The car is auto 2.9 some times the gear change is very slow can anyone help

Could be 1 of 2 problems
1. Automatic gear boxes use brake bands to slow the car down when changing down gear at reduced speed these also lock the gearbox when the selector is placed in park.
If the bands are worn then the car will creep when placed in park.
2. The selector electronics are faulty or need adjusting (this needs to be carried out by a tech machine at a garage).

Hope thais helps
S

First think, check the rear transmition support, and them, change transmition filter.

Trans range sensor on the transmission!!

have a radiator flush done to it

the brakes slows the movement of the car then the trans and engine slows with that I guess you know you have brakes on all 4 wheels by braking you are slowing down the wheels

check vacuum and electrical connections

hello there

The problem is with the gear oil. To keep ahead of the rest BMW started what they call life time oil for their gear boxes, though that sounds great it doesn't really work in reality, they have now gone back to recommending a gear oil change every 60k miles.

In short you need to change your gear oil and soon, the oil in your gear box is no longer effective and will damage the gear box. You'll need about 5 litres for your car and costs around £15 a litre, expensive stuff!! I had the same problem with my 328i auto, the dealer was clueless and kept quoting the lifetime oil, I changed the oil and the problem has gone and it's so much smoother.

Hope this helps, please don't forget to rate me.

Have speed sensor and control module checked. Try not to run engine up to 5k it's not good for it. Can you shift manually through the gears?

change transmission fluid and filter. have your car scanned to see what the check engine light is telling you.you can take it to advance auto or auto zone. they will scan it for you .tell you what you need .usually when check engine comes on. you got a bad sensor.

when the last time you made a tranny oil change ? or also check the level of oil when all that is done youncan get more technical lets see could be the shift bushing ... easy to install and if its a tranny probleme well maybe time to get that corvette you always wanted go big or go home ahahah good luck