Sounds about right m8 as that cv gaitor took a beating and the shaft popped 1/2 out on that side as i was refitting the engine - wouldve been easier to take the box out looking back, but retrospect is a lovely thing!

Anyway, so yours was like driving over a series of small speed bumps when off-throttle? If so thats sounds just like mine, so il give that a go before i change the box!