X5 3.0i A5S390R 5L40E accumulator spring - anyone here do this?

[g300d]

So I have been getting a rough 3-4 shift. Higher the rpm, the rougher. Barely noticeable at low to mid rpm shifts.

Research shows rough shifts can be caused by a broken accumulator spring in the trans valve body. Thanks to RRPhil who tore down one of these and posted pics here and on the Range Rover forums.

I have not seen any reference of anyone doing it and posting about it though. Anyone here do a accumulator spring replacement or know of a link to someone who has posted doing it? Would like to get an idea before diving in.

[srmmmm]

When mine started doing it at about 325,000 miles, the dealer re-flashed the transmission and it cleared up the issue. I am still on the original transmission fluid.



2002 X5 3.0 386,700 miles
2014 428i 73,800 miles


2004 325i sold at 123,600 miles
2001 325i sold at 66,000 miles


1970 Firebird Under restoration with no dash cover until Febriary

[g300d]

Originally Posted by srmmmm

When mine started doing it at about 325,000 miles, the dealer re-flashed the transmission and it cleared up the issue. I am still on the original transmission fluid.



2002 X5 3.0 386,700 miles
2014 428i 73,800 miles


2004 325i sold at 123,600 miles
2001 325i sold at 66,000 miles


1970 Firebird Under restoration with no dash cover until Febriary

Thanks for chiming in!

I did try to reset adaptation with INPA, didnt fix it though.

Will a reflash be different in that regard?

[srmmmm]

The refresh involved a software update. The resets just return the transmission to a fresh "learning" status to adjust to the key holder's driving patterns.


2002 X5 3.0 386,700 miles
2014 428i 73,800 miles


2004 325i sold at 123,600 miles
2001 325i sold at 66,000 miles


1970 Firebird under restoration

[g300d]

Gotcha!

The only thing is that before lately, it has always shifted like butter up and down all the gears on the original software.

But I will be looking into this as well as a possible solution, thanks!