Transmission problem, any ideas ???

[Bismark]

Mine is an 2001 X5 3.0 with only 70k miles. Started having an intermittent hard shift on low acceleration when making the 2-3 shift, more noticeable when releasing the gas pedal. After some research, I found out that BMW has a TSB 24 51 00 (technical service bulletin) which actually describes this condition. The TSB prescribes a software update to remedy this condition. Today I had the BMW Dealer perform this update. It corrected the problem but created another one. Now I have a hard shift on the 1-2 upshift on medium to heavy acceleration. I am very disappointed to say the least. I welcome any suggestions. Thanks.

[Boston X5 4.4]

Try the reset procedure.

- turn key to position II
- press gas pedal all the way to the floor, past the 'click'
- hold like this for ~ 30 seconds
- lift foot off gas pedal
- turn key all the way to the right (i.e. start car)
- drive forward

Worked for me for 1-2 and 2-1 hard shift

[flyingmachine]

Originally Posted by Boston X5 4.4

Try the reset procedure.

- turn key to position II
- press gas pedal all the way to the floor, past the 'click'
- hold like this for ~ 30 seconds
- lift foot off gas pedal
- turn key all the way to the right (i.e. start car)
- drive forward

Worked for me for 1-2 and 2-1 hard shift

isnt' this procedure only for 03'+ X5?

[primetime]

Originally Posted by flyingmachine

isnt' this procedure only for 03'+ X5?

No..

[kennoli]

my 05 4.4i is doing the exact thing. I had the trans reflashed 2 weeks ago.Thanks for the tip!

[Naz24]

gotta ttry this

[Whitecat]

I had same problem but only at cold start 1-2 and used Boston 4.4 procedure.
It works for me but only for a week or two and came back.

Than, i've tried to let the car running a bit and start slowly...slight improvement.

I've decided to full flush transmission fluid (transmission shop did this including torque convertor)

Situation now is clearly better but still feel the kick but more soft...i will live with it.

[titofre]

Hello. I have the same problem.
upshift 1-2 gives a blow and stop at traffic lights slams.
The car has 58000 km, someone can tell me if it has been fixed.
The first morning shift 1-2 is smooth.
thanks

[upallnight]

Originally Posted by Bismark

Mine is an 2001 X5 3.0 with only 70k miles. Started having an intermittent hard shift on low acceleration when making the 2-3 shift, more noticeable when releasing the gas pedal. After some research, I found out that BMW has a TSB 24 51 00 (technical service bulletin) which actually describes this condition. The TSB prescribes a software update to remedy this condition. Today I had the BMW Dealer perform this update. It corrected the problem but created another one. Now I have a hard shift on the 1-2 upshift on medium to heavy acceleration. I am very disappointed to say the least. I welcome any suggestions. Thanks.

On the hard shift from 1-2 what rpm is the engine at? If the engine is at 5000 or more rpm the shift will always be hard. Driving aggressively will cause the engine to shift at a later point on the rpm scale.

Originally Posted by titofre

Hello. I have the same problem.
upshift 1-2 gives a blow and stop at traffic lights slams.
The car has 58000 km, someone can tell me if it has been fixed.
The first morning shift 1-2 is smooth.
thanks

Why don't you bring it to a specialist before you cause more damage to the trans by ignoring the symptoms and keep driving the truck. At the very least get it scan for fault code. Can't afford to bring it to a specialist, then a used BMW is not the right car for you.

[bcredliner]

Originally Posted by Bismark

Mine is an 2001 X5 3.0 with only 70k miles. Started having an intermittent hard shift on low acceleration when making the 2-3 shift, more noticeable when releasing the gas pedal. After some research, I found out that BMW has a TSB 24 51 00 (technical service bulletin) which actually describes this condition. The TSB prescribes a software update to remedy this condition. Today I had the BMW Dealer perform this update. It corrected the problem but created another one. Now I have a hard shift on the 1-2 upshift on medium to heavy acceleration. I am very disappointed to say the least. I welcome any suggestions. Thanks.

In your case since the BMW dealer created the problem, I would go back to them to find out why that happened. They may want to do diagnostics but you can leave and get a second opinion and second estimate of the cost to fix, only paying for the diagnostic time if updating the software a second time is not the fix.