Not that rare. If I corner hard enough in mine it'll do the same. It'* done it like that for the past 50k miles, at least.
I'm 90% sure it'* a transmission thing. You corner, and the fluid isn't where it needs to be, or something... Keeping the fluid at the top of where it should be seems to help a little, but mostly I've just learned how to take corners, to keep it from happening.
I'm really surprised that nobody else has mentioned this being somewhat common. I thought it was a problem with the design of these transmissions, even on the newer models to some extent. Am I mistaken? Not to this extent, usually... but they like to slip a bit under high cornering forces, IIRC.
I'm Jon. I'm completely stock, no mods.
1993 Bonneville SSE 191,000 miles "The Work Beater" Imperfect but quite tolerable. Stock.
1996 Buick LeSabre Limited, 181,000 miles "The family car" Custom CAI, F41 Sways.
Sold/dead, but not forgotten: 1989 Bonneville LE "Bonnie, the Sport Utility Car" STB from '92-'99 Bonnie, Delco (Type II) Ignition system
Our Cars | TheJMFC Forum | The Ordinary Car Club of West Michigan