In reply to 9th Feb 2013, 07:26

10th Feb 2013, 01:10

I agree, this "621/2 shift" sounds interesting....

I've searched Google and found nothing.

In reply to 9th Feb 2013, 07:26

24th Apr 2015, 17:43

Is this 621\2 shift thing for real? Can't find anything on it.

In reply to 9th Feb 2013, 07:26

30th Mar 2016, 12:58

I know I am late to this discussion, but I am entertaining the idea of picking up a '90 XJS so I am looking through reviews. If you guys haven't found any answers yet or have stopped looking, the 621/2 shift may be referring to the fault code for the solenoid, "P0781-62: 1-2 Shift". I did a little research and it seems these cars may develop a hard shift between certain gears if the solenoid is having issues. The 62 1-2 is the solenoid between first and second. You're right that there isn't much info out there, but I would venture a guess that this means you could really gas it in first and when it changes to second it would really slam in there. Just a thought.