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-   -   Transmission kicks when switching to reverse. (https://xoutpost.com/bmw-sav-forums/x5-e70-forum/109971-transmission-kicks-when-switching-reverse.html)

Bmwfvr 03-15-2019 04:06 PM

Transmission kicks when switching to reverse.
 
i have been noticing my x5 kicking/jumping when I switch to Reverse gear. doesn't happen in the morning when i leave the house to work. Seems to happen more when the car is warmed up. I have had the transmission serviced by BMW dealership. they replaced the pan, filter and did a fluid flush I believe. Is the transmission going bad?!!

robnitro 03-15-2019 06:34 PM

Did it start happening after the fluid change? If so, you might be low a bit. The level check is a pain.

Also there is a mechatronic seal that sometimes starts to leak and it will cause issues with reverse because it leaks pressure, which might explain why it's not happening when cold-fluid is thicker then.

Bmwfvr 03-15-2019 09:51 PM

Quote:

Originally Posted by robnitro (Post 1157534)
Did it start happening after the fluid change? If so, you might be low a bit. The level check is a pain.

Also there is a mechatronic seal that sometimes starts to leak and it will cause issues with reverse because it leaks pressure, which might explain why it's not happening when cold-fluid is thicker then.

No it was happening before the fluid change. In fact the transmission didnt feel right in all gears before the fluid change. Shifting got very smooth afterwards except for the reverse gear. BMW tech noted it in the report and his Recommendation was to replace the transmission with an estimated cost of ~$5000!!

So the mechatronic is something i can replace without taking the pan off?

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Hack213 03-15-2019 10:02 PM

Quote:

Originally Posted by Bmwfvr (Post 1157552)
No it was happening before the fluid change. In fact the transmission didnt feel right in all gears before the fluid change. Shifting got very smooth afterwards except for the reverse gear. BMW tech noted it in the report and his Recommendation was to replace the transmission with an estimated cost of ~$5000!!

So the mechatronic is something i can replace without taking the pan off?

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Mechatronics are inside transmission pan. YouTube it

Bmwfvr 03-15-2019 10:09 PM

Quote:

Originally Posted by Hack213 (Post 1157557)
Mechatronics are inside transmission pan. YouTube it

Ok i just youtubed it. Is this supposed to be replaced as part of the transmission service?

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Hack213 03-15-2019 10:18 PM

Quote:

Originally Posted by Bmwfvr (Post 1157559)
Ok i just youtubed it. Is this supposed to be replaced as part of the transmission service?

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Only when they fail.. you would get a code and no it's not part of the drain and refill service

robnitro 03-15-2019 11:12 PM

Mechatronic sleeves, theyre rubber pieces that go between the mechatronic(valve body) and the trans.
When they start to leak the transmission acts up. I saw some kit on fcpeuro but don't have the link anymore
Here's a link from eBay to see how they look https://www.ebay.com/itm/MECHATRONIC...d=183185065492

SlickGT1 03-16-2019 12:36 AM

I suggest taking the valve body out and cleaning off the filters on the shift solenoids.

robnitro 03-16-2019 01:48 AM

Can you clean those screens without removing the solenoids or having to replace their o rings?

https://www.rangerovers.net/forum/6-...ky-shifts.html a link with pictures of that seal which goes bad

ard 03-16-2019 03:09 AM

We recommend the sleeve be replaced during a normal service if there are symptoms. But if you roll into a dealer and just ask for a fluid change, they just do that.

Few dealers ...actually none.. Will do work inside the trans case. As you've discovered... 'Just replace it'


Plenty of serviceable parts, need to find a trans shop if you can't DIY

GL


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