Morgan1 wrote:(...) I've dropped the drive shaft and will change the UJ's. The bush in the centre bearing is very flexible? Anyone think this could be the issue i.e. when I engage D or R the drive shaft might be moving / twisting causing the lurch. Same when changing to 2nd but due to speed not doing it in 3rd and 4th? (...)
I have a similar issue, after just replacing a-frame, shocks, springs, uni joints, fitting x308 monobrace that 'lurch' is barely noticeable but still there, I can just about feel it if I tap on gas pedal at 50mph+ or when it sometimes reduces from lets say 3rd to 2nd when slowing down. Which bush in centre bearing is that? I was also thinking maybe gearbox mount or front subframe rear big bushes, difficult to say.
1997, 4.0 LWB X300 - Unlucky car but still a daily driver.
1988, 3.6S XJS - Never ending restoration project.
1994, 3.2S X300 - Accident damaged, October 2015. Gone!
1994, 3.2S XJ40 - Long gone.