[Bigrich45]

I have a 2008 BMW 328xi, bought the car new back in 2008 and she's still my baby. Never had any serious issues. But my car now has 170,000 Miles. I hear the transmission usually starts to fail around 150-200 thousand miles. My transmission still seems to work fine. Every now and then I get a rough feeling shift but that's about it. Do you guys think I'm going to have to replace my transmission soon? I've seen some used ones on eBay with under 80,000 miles for under 1000$ USD. How much do you think a shop would charge for them swapping out my transmission for one I give them.

[CTinline-six]

Where did you hear the transmissions start to fail around 150-200k? I've never heard that, and there are quite a few on here with 200k+.

Have you ever changed the fluid and filter? I would start there, and recommend Valvoline MaxLife Synthetic for the GM 6L45 transmission.

[e90yyc]

Mine has nearly 200k miles on it and is definitely on its last legs, but it was quite low on fluid at one point, and I’m pretty sure I made the problem worse by changing some components in the valve body in an effort to improve things.

No need to replace it unless you’re really bothered by its performance

I have my doubts the dealership will want to install a unit you provide. Even if they would, I’d suggest taking it to a reputable transmission shop or indy for the install instead.

As CT mentioned, try fluid/filter first and then go from there.

[Bigrich45]

Originally Posted by e90yyc

Mine has nearly 200k miles on it and is definitely on its last legs, but it was quite low on fluid at one point, and I'm pretty sure I made the problem worse by changing some components in the valve body in an effort to improve things.

No need to replace it unless you're really bothered by its performance

I have my doubts the dealership will want to install a unit you provide. Even if they would, I'd suggest taking it to a reputable transmission shop or indy for the install instead.

As CT mentioned, try fluid/filter first and then go from there.

Whoops I didn't mean dealership lol, I meant shop

[Bigrich45]

Originally Posted by CTinline-six

Where did you hear the transmissions start to fail around 150-200k? I've never heard that, and there are quite a few on here with 200k+.

Have you ever changed the fluid and filter? I would start there, and recommend Valvoline MaxLife Synthetic for the GM 6L45 transmission.

Ya I get the transmission oil changed I believe every 40,000 miles.

[S65Hunter]

What about the trans mounts?

[Bigrich45]

Originally Posted by AlpineE93

What about the trans mounts?

So I just checked and my car has never had a transmission fluid change, BMW said they say not to change the transmission Fluid. But my local shop says I need it

[CTinline-six]

Change the fluid.

[Efthreeoh]

Originally Posted by Bigrich45

So I just checked and my car has never had a transmission fluid change, BMW said they say not to change the transmission Fluid. But my local shop says I need it

For the E90, BMW states to change the automatic transmission fluid at 100,000 mile intervals. It is stated in the maintenance booklet that comes with the original set of manuals in the trunk.

[BadContrakt]

Service your tranny!