I am looking for informtion on a transmission installed on a Barber
Greene Trenching Machine Model TA-57 Serial No. TA57X132 possibly
manufactured in 1977.  The transmission is called "transmission & pump
drive gear box" in the parts catalog. Barber Greene went out of
business many years ago therefore it is difficult to trace the source
of supply of spare parts for this machine.  The transmission has no
name plate on it which makes it difficult to identify the manufacturer
of the transmssion.  There is however a embossed number in the casting
of the gear box housing which reads "A53-2602CR".  My gutt feeling is
that this transmission if of Allison manufacture.  I am not sure I am
correct in assuming this.  Transmission could be of any other
manufacture
My question is:  1) Manufacturer of the transmission. 2) The source
for supply of spare parts for this transmission.