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These transmissions really don't have a history of early failure, except for some of the very early ones - '93, '94. In our Xc's case, the condition was clearly the lock-up part of the converter, not the shifting through the 4 regular gears. It will lock-up around 45-50 MPH, and you can tell it has locked because the tachometer will not move very fast when you press gas slightly compared to the quick increase in RPM's with same gas pressure at below lock-up speeds (due to action of torque converter)- RPM increase more like a standard transmission with no converter slipage. Ours was particularly bothersome in the mountains, on two lane roads in the 50-60 MPH range, when even slight inclines would normally cause it to unlock and smoothly increase power. During the problem phase, you had to give it a good bit more gas and cause a harsh unlocking (feels like a downshift, but really just unlocking of torque converter) just to maintain speed. Do your shifts at speeds below agout 50 MPH seem quite smooth - up and down? The converter is not locked then, and harsh shifts at lower speeds might indicate an actual transmission issue. I might go to a different shop and do the full flush again, in case the first one did the shortcut method and just charged you for the better way ;-( Based on all of the posts I have read, I would expect this to be cured by a full flush with regular dino ATM - going to full synthetic shouldn't be required. Actually, if your warranty is still in force, this should clearly be covered, whatever the cause, since the car should shift like silk, and most actually do.
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Mike Sullivan ('91 745 (171k), '93 965 (147k), '95 855T (60k), '98 V70XC (78k). Past Volvo's: '85 744 (256k), '86 245 (165k), '86 245 (195k), '88 745 (208k).
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