Originally Posted by Storamin
you can get an automatic transmission chip. i know that dinan makes some for the 3 series. not so sure if they have them for the 5 series, tho.
Yes!!! They do have something, but I am not sure whether it will decrease the lag or not. Here's the link to the Dinan 5 series one for E39: http://dinancars.com/Series.asp?Seri...e%20Tuning#424
Something better than nothing I guess