[Epic404]

2007 335i Conv 130k Auto

Due to a plethra of problems, I was going to get rid of her...but I've have had a change of heart. If I can get this transmission issue diagnosed and remedied I'm going to stick it out.

These are the symptoms:

• Hard 3rd to 4th shifts with a 500 RPM spike.
• An eeeert bark during the shift.
• Sometimes the yellow gear.

These symptoms were rapidly getting worse the last couple months, so much that I had to really lay off the gas to keep the yellow gear error at bay.

I reset the transmission adaptation a couple days ago (BT cable) and now all problems are amplified and I can't make it more than a couple miles without the yellow gear coming up...so it's nearly inoperable. Below is my gearbox info and error codes. Any ideas???

4F82
Gear transmission ratio B
Error will not cause a warning light
Error is not currently present
Test conditions have not been completed

4F85
Gear transmission ratio E
Error will not cause a warning light
Error is not currently present
Test conditions have not been completed

4F89
Speed transmission ratio 3-4
Error will not cause a warning light
Error is not currently present
Test conditions have not been completed

Gearbox control unit

Hardware Number

7591971
Hardware Version Number

15
Coding Index

05
Diagnostic Index

0204
Variant Index

534D
Date Of Manufacture

20070131
System Supplier

Bosch
Message Catalog Version

0.29.69
Software Version

215.64.1
OS Version

2.3.10
ModuleID

GS19D

[mojobmw_e90]

Shift solenoid might be bad, also while in there replace the Megatron unit. Get fresh fluid and new pan which comes with gasket

[BeastMode335i]

Originally Posted by mojobmw_e90

also while in there replace the Megatron unit.

Here's the schematic on that specific unit, just as a reference..



you're welcome..

[924er]

I hope I'm wrong but my buddy had similar codes but different symptoms. The gear ratio monitoring code came up and the dealer said the tranny is no good. Another thing is the solenoid but that is also worth replacing the transmission since its deep inside the tranny. A fluid flush and pan won't help. Someone correct me if I'm wrong. Hope I am. Good luck man.

How many miles ?

[chinko]

Originally Posted by BeastMode335i

Here's the schematic on that specific unit, just as a reference..



you're welcome..

Seriously though, hope you it's nothing too serious OP.

[OzCoE92]

Have you changed the fluid recently?

[Jeff@TopGearSolutions]

First step is to change fluid. That fixes a lot of issues with AT's.

[Epic404]

Originally Posted by mojobmw_e90

Shift solenoid might be bad, also while in there replace the Megatron unit. Get fresh fluid and new pan which comes with gasket

Thanks mojo

Originally Posted by BeastMode335i

Here's the schematic on that specific unit, just as a reference..



you're welcome..

Might need special tools for that.

Originally Posted by 924er

I hope I'm wrong but my buddy had similar codes but different symptoms. The gear ratio monitoring code came up and the dealer said the tranny is no good. Another thing is the solenoid but that is also worth replacing the transmission since its deep inside the tranny. A fluid flush and pan won't help. Someone correct me if I'm wrong. Hope I am. Good luck man.

How many miles ?

130k

Originally Posted by chinko

Seriously though, hope you it's nothing too serious OP.

Thanks, me too but it doesn't sound like it.

Originally Posted by OzCoE92

Have you changed the fluid recently?

Originally Posted by Jeff@TopGearSolutions

First step is to change fluid. That fixes a lot of issues with AT's.

I changed the pan, gasket, and fluid about 10k ago. I also did the shifter wire fix at that time. Where to go from here, should I just replace the whole transmission with a used one? I'll do some research but anyone know off the top of their head how long transmission replacement takes?

[Jeff@TopGearSolutions]

Originally Posted by Epic404

Thanks mojo



Might need special tools for that.



130k



Thanks, me too but it doesn't sound like it.




I changed the pan, gasket, and fluid about 10k ago. I also did the shifter wire fix at that time. Where to go from here, should I just replace the whole transmission with a used one? I'll do some research but anyone know off the top of their head how long transmission replacement takes?

Honestly if it was my car I would take it to an independent transmission shop for diagnosis.

[ferocity02]

Do a Google search on your codes. You'll find a lot of people, mostly with 5 and 7 series, who have had similar codes and fixed them. If you're good with tools you can pull the valve body off and check for anything obvious and clean it out. Beyond that you'll need to pull the transmission.

[Nismo G]

The money and time you are going to spend diagnosing it is going to be the same as just getting a used one from LKQ

http://www.ebay.com/itm/2007-2011-BM...531ebe&vxp=mtr

$600 +$150 shipping. I'm sure labor at a local garage is like 5 hours max? all in all your out $1200.