I'm like Jim....been on three forums over 10 years and have not heard of any reoccurring problem with an Allison transmission.
Could you tell us where you heard that?
2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
Don't know where I'm going, spose I'll get there anyway.