Well look, the guys in the States have been getting their lifters replaced under warranty with the new revised lifters since about November 2010. So if you, or anyone else with an earlier L76, were to get them replaced I'd imagine they (Holden)would use the new lifters. The problem is, according to Hexem's mate, the revised lifters can be located on the "parts system" but apparently not available in Australia yet. So this would obviously affect any repair for us Aussie guys. When I asked my parts guy he provided me with the revised part number without any prompting....except to let him know it's a 2011 build. I asked him what the part number was for the eight (8) non-AFM lifters in there and he said they were all AFM lifters....unlike the L76 design. He went on further to say Holden had changed the lifter numbers....blah blah blah....and had only one (1) lifter part number listed for the L77. Which is why I thought the L77 may have had all sixteen (16) lifters as AFM lifters. Only speculation though and can only be confirmed by someone jumping in who actually pulled down an L77 for upgrades.
If my suspicions are correct, you may have the old L76 style lifters in your L77. Mine is a April 2011 build and she's as quiet as!! And all you have to do is read the threads from the G8 guys and they'll confirm that once GM replaced their lifters with the revised lifters their tick tick tick went away and hasn't come back.
