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Hi guys,

So after sorting my dpf, and replacing the b1s1 sensor i have a new question....no..not regarding aircon although i do have a leak to find there....no...this is about motorway driving.

I have the auto 5spd box on my captiva but when on motorway in 5th gear, it will suddenly drop down to about 2000rpm like its a 6th gear or something. Soon as i accelerate it jumps back up like a gear change and off we go....have tried it in manual mode and no 6th gear registers but same happens.....is this some feature i am not aware off??

All help apreciated
(Will post link to video of b1s1 change later to help out others with same issue)
 

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That could be the lock-up clutch engaging in the torque converter, gives an effective overdrive.
 
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