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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22907
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Dear sirs. I have recently purchased a juke Techna 1.6 petrol

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Dear sirs. I have recently purchased a juke Techna 1.6 petrol CVT, 12 plate with under 10'000 miles.(Still under warranty). Whilst I am happy with car generally, I have major concerns with the autobox performance as follows.
Normal local travel seems ok, my problem is motorway travel. The car runs out of steam at around 65 to 70 mph, the most that I have had is 80 on a flat road or even better, on a hill a can loose 20mph very quickly. Whilst I have no real need to travel in excess of 80mph,the problem is lack of power makes overtaking a nightmare. This is in normal gearbox mode.
I have noticed that whilst driving at best speed on dual carriageway, and slowing to 20 or 25 to go round an island, the car will not accelerate quickly to avoid trafic from behind,I noticed that the tacko fluctuates wildly between 5000 and 6000 revs.
When coming into my drive which has a small lumpy incline, I am ok if I am moving at slow speed I am ok, If I stop with the back wheels on the bump,it takes a lot of revs to get over.
The best way I could explain is this,with a normal geared auto (Of which I have had many) with a torque converter,the problems I am having would point to a faulty converter. Loss of power and larger than usual fluctuations on the tachometer.
I thank you in advance for any advice as I am somewhat worried.
Des readey
Hello Des

I'd agree that this isn't normal and to me there's either an issue with the CVT fluid being worn out ( unlikley) or the transmisson control module

I think its more likely to be the latter as its allowing too much slip and I'd go back to the dealer and request that they update the ECU with the latest level of software and to check the condition of the transmisson oil

if the oil is heavily discoloured it should be replaced
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Customer: replied 3 years ago.
Thanks matt. I will contact the dealer asp and request this work be undertaken, do you think that my warranty will cover such attention?.
You have confused me with your point about CVT fluid, I thought that the engine and auto-box ran off the engine oil. I have not noticed any other dipsticks other than for the engine.
Regards. Des
Hello Des

there's no dipstick for the transmisson but it does have its own seperate oil as the properties required for a gearbox are quite different to that of an engine

and yes your warrenty should cover this work