Some have limiters
When my truck was new it would top out at 116-118. Now that it is BOMBed with DD2s, van Aaken and 5", it still tops out at 118. Except now you can really feel it cut back starting around 112. From what I understand the limiters started on the 2000 models but not all of them seem to have it (?) . I have a 2001 ETH built Feb 2000.
Vaughn