Check out this post:
https://www.volvoforums.org.uk/showt...mission+lockup
Tannaton has a wealth of experience and discusses the normal behaviour of transmission lockup
Lockup occurs at approx (mph)
30 in 3rd
40 in 4th
50 in 5th
And some overrun is allowed: ie transmission slowing the engine (engine braking)
How much I'm not sure, ask Tannation....
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.
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