My V70 transmission shifts fine when cold, but after driving it for 10 minutes or more, it down shifts hard. It acts like it is shifting ramdomly. It is getting progressively worst. Help will be greatly appreciated.

 

Hello, Model year, mileage and trim level of car please. We can't tell you to service your unit (flush and see to updates) without this info. Kira

 

The car is a 2005 Volvo V70 SW. 2.5 Turbo the vin # is YV1SW592052480720 milage is 87500 and the TCM has a code 002F, the fluid is black and has never been flushed.

 

Hello, Given that your fluid is black I would disconnect the lower transmission cooling line at the radiator and do the complete flush were it my car. Drain the black stuff out of your transmission sump (3.5 qts.) via the drain plug (24mm hex head). You'll need an 18mm aluminum crush washer. Get them from site sponsors or in a two pack on the rack of generic stuff in parts stores. Replace the 3.5 qts with new and do the flush 2 qts at a time. You can see the fluid turn clean through the 1/2" clear plastic drain hose. Put one end in boiling water so it gets soft and easily stretches over the end of the cooling line. The only other things you'll need are the two O rings and a spare plastic clip for the transmission line and old containers marked at 2 qt. increments. The O rings get replaced, the clip is necessary in case you break yours. My plastic clip didn't break but it could've. A dealer can look up your car's vin to see if the TCM has been updated or not. It's easy to do. Kira

 

might be wise to also install an external transmission cooler.

 

I flushed the transmission using the Mobil 3309 ATF. Transmission shifts up a lot better no slips and performed well for 10 minutes, then the hard shift down returned, but this is only the 2-1 shift mutch better than before. I still going to have the TCM reflashed. It has the 002F code in it. Does any one know about the torque strut on top of tne engine, mine seems lose it has at least 1/8" play inside the bracket. All info will be greatly appreciated.