XSeries-forum

im woundering if people could help on problem ive just got..

ive done some recent work new battery & alternator as the car wasnt holding charge.. new bosche maf as old 1 was broke .. few vac pipes and new gaskets ..

running loverly for few days until i got the "gearbox programme safe mode thing on dash"  stuck in 3rd gear .. this will disapear if i turn off and on but 4th and 5th have gone ..  if i drive in manual i wont get the light comin on but 4th -5th it wont even try change .. if i drive in "D or sport i get a smooth shift 1-2-3 but no 4-5 and then ill get light back on if i speed up to much  .. no nasty noises no jerking wat so ever ..

I would really recommend you get an error code read done.  The battery voltage causing a gearbox error goes away immediately.  If yours is coming back that points at a potential transmission issue.  Given repairs can cost £2k, a code read could save you money in case something has really gone bad and the box is correctly in protect mode

[quote="X5Sport"]
I would really recommend you get an error code read done.  The battery voltage causing a gearbox error goes away immediately.  If yours is coming back that points at a potential transmission issue.  Given repairs can cost £2k, a code read could save you money in case something has really gone bad and the box is correctly in protect mode
[/quote]

my mechanic did plug in and reset if i remember it logged 4th & 5th misfuntion .. i will ask him & confirm these codes that we got .. voltage wise on battery  we got correct leveĺs present  .. he did suggest having a gearbox oil change but im not conviced thats the problem as not even trying change to 4th & 5th in manual mode it like the computer shut it off ..

You need those codes as it could be as simple as low fluid level, or a failed solenoid shift valve (easier to fix and common on that box) or a box out and replace all clutch & brake packs, or torque convertor......or others I can’t think of that have affected others on here.

If you do get a hydraulic pressure loss though that will very likely be a rebuild.

little update .. car got scanned and reset again .. fault showing is " gear monitoring 4 "

Clutch slipping on ratio 4 is what the web reports that as.  A chat with a specialist will tell you where next.  Could be bad fluid but if it really is slipping then a rebuild maybe on the cards unfortunately. 

yeah i understand rebuild could be on the cards .. never felt slipping tho but then it doesnt change to 4-5 at minute due to problem although 1-2-3 is strong even on boost .