[Dani988]

Greetings,

I'm having an issue with my ZF8HP on my 320ED for which the root cause can't be identified by local dealer.

Please see video here:

In this video the doors are open and the sound made by shock can also be heard.
Shock occurs when stationary and switching from D or R to P. This does NOT happen while driving.
Gearbox ZF8HP has been COMPLETLY REPLACED (including oil change and gearbox values reset) with a new one by local BMW dealer but shock problem is still present.
Please share thoughts and solutions.
Thanks!

[RJR82]

could be a bit of play somewhere in the drive shaft, one of your guibo's mabe,
when going into D its taking up slack if you know what i mean, but i would have thought they would check things like this when swapping out gearbox,
just an idea!

[Dani988]

Originally Posted by RJR82

could be a bit of play somewhere in the drive shaft, one of your guibo's mabe,
when going into D its taking up slack if you know what i mean, but i would have thought they would check things like this when swapping out gearbox,
just an idea!

Thanks for your support.
Do you happen to know any youtube videos for this transmission giubo ? As I am not an expert, I am trying to provide local dealer some ideas.
Additonally, someone recommended changing the battery as this was the solution for him to solve a similar issue. Is it possible ?

[RJR82]

a guibo is a rubber flange inbetween drive shaft connection and gearbox( also inbetween driveshaft and diff) google guibo!
also if you google or search on here , gearbox adaptation reset procedure, it might be worth a try

[Dani988]

Originally Posted by RJR82

a guibo is a rubber flange inbetween drive shaft connection and gearbox( also inbetween driveshaft and diff) google guibo!
also if you google or search on here , gearbox adaptation reset procedure, it might be worth a try

Thanks! Found it. Readaptations have been made by dealer. Do you think the battery could also be root cause ?

[RJR82]

i cannot see the battery itself causing an issue like that, but disconnecting it for a while might reset any software gremlins you could have

[Dani988]

Originally Posted by RJR82

i cannot see the battery itself causing an issue like that, but disconnecting it for a while might reset any software gremlins you could have

Ok. I'm taking the car to the dealer on monday. I'll point out what you said. Hope I can solve this as this case has been open for 4 months now...

[Apples12]

Mine did exactly the same.

Changing engine and gearbox mounts about 100,000 miles ago helped.

The mounts have since worn and the jolt is back again, new mounts going in tomorrow

I used febi mounts if that helps

[Dani988]

Originally Posted by Apples12

Mine did exactly the same.

Changing engine and gearbox mounts about 100,000 miles ago helped.

The mounts have since worn and the jolt is back again, new mounts going in tomorrow

I used febi mounts if that helps

Hi,

My car is at the local dealer now for another investigation. Yes, I also have mounts on my purchase list. There is also a clunk noise, like metal hitting metal.

[Apples12]

Originally Posted by Dani988

Hi,

My car is at the local dealer now for another investigation. Yes, I also have mounts on my purchase list. There is also a clunk noise, like metal hitting metal.

This sounds exactly like mine.

Please update on how you get on, mine was better after mounts etc, I'll update tomorrow afternoon after I've had a new set fitted

[Dani988]

Originally Posted by Apples12

This sounds exactly like mine.

Please update on how you get on, mine was better after mounts etc, I'll update tomorrow afternoon after I've had a new set fitted

Car is still at dealer. It takes a huge amount of time in Romania to get the car fixed. I'm in the 5 month with this issue. They still don't know what's causing this. However, I ordered:
1. Engine mounts
2. Gearbox mounts
3. Flex disks for driveshaft
Trying to find the root cause.

[Apples12]

Have you had gearbox service/oil change?

[Dani988]

Originally Posted by Apples12

Have you had gearbox service/oil change?

Yes. As dealer BMW said and also written in the invoice the gearbox (including mechatronic, convertor, egs module) and OIL have been replaced. I also saw the old replaced gearbox but they did not let me take the serial number part. I hope it is not a scam... it's an official BMW dealer, the biggest in Bucharest: Automobile Bavaria Baneasa.

[Apples12]

Mounts changed and no difference in the jolt


I think it is more in the actual gearbox itself.

My car is at 150k and it's done it for the last 50k, it will go for gearbox service again in 10k miles I'll update then.

[Dani988]

Originally Posted by Apples12

Mounts changed and no difference in the jolt


I think it is more in the actual gearbox itself.

My car is at 150k and it's done it for the last 50k, it will go for gearbox service again in 10k miles I'll update then.

Sorry to hear that. Mine is 87k and it does this. Do you also hear a clunk under de car ? Like metal hitting metal ?

[Apples12]

Yes, exactly the same.

Worse if going from reverse into park

It sounds like solenoids aren't being damped in my very uneducated opinion.

I will tolerate and live with it until I change the car.

[Dani988]

Originally Posted by Apples12

Yes, exactly the same.

Worse if going from reverse into park

It sounds like solenoids aren't being damped in my very uneducated opinion.

I will tolerate and live with it until I change the car.

I talked with the dealer today and they said that it can be a "bad consumer" on the electrical side... They are trying this approach now. Did you have any electrical problems or weak battery ?

[Apples12]

Originally Posted by Dani988

I talked with the dealer today and they said that it can be a "bad consumer" on the electrical side... They are trying this approach now. Did you have any electrical problems or weak battery ?

This is interesting as I have had a low voltage code stored in my car's ecu which keeps coming back.. car seems.to start and drive okay so I haven't really been bothered about it.

The battery is the original one from 2013 and is 150k miles old.

I may look to get it replaced

[Dani988]

Originally Posted by Apples12

This is interesting as I have had a low voltage code stored in my car's ecu which keeps coming back.. car seems.to start and drive okay so I haven't really been bothered about it.

The battery is the original one from 2013 and is 150k miles old.

I may look to get it replaced

Seems plausible. I had my minus battery cable (including IBS sensor) replaced because start/stop function was not working. A test with a new battery, OEM and coded/registered would help.

[Dani988]

Changed battery. Same issue. A strong clunk and noise happens when pressing P button. Will change flex disk next.

[Apples12]

Please keep us posted.

Does it only give you the clunk when your doing it parked up stationary and repeating the d>p>d>p routine?

Mine doesn't do it if I've just been driving and come to a stop.

If I then continue to cycle from drive to park it will then make the exact same clunk.

Tbh I'm not too bothered by it as it only happens when I stop... I leave auto hold on when I lock the car it engages p by itself

[Dani988]

Originally Posted by Apples12

Please keep us posted.

Does it only give you the clunk when your doing it parked up stationary and repeating the d>p>d>p routine?

Mine doesn't do it if I've just been driving and come to a stop.

If I then continue to cycle from drive to park it will then make the exact same clunk.

Tbh I'm not too bothered by it as it only happens when I stop... I leave auto hold on when I lock the car it engages p by itself

Hi,

Yes, while stading still on flat surface doing d-p, d-p, d-p. When pressing P I get huge jerk/jolt/shock (you can see it and hear it in video I posted initially).
I also check guibos/flex disks at dealer. They are ok...
After 5 months of service at BMW they can't fix it. They said something about calling someone from Germany, but that means at least 2 additional months.
Maybe the new software of the gearbox is not working ok with the ECU...
Did you check yours at a service ?