Rough downshifts...

[XV8]

Originally Posted by Weasel

I have no harsh downshifts with my 03 4.6is... and (knock on wood) have had zero indications on any transmission problems as of yet, at 95,000 miles. I did reprogram the DME and EGS with the newest progman software back when I retrofitted the trailer module, just because I could , but had no problems before that either.

If it is all customer pay, you could always ask them for a price to do a tranny pan drain and fill with filter replacement, followed by reprogramming with latest progman software if they still have an operational progman terminal, otherwise ISTA-P programming of the EGS.

A non integrated BMW like the E53 should only cost 1 hour labor to program since it won't need to program everything else with it. And the transmission drain and fill with filter will be a couple hours labor and the fluid is expensive per quart, and you will need about a gallon and a half.

Glad to hear that you don't have this problem at 95K. I'm considering to have the software checked at a BMW dealership. The BMW Service Advisor claimed this diagnostics cost will vary between $60 to $135 (with the software updated to the newest version if necessary).

Also asked if I should be concerned about the tranny... and he replied, "this is a know issue with the V8 engines 4.4, 4.6 and 4.8".

Guess, I gotta take the 1st step to find out what software version my X is running on. Since I do not have BMW warranty coverage but a 3rd party warranty when I purchased the vehicle used (which does cover the cost to replace the tranny)... any advice on how to deal with the BMW service advisors? Wish me luck!!