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Volvo S80 Transmission Stuck in Performance Mode

Volvo S80 002 -

Svenska:
 Volvo S80 Summum D5 2010.
Credit: Bernt Fransson / CC BY-SA (https://creativecommons.org/licenses/by-sa/4.0)

Is your Volvo S80 Transmission Stuck in Performance Mode?

Volvo S80 Transmission – They Fail Often, Can Be Rebuilt

“Volvo’s transmission in this car is a GM 4T65-type transaxle. There are two versions: the 4T65EV and the 4T65EV-GT (GearTronic). My advice: have it rebuilt by a competent transmission shop (get references, shop around, ask for references from other shops; find a shop that works on police cars, for example)…because it’s a GM transmission, they’ve likely done hundreds and, many times, the transmission will be better off than a new one.”

1999 Volvo S80 stuck in performance mode
Volvo S80 Transmission Stuck

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Volvo’s transmission in this car is a GM 4T65-type transaxle. There are two versions: the 4T65EV and the 4T65EV-GT (GearTronic). My advice: have it rebuilt by a competent transmission shop (get references, shop around, ask for references from other shops; find a shop that works on police cars, for example)…because it’s a GM transmission, they’ve likely done hundreds and, many times, the transmission will be better off than a new one.

I still have to wonder what Volvo did to this gearbox, in terms of loading, to make it fail at these rates–the 4T65/4T65E has a mean service life (in my experience, in sunny Florida; your mileage may vary) of at least 150K on GM cars. My Buick had a 4T65 and it lasted 210K before I junked the car, and it still shifted perfectly smoothly.

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