[SwedishWoodChopper]

Hi All,

I'm not sure if I'm in the right place, but I've kind of hit a wall in my research. I've recently noticed my transmission is slipping a little when holding constant speeds in 6th gear, little slips while I'm cruising along especially when the transmission isn't warm enough. I drive a '08 E90 335i RWD, original motor, original transmission, and about 193,000 miles. I think the friction disks may be starting to wear down a little too much. I want to get some opinions on whether I should rebuild the transmission, or maybe someone else has had a similar issue and has some maintenance/repair they did to fix this issue. I also haven't really been able to find any good resources for rebuilding the transmission, I want to at least look into it to see if it's something worth doing. The transmission is a ZF 6hp16. Thank you all.

[musa]

I had somewhat similar issues but on my BMW X5 2005 4.4 with automatic transmission ZF 6hp26 at around 170K miles. I rebuilt it, completely refreshed the oil and it now shifts like new. I did all the work in my parking garage on my back .

https://xoutpost.com/bmw-sav-forums/...n-success.html

Go through the thread. Valuable info. I think it was an overkill to replace the mechatronic separator plate and damper pistons given no codes but only poor shifting and slips.

[GoRomeo]

Originally Posted by musa

I had somewhat similar issues but on my BMW X5 2005 4.4 with automatic transmission ZF 6hp26 at around 170K miles. I rebuilt it, completely refreshed the oil and it now shifts like new. I did all the work in my parking garage on my back .

https://xoutpost.com/bmw-sav-forums/x5-e53-forum/116264-launching-operation-fix-transmission-success.html

Go through the thread. Valuable info. I think it was an overkill to replace the mechatronic separator plate and damper pistons given no codes but only poor shifting and slips.

I paid a tranny shop to do it for me. Fully rebuilt . I am glad I did. My tranny is has been running great ever since.

[musa]

Originally Posted by GoRomeo

I paid a tranny shop to do it for me. Fully rebuilt . I am glad I did. My tranny is has been running great ever since.

How much did you pay? I want to sent my bill to my wife to pay up for the rebuild I did.

[ionme]

My advice is to 8hp swap,

Try to find 8hp45 from f30 n55, 8hp liver, CANtcu plug & play.

[GoRomeo]

Originally Posted by musa

How much did you pay? I want to sent my bill to my wife to pay up for the rebuild I did.

😂 I paid about $2500. 🙄

[musa]

Originally Posted by GoRomeo

😂 I paid about $2500. 🙄

Nice, that's quite reasonable for the amount of work. I would have estimated 3-4k.