCM
IMG_6504.jpg (70.8 KiB) Viewed 96 times
IMG_6503.jpg
original TCM
IMG_6503.jpg (91.45 KiB) Viewed 96 times



abcdetech
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abcdetech

Re: TCM swap

Post by abcdetech » Sun May 19, 2019 3:15 pm

Since nobody replied I went ahead and swapped TCMs. Computer gave an error - Urgent Transmission Service Required.

I was told by techs it's a hot swap but looks like not always a case. I put my original TCM back and error got cleared. Everything seems is back normal.

Just for the record, if someone will have same question.



precopster
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Re: TCM swap

Post by precopster » Sun May 19, 2019 5:46 pm

They CAN be a hot-swap if the same level of firmware is fitted to the car's system. If car went back to the dealer for a Canbus upgrade they will have different firmware versions. Both cars (donor and receiver) would have left the factory with the same level of firmware.

The hardware is the same. It's a 50:50 chance of getting a match.


Current cars:2002 XC70, 2001 V70 T5, 2006 XC90 2.5T, VW Transporter 2.5TDI

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abscate
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Re: TCM swap

Post by abscate » Sun May 19, 2019 8:12 pm

You went from band aid to brain surgery with the TCM swap.

The success rate of non-pros foolingwith ECM And TCM I so about 0.001

Get To a shop that’s knows Aisin transmissions, preferably in Volvo application or do a good used trams swap if you don’t want to learn the internals.


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vtl
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Re: TCM swap

Post by vtl » Mon May 20, 2019 9:30 am

abcdetech wrote:
Sat May 04, 2019 7:57 am
Hi....I need a little help from transmission experts.

2006 Volvo XC70. 160K miles.
Transmission problem: transmission is "kicking" (like someone bangs you from behind) driving in town area, sometimes slipping. Problem started a year ago.
Things have been done: transmission flush, recalibration at dealership - that helped for 3-4 weeks but then problem started again.
TCM has nothing to do with that. It's either a bad valve body or Haldex is dying. Pull the DEM fuse, if that did not help then try to add a couple of oz of Lubegard HFM into transmission. HFM eases clutch packs engagement and takes down ATF temperature.

Did you install additional oil cooler and inline magnetic filter for your transmission? No? This is the first thing to do in Volvo.


2002 V70 (sold)
2005 XC70 (Telos Road took it. Did a chassis swap...)
2016 XC60

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