The idle on my 91 850 is rough especially when the engine is cold. The car seems to be smooth in general driving though however at about 100kph if I take my foot of the accelerator you can feel a jolt at if somthing is taking up the slack. A bit like you would get out of a worn diff however it only occurs over 80kph (50mph). Are the two related ie throtle imballance or wear and tear and tuning. Loren- Thanks for the dwg on the transmission but the indicator is not shown. The indicator assy clips onto the console panel which surrounds the gear stick.