Lifter Tray help

[censo69]

Need a little help.

I have a gen III LS that I rebuilt and bought 4 new lifter trays GM PN12571596 the issue I am having is the new tray grabs the lifter tight on one side and the other is loose. In comparison to the old units I can load all four lifters into the tray and it holds them tight enough that I can pick it up without them falling out. On the new ones 2 would stay and 2 would drop .... this is the same for all 4 trays.



Did I get a bad batch ? the design of the new tray is slightly different then that of the old and I know there is a difference between Gen III and IV but I thought Gen IV parts work fine in the Gen III.

Thanks in advance

[1973Firebird01]

Vince,
I've just finished doing this to my LS1, the trays will be fine. I noticed that my used LS1 lifters some would stay some would drop...the new LS7 lifters that I put in stayed just fine....

[censo69]

Actually I think I have the wrong trays, My part's seem to be for the DOD lifter.