Bang/Clunk/Kick - after giving gas from a rolling stop - Feels like just got hit!

[Riggodeaux]

I'm not clear from the OP's description of the problem whether this might be the rear suspension/bushing type 'thunk' or a tranny problem. As previously noted, this doesn't sound like the 'trifecta' warning lights indicative of the simple transfer case gear fix. Tdog, if your inspection isolates the problem to your auto tranny engagement, I suggest you visit a tranny specialist with BMW experience for a diagnosis before spending time/money on 'might be.' Where are you located [where is Parker?] If in SoCal, I vaguely recall there is a ZF certified vendor near San Diego? that does repairs and rebuilds ZF trannies. Id your locale and someone may have a suggestion for you.

[Riggodeaux]

Tdog, Dose BMW in San Diego is who I was thinking of - Dose BMW Service Repair San Diego And El Cajon - Dose Independent BMW Service San Diego And El Cajon (619) 449-3835
More in my area, there is a shop north of Atlanta that specializes in european [mostly ZFs] that might be a good place to diagnose.

[garrett.fell]

Sounds like software then.....


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[garrett.fell]

Do you also get a "slow creep kick"? Like if you're rolling through a parking-lot slowly it'll grab 2nd gear with a "thunk"?


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[garrett.fell]

Originally Posted by tdog05

No, I am not feeling that it grabs just trolling through a parking lot.



Usually only at a rolling stop and go when you don't stop all the way. If get to a complete stop it doesn't happen.

That's the same problem I had with mine. You know when it's gonna happen - you get a feel for it. The engine revs a bit then "whack"!

I asked a local bmw shop to bump the transmission control software up to the latest version maybe 25,000 miles ago - it really helped the problem for me. It hardly ever happens anymore.....

I probably need to check the fluid in mine though - I've never done that and I've had it since 73k - it's got 111k on it now.


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[tdog05]

Originally Posted by garrett.fell

That's the same problem I had with mine. You know when it's gonna happen - you get a feel for it. The engine revs a bit then "whack"!

I asked a local bmw shop to bump the transmission control software up to the latest version maybe 25,000 miles ago - it really helped the problem for me. It hardly ever happens anymore.....

I probably need to check the fluid in mine though - I've never done that and I've had it since 73k - it's got 111k on it now.


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--- You answer is the one I was looking for! That is exactly right! You can feel when it's going to happen.

[cgrosse]

Same thing happened to my 4.6is.... transmission overhaul.... fortunately I know a great transmission shop in Boston....Job done for $3500 and good to go!

[mam4.6]

First of all, welcome! We're here to help each other, and show off our X's, from time to time! I get a very slight kick from 2nd to 1st when coming to stop, not always but most of the time. Talked with my Indy, and he suggested checking fluid levels first, and also a software update. Mine isn't bad enough for my wife to notice, but I can tell. These to things are on my to-do list. I've heard quite a few positive reports after software updates...

[LAWLence]

Originally Posted by mam4.6

First of all, welcome! We're here to help each other, and show off our X's, from time to time! I get a very slight kick from 2nd to 1st when coming to stop, not always but most of the time. Talked with my Indy, and he suggested checking fluid levels first, and also a software update. Mine isn't bad enough for my wife to notice, but I can tell. These to things are on my to-do list. I've heard quite a few positive reports after software updates...

Where would one get a software update aside from the dealer?

[garrett.fell]

My Indy did it.


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