Chevy used NP 540 transmission in some big bolts, I've got one in a `60 C60.
5th is direct, 4 fills the 3 - 4 gap on most truck 4 speeds.


BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022