Having problem in downshift of Mini pajero vr ii 1997 model

[pwuser150331931087]

Salam..I have Mitsubishi pajero mini vr 2 1997 automatic transmission...For last one year I am having issue with gear problem...I doesnot shift the gear and It only works in third gear...Sometimes it becomes perfect but when I accelerate the car , the gear slips and again lock on third gear...I works only on L but donot works on D or 2.. R is also working well...I have recently changed gear oil and clean its hear filter but still no result

[Xulfiqar]

The ECU shuts down the shifting program and defaults to locked in full pressure hydraulic mode (direct drive/3rd gear) - if the ECU detects slipping while driving/shifting.

Repair/rebuild/replace the gearbox. - You wont be able to rebuild it as its parts are made from unobtanium

[pwuser150331931087]

But why it works properly in summer

[Xulfiqar]

why dont you connect a scan tool to it and look at the available PIDs - you will probably find the culprit.

[alimahr]

wasalam , mini pajero first generation transmission control unit are notorious for failing over passage of time and causing this common problem of directly switching to 3rd gear,especially in winters.Better to replace the transmission CPU with kabli ones , hopefully it will resolve the problem.

[Xulfiqar]

you can also repair it, it was a pretty basic PCB.