Whirlpool's snubber doesn't have as much effect as may be presumed. Vintage service literature states that it should prevent a 4-1/2 pound weight from causing the tub to impact the cabinet during spin. 4-1/2 lbs.
Not to mention that the early models with the original tub ring design that's fully open (no raised interior edge) to water splashing during agitation at lower fill levels, soapy/slippery water substantially reduces the snubber's friction.
I remember in 2004, the washer would make a knocking sound when the agitation started. I suspect it had something to do with the suspension straps. As it progressed, the noise would discipate.
The 4 point hanging assmebly design never belonged in a super capacity central agitator washer. The model T was simply a role play toy to extract the remaining wealth out of GE's name. It worked exactly as intended, for GE only.