Help! Looking for info on an allison tranny, 1994 Monaco with a Cummins 250 hp and World 6 speed. Initial symptom was tranny dropped out of 6th gear and lockup, speedometer failed to zero, do not shift light came on and the control panel/ ECU is dead, no LED indication at all. Limped in a few miles in 5th (Ithink), no lockup and parked. At one time on the limp in the speedometer went nuts, read max plus and the odometer was clicking off tenths wildly, then back to zero mph. I have found a relay board on the firewall and removed and checked all relays, they seem fine. Both 15 amp fuses on the board are OK, one has power full time and the other comes hot with ignition on. I haved removed the ECU/ control panel and checked the black wire (appears to be chassis gnd, and is a solid gnd) Unpluged/ reset all ECU and relay panel connections, no good and no change. Looked at the wires heading into the tranny, see no obvious problems. Any input is appreciated, Thanks!