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x5pea



Member Since: 03 May 2007
Location: Lanarkshire
Posts: 2097

Scotland 2010 Range Rover Sport 3.0 TDV6 HSE Santorini Black
Gearbox Issues

My RRS seems to have developed an issue with gear changes. Basically it seems to hang onto the gears for a lot longer than it should before changing up. Its most common in 3rd/4th gear, i need to flick across in to tip mode.... change up... then when i put it back into auto it seems to move through 5th and 6th ok. Again when pulling away its always fine up through 1st 2nd but seems to stick on either 3rd of 4th.

Anyone got an ideas, similar experiences? Ive had that many issues recently im starting to loose faith in LR Big Cry

Post #264308 Mon Apr 26 2010 9:03pm
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Nutty Nige



Member Since: 21 Feb 2007
Location: Staffordshire
Posts: 355

United Kingdom 2009 Range Rover Sport TDV6 HSE Stornoway Grey

It needs to go on IDS dealer laptop to check. It might just need self learn adaptions reset and it might be worse. The up-shift points are calculated by throttle position, engine load(air mass meter signal) engine RPM, temperature, and road speed. It could be any of these sensors. Is it re-mapped? because very occasionally the software does not calculate the load map transition to the transmission ECU - but this is very rare - if it's not re-mapped then not. It could be a mechanical fault in the transmission valve body/chest (sticking valve) where by the transmission ECU is switching power to the appropriate shift solenoid but the up-shift is mechanically inhibited. This can easily be proved on IDS screen with a quick run up the road or on wheel free rollers checking actual gear selected. If this is the case you can normally hear the engine note change because on ZF transmissions with petrol units they normally retard the ignition timing during the upshift - to make the shift smoother by taking the load off the engine, but if the up-shift is delayed you can hear the engine note change as the ignition stays retarded until the up-shift has taken place. If it gets any worse it should go into de-fault and give a warning on dash becasue it measures the time between losing the one shift speed and taking up the next on the foward clutches. It is very occasionally the transmission ECU inside the transmission valve body - you have to buy a complete vale body if that's the case.

Good luck. You don't stop playing because you get old, You get old because you stop playing.

07 TDV6 been and gone. 08 TDV6 been and gone. 08.5 TDV8 in evaluation mode and now gone. BMW 535D M sport Been and gone, Now time for RRS No4 - TDV6 HSE in Stornaway with Ebony - 09 Model 6 months old.
RS Cosworth 4x4 Stage 2 Mint for summer
Audi TT
Astra VXR for the daughter.

Post #264406 Tue Apr 27 2010 7:08pm
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