I've found a 5531 spicer browny aux transmission and contemplating putting it in a 09 f350 I've put together. These are under direct and overdrive. The 09 has 4.10 gears with the 5r110 transmission and I've put a newly freshened 12 valve cummins in it. I don't need the under drive but was thinking it should stand up to the cummins in direct pulling a trailer and then have od for empty truck and trailer.
Never been in a truck with one of these, heard they were noisy in OD. It would be nice running 65 to 75 not to be turning 2500 rpms. Any info would be appreciated.
Never been in a truck with one of these, heard they were noisy in OD. It would be nice running 65 to 75 not to be turning 2500 rpms. Any info would be appreciated.