erratic/jumpy speedo.

tempting idea.

It's usually the cable sticking and twitching. I've had the same problems over the years on a Siia 6 pot, an Austin Healey Frog Eyed Sprite and an Austin Healey 3000. Withdraw the cable and closely examine it. I bet you will find one spot polished shiney, or a strand broken and escaping the lay. Check that the cable outer isn't bent into too sharp a curve.

AWEM

Symptoms match a knackered speedo cable, at least that's what it was on another car of mine. I fitted a replacement speedo instead of a cable as I hadn't spotted the cable and the problem went away for about a week but then came back.

The cable appeared to be fine, in that it turned both ends, but on closer inspection the outer sheath had been chewed in the engine bay, cable flex had caused it to start to splinter, which was catching the spinning inner core.

Cable, or possibly the drive gear on the transfer case output shaft is slipping - it is clamped by the nut holding on the output flange and if loose this will give this effect, although the clicking suggests it is the cable. JD

Definitely caused by a sharp bend in the cable which is most usually a kink caused by trapping the cable whilst removing or replacing the gearbox.

Martin

People thanks for the replies.

Will check the cable for kinks, cuts, sharp bents etc.

The transfer box is NOT an LT230 but a BorgWarner (replaced together with the autobox)

But will also check the cable's end at the BW so as to confirm that everything is OK over there too.

Thanks again for your kind replies and suggestions.

Take care Pantelis

In article , Pantelis Giamarellos writes

My old IIA used to do something similar to this. It turned out that the drive gear on the back of the gear box was slipping (on the IIA it was a push on fit).

Adrian

The loose ring gear on the rear output shaft of the transfer box is assembled as a push fit but it is trapped tightly between the output flange and the bearing and will only slip if the nut is loose which holds the output flange.

Martin