My 2004 Zed has only 135ks but has a significant clonk when engaging drive or reverse. On hoist it does not appear to have much movement where shaft meets diff, and both rear CVs seem good. Wondering what else it could be. Put some heavier REdline oil in diff but no change? Warn mounts? Brilliant car - just can't diagnose this one fault..
Call Auckland Automatics and have a chat with them. One of the guys here at work had something similar, and also holding gears to long. They new straight away what the problem was. Turned out to be a corroded throttle body, nothing to do with gearbox at all. We swapped out for S/H item and problem solved.