New Owner 4.8is

[corima]

Looks like we have twins! A fantastic car to drive when everything is working right. The leaning? welcome to the club of air suspension owners. Pump the car up, take a spray bottle of thin soapy water spray all over the air bladder of the strut. Watch for tiny bubbles. I had to replace the two front ones on mine. I have the same transmission problem, plus some slipping in 3rd. The dealer so far isnt much help because they cant "reproduce" it. It only happends in 5th gear, at low speed, usually between 20 and 40mph. My thinking is that it is in 5th geatr and its trying to downshift into 4th, but halfway through, it changes its mind. Dont know why they cant reproduce it. It only happends all the time when anybody in my family drives it.

[serbiasrt8]

Originally Posted by corima

Looks like we have twins! A fantastic car to drive when everything is working right. The leaning? welcome to the club of air suspension owners. Pump the car up, take a spray bottle of thin soapy water spray all over the air bladder of the strut. Watch for tiny bubbles. I had to replace the two front ones on mine. I have the same transmission problem, plus some slipping in 3rd. The dealer so far isnt much help because they cant "reproduce" it. It only happends in 5th gear, at low speed, usually between 20 and 40mph. My thinking is that it is in 5th geatr and its trying to downshift into 4th, but halfway through, it changes its mind. Dont know why they cant reproduce it. It only happends all the time when anybody in my family drives it.

that's great!
So how much did it cost you to replace the two struts?

[Black5]

Originally Posted by corima

I have the same transmission problem, plus some slipping in 3rd. The dealer so far isnt much help because they cant "reproduce" it. It only happends in 5th gear, at low speed, usually between 20 and 40mph. My thinking is that it is in 5th geatr and its trying to downshift into 4th, but halfway through, it changes its mind. Dont know why they cant reproduce it. It only happends all the time when anybody in my family drives it.

Exactly. Mine does it when cruising steady at 60km/h (37.4 Mph). I know this and it's very noticeable because that's the most common speed limit and the regular cruising speed for the car. It feels like it's dropping a gear, but it doesn't. It's not hunting, which I understand as dropping and then changing up again. Slowing down a touch or speeding up a little cures it.
Very annoying that I have to be either slower or faster (A big No No here) than surrounding traffic.

I have heard this is common in the 7 series with the same transmission as well.

[Black5]

Originally Posted by Black5

Exactly. Mine does it when cruising steady at 60km/h (37.4 Mph). I know this and it's very noticeable because that's the most common speed limit and the regular cruising speed for the car. It feels like it's dropping a gear, but it doesn't. It's not hunting, which I understand as dropping and then changing up again. Slowing down a touch or speeding up a little cures it.
Very annoying that I have to be either slower or faster (A big No No here) than surrounding traffic.

I have heard this is common in the 7 series with the same transmission as well.

FYI to all you who followed this thread. Transmission lost 5th gear and failed soon after and required a rebuild. Rebuilder told me this issue is common with this transmission.