Help Please. I have a 2001 TD5 90. Of late I have had trouble at low speed with it Kangarooing. It is especially bad when trying to maintain a speed in 1st and 2nd gear. The only way to stop it is to accelerate to to dip the clutch. Last week I was trying to maintain a slow speed up a steep track and it was impossible to keep smooth. Help it is driving me mad.