Quote:
Originally Posted by Legokcen
Installed and registered a new AGM battery, same as what was there. Date on the old one was 9/15, so almost 5 years old. Anyway, new battery in and registered. Started off with a myriad of codes since it sat with no batter for a couple hours.
All codes were wiped and restarted. It restarted well and I did another scan. All clean. I put it in drive and all felt good. I drove down the drive way in D until the end. Stopped before entering the road and as soon as I stopped, the transmission message came on the screen. Rescanned and got:
4F84 Ratio monitoring, clutch D
Drove down the road for 1/4 mile to turn around (I didn't want to put it in reverse and have it lock the gears out again. Was in limp mode the whole time.
While driving, I erased the codes. Opened back up and could drive normal again. Got to the house and pulled in. Got another error when I stopped in the driveway.
Again, 4F84 Ratio monitoring, clutch D.
Goes right back into park immediately.
So, not the battery, clearing the codes brings it back after a little drive. Earlier codes were clutch A, now it is clutch D. What would be a good next step?
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My suggestion is to do the bridge seal which will require dropping the pan & valve body.
It's not super difficult, the big things to remember are to be careful with the sealing sleeve and to be sure to engage the park sensor while reinstalling the valve body. It is possible to bend the pins for the electrical connector on the transmission and that is an expensive fix. Also as general advice, crack the fill plug loose as the first step so you know you can get fluid back in; do NOT open it with the vehicle off or you will spill fluid everywhere. Otherwise the most challenging part is getting the fluid level correct as it must be done with the X5 running, level, and at specific temperature.
Here's a good set of instructions. You don't need to drop the front driveshaft and I think the fill plug is an 8mm allen.
https://www.bmwrepairguide.com/bmw-e...ent-zf-6hp19x/ This link should have the proper tightening sequence and torque values
http://www.thectsc.com/images/pdf/th...eplacement.pdf