Based on the speed we drive, an automatic transmission shifts into the best gear to keep the engine at the proper RPM. Watching these shift points can provide an early warning of automatic transmission failure. The speedometer, tachometer and automatic transmission. We measure engine speed in revolutions per minute or RPM.
The mother-in-law's 2005 Renault Clio (auto) shifts very late and stays in too low a gear. When decelerating the tranny downshifts early (it really likes the revs). The garages all want a heafty sum to even pop the hood. Might the issue be something simple such as low tranny fluid level? Anything else that I might check?
There is no 'sport' mode or 'snow' mode that I am aware of.
Thanks.
![Automatic gearbox shifts too early crossword Automatic gearbox shifts too early crossword](/uploads/1/2/5/5/125570353/335220714.jpg)
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1 Answer
This should cause a DTC (Diagnostic Trouble Code) as it's remotely emissions related and can cause a loss of fuel economy. If you're sure that it's not in a mode that disables overdrive (and typically causes the car to stay in gear and shift late, for descending hills), then:
The first thing I would do is try and get a free or cheap code readout. That can point you in the right direction.
The second thing I would try is checking any kickdown switch linkage, or if electronically controlled, the throttle position sensor.
NickNick