[whoismorggan]

Originally Posted by PghBMW

What plugs did you go With? I know this is probably not going to get solved here without experiencing it. Sometimes when I'm WOT it feels like the trans can't keep up with shifting and it's hesitating to accelerating. I was coming back home last night and was at 65-70 and hit the gas and the car went to accelerate and stuttered a little bit then accelerated. I have an xDrive car.

It was the front transfer case. I've turned on xDelete which makes the car full RWD and it feels night/day better!

Another forum member mentioned he had the same issue and it was resolved by doing a fluid flush.

[PghBMW]

Originally Posted by f20two

It was the front transfer case. I've turned on xDelete which makes the car full RWD and it feels night/day better!

Another forum member mentioned he had the same issue and it was resolved by doing a fluid flush.

If new NGK iridium plugs gapped at .023 don't fix my issue that's what I'll be doing next

[whoismorggan]

Originally Posted by PghBMW

If new NGK iridium plugs gapped at .023 don't fix my issue that's what I'll be doing next

I did the same plugs and gap, also replaced all six coil packs and still felt the stutter. After xDelete it was gone. Good luck!

[PghBMW]

Originally Posted by f20two

I did the same plugs and gap, also replaced all six coil packs and still felt the stutter. After xDelete it was gone. Good luck!

Originally Posted by f20two

It was the front transfer case. I've turned on xDelete which makes the car full RWD and it feels night/day better!

Another forum member mentioned he had the same issue and it was resolved by doing a fluid flush.

Originally Posted by f20two

I did the same plugs and gap, also replaced all six coil packs and still felt the stutter. After xDelete it was gone. Good luck!

xDelete isn't super expensive might do that

[whoismorggan]

Very true. It also drives better imo. I prefer it over xdrive if I'm doing anything other than 0-60 launches

[PghBMW]

Originally Posted by Liandri

Heh lifetime means lifetime of the warranty, but they don't tell you that. Changing all driveline fluids every 30-40k results in happy ownership and long lasting components. This should be at the top of everyone's to do list before tuning. I changed the rear diff oil on my 2016 with only 20k on the whole car and it looked like garbage. Did the trans right after bit hard to tell with the 8hp fluid as it's fairly dark looking when new

Originally Posted by Liandri

Heh lifetime means lifetime of the warranty, but they don't tell you that. Changing all driveline fluids every 30-40k results in happy ownership and long lasting components. This should be at the top of everyone's to do list before tuning. I changed the rear diff oil on my 2016 with only 20k on the whole car and it looked like garbage. Did the trans right after bit hard to tell with the 8hp fluid as it's fairly dark looking when new

Ended up flashing my transmission with bootmod3 and the issue is 100% gone.

[Bibopp]

For those who have the issue related to the transfer case, a fluid change is the thing to do + replacing the bottom drain plug by a strong magnetic plug. ECS have this kind of magnetic plug and it really does a difference especially for transfer cases because of the metal shavings they generate. These plugs are also very useful in front differential and rear differential

[whoismorggan]

Originally Posted by Bibopp

For those who have the issue related to the transfer case, a fluid change is the thing to do + replacing the bottom drain plug by a strong magnetic plug. ECS have this kind of magnetic plug and it really does a difference especially for transfer cases because of the metal shavings they generate. These plugs are also very useful in front differential and rear differential

Good tip. Thanks you!