CVT gearbox going in reverse but not forward

Forum for Engine, Exhaust, Drivetrain, ECU
rad87
Posts: 10
Joined: Fri May 21, 2021 10:07 pm
Qashqai Model: Mk.1 Qashqai - J10 (2006–2013)

Post by rad87 »

Hi, thanks for your replies. Very helpful! And actually pointed me towards the internal clutch pack.

So dismantled the oil pan and removed the valve control body. A lot of metal goo got stuck to the magnet and flying in the oil. Oil itself is very dark - car never actually drove since it was changed... cleaned everything, checked all valves, cleaned oil pathways- no change. Video made post work https://youtube.com/shorts/vNITPthWusw?feature=share

No change, pressure goes up to 5MPa which makes me think that the system is trying to pressurise the clutch but it’s slipping or stuck. Slipping is my bet as oil is burnt out!

Do you guys know anybody that can fix / refurbish these? Thanks

rad87
Posts: 10
Joined: Fri May 21, 2021 10:07 pm
Qashqai Model: Mk.1 Qashqai - J10 (2006–2013)

Post by rad87 »

Everybody quick update. Get the gearbox out, stripped out and found broken off sun gear on planetary gear on forward clutch... culprit found, case closed!
duncho
Posts: 1672
Joined: Sun Mar 23, 2014 9:45 pm
Contact:

Post by duncho »

👍 keep us posted, interesting fault. Can you post some photos as well?
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Gomechanic
Posts: 2
Joined: Thu Aug 10, 2023 6:21 pm
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Post by Gomechanic »

Same problem happened with my cvt gear also. But want to know how the sungear got broken from its body
Gomechanic
Posts: 2
Joined: Thu Aug 10, 2023 6:21 pm
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Post by Gomechanic »

ffg
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