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Electronic sensors don't control anything on this tranny, and it's generally considered a bombproof unit. Its only inputs are a) the shift lever, b) the kickdown cable (but even that won't leave you stuck in first, it'll just shift quite high) and c) the input shaft, connected to the motor. There's one electrical connection, for the overdrive solenoid. If that solenoid fails you'll lose overdrive, but it'll run through the first 3 gears fine. If the filter screen is actually plugged there's already been a fair bit of damage done. Volvo doesn't even recommend cleaning it any more because it doesn't get dirty - unless really bad things have happened to your tranny and clutch material is breaking loose. Try flushing the fluid (see the FAQs) and if that doesn't cure it, get a good used tranny. A fluid flush can work miracles on these, but if not a used one is way cheaper and more reliable than a rebuild, and readily available because it's not uncommon for them to run 300k+ miles.
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Chris, Dartmouth NS Canada 70 M-B 280SE, 83 245DL, 84 244 turbo, 90 780 turbo, 92 VW Golf, 90 740 Rex/Regina
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