From: Samuel Jones smjones1[AT SYMBOL GOES HERE]FACSTAFF.WISC.EDU
... part of the reason for the epenthetic "l" may have to
do with the diphthonging of the "O"[o + short "u"]. As the lips round
and closure proceeds, the lower jaw rises. Inside the mouth, the tongue
also rises ... the apex of the tongue moves quite close to the
palatal or alveolar position needed for the lateral continuant "L"...
DR. SAMUEL M. JONES University of Wisconsin-Madison
***as far as i've been able to gather, there's very little going on in
the realm of the tongue tip gesture that's significant in the coda [l]'s,
underlying or otherwise. This fact is actually central to a coherent
account of the "merger" (say, of "draw/drawl") having occured at all..
I am, though, convinced that articulatory properties are decidedly more
than incidentally involved in such an account. - BWG