the car is a vec-c 150 diesel af40 6 speed box 05 reg seems to have trouble engaing 1st gear mostly when cold can also judder when slowing down from high speed . box has been flushed and refilled by local "gearbox engineer" £200 no warning on dash , would it be a good or bad thing to add a gearbox additive to try and smooth the gearchange . any one tried this or could the prob be something other than sticky shifters i e e c u or wiring probs.
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