"What Ratio is Your Powerglide, 1.76 or 1.82?"
A commonly asked question on our Tech Line
is, "How do you know what ratio Powerglide I have?". The answer is
easy if the unit is disassembled, the planetary is sitting in front of
you and the unit is stock General Motors parts. The cast steel housing
with non-removable pins is a 1.76 ratio. The stamped steel housing
with removable pins (remove three screws) is a 1.82 ratio. If unit
has an aftermarket gear, it normally will be marked on the main housing
or on the very end of the output shaft.
How do I know the ratio if the transmission is laying on the floor and altogether? It is quite easy if the units are 1.76 or 1.82 ratio.
Note: This procedure can be used to check aftermarket ratios, but you will have to figure out the clock position for each one. Some of them are almost the same, Example: 1.89 and 1.90.