It has came to my attention that there are 2 different bottles of rear diff fluid with the same part number 10-4034. One of the bottles has GL5 on it and the other one doesn't. Does anyone know if it is the same fluid and different bottles. i have searched here and the corvette forums but no definitive answer was given other that GL5 is a pressure rating.
OEM part number is= 88862624.
There’s a similar part number= 1#88862624.
Bottles looks almost the same except the 1# part number bottle doesn’t say GL5 on it.
Both carry the same ACDELCO number 10-4034. I wonder if there’s a difference?