My car (diesel-chipped, having 4HP22 box) had the habit of not shifting to 2nd to 3rd until the RPM goes beyond 3000. This behaviour was observed since December last year. Initially, it was till the engine warmed up. Later on it continued irrespective of engine temperature but started after running about 15 mts or so and continued for 2-3 KMs.
Today, when I return from office, suddenly it refused to move irrespective of gear position D to 1, but I was able to reverse.
Called a flat bed and hauled it home. Checked oil level it's okay and colour is normal. Infact oil was changed about 8000 KM ago.
Even after cooling down the symptoms remain same. Checked with Nanocom and got the fault message;
"Anti stall fault ( invalid shaft sensor..........)"
What could be the culprit ?
Is it time to replace the gear box?
thanks in advance.